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Universidade do Rio Grande do Sul
1.
Borges, Fernanda Cabral.
Proposta de um modelo conceitual de biorrefinaria com estrutura descentralizada.
Degree: 2010, Universidade do Rio Grande do Sul
URL: http://hdl.handle.net/10183/24714 
► A busca por segurança energética tem feito com que a maioria dos países empenhe-se na busca por fontes alternativas de energia, procurando mitigar problemas econômicos,…
(more)
▼ A busca por segurança energética tem feito com que a maioria dos países empenhe-se na busca por fontes alternativas de energia, procurando mitigar problemas econômicos, sociais e ambientais. Espera-se que a biomassa, disponível de forma geograficamente dispersa, venha a tornar-se um dos principais recursos renováveis na produção de alimentos, materiais, produtos químicos, combustíveis e energia. Nesse cenário, o desenvolvimento de biorrefinarias representa a chave para uma produção integrada, combinando rotas de conversões químicas, bioquímicas e termoquímicas, no processamento da biomassa, visando à utilização otimizada dos recursos disponíveis. As biorrefinarias com estruturas descentralizadas são uma alternativa à centralização de produções em grandes plantas industriais e à monocultura, pois utilizam biomassas disponíveis regionalmente, integram sistemas de produção, potencializando os recursos locais, reduzem custos com logística e impactos ambientais, além de melhorarem a distribuição da renda. O presente trabalho apresenta uma revisão da disponibilidade de biomassa no Brasil e no mundo, com especial interesse no aproveitamento de microalgas e resíduos orgânicos, dos principais produtos de interesse e conceitos de biorrefinarias existentes. O objetivo é discutir qual é o conceito que melhor se adapta às necessidades do cenário brasileiro, bem como propor um modelo com estrutura descentralizada em duas ou três etapas, visando à otimização de um processamento sustentável de biomassa para obtenção de vários produtos comerciáveis e energia, além de delinear diretrizes para investimentos na área. É apresentada uma metodologia para a tomada de decisões na concepção e análise de viabilidade do projeto conceitual de uma biorrefinaria, considerando-se também as restrições de ordem ecológica, econômica e tecnológica. Como estudo de caso, é proposta uma biorrefinaria a partir de microalgas. A escolha por microalgas como matéria-prima é baseada nas vantagens que sua utilização apresenta frente à de outras biomassas, dentre elas cita-se a capacidade de produção rápida e durante todo o ano, a captura do CO2 necessário ao seu crescimento, a necessidade de menos água do que plantas terrestres, são cultiváveis em água salobra e terras não aráveis, apresentam elevado teor de óleo, seus nutrientes podem ser obtidos a partir de águas residuais, sua composição bioquímica pode ser modulada por diferentes condições de crescimento e são capazes de produção fotobiológica de bio-hidrogênio. Das alternativas de rotas possíveis para seu processamento, são apresentadas duas que apontam como sendo as mais promissoras: o uso da microalga como substrato de algum outro microorganismo, visando à obtenção de compostos com maior valor agregado, tais como biopolímeros, e o uso do processo de pirólise rápida para obtenção de bio-óleo, que deve ser processado posteriormente, visando à especificação em biocombustível. As vantagens da otimização do cultivo, colheita, rotas viáveis de processamento e a análise do potencial econômico desse modelo,…
Advisors/Committee Members: Trierweiler, Jorge Otávio.
Subjects/Keywords: Biomassa; Biorefineries; Biorrefinaria; Biomass; Microalgae; Bioproducts
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APA (6th Edition):
Borges, F. C. (2010). Proposta de um modelo conceitual de biorrefinaria com estrutura descentralizada. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/24714
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Borges, Fernanda Cabral. “Proposta de um modelo conceitual de biorrefinaria com estrutura descentralizada.” 2010. Thesis, Universidade do Rio Grande do Sul. Accessed January 20, 2021.
http://hdl.handle.net/10183/24714.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Borges, Fernanda Cabral. “Proposta de um modelo conceitual de biorrefinaria com estrutura descentralizada.” 2010. Web. 20 Jan 2021.
Vancouver:
Borges FC. Proposta de um modelo conceitual de biorrefinaria com estrutura descentralizada. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2010. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10183/24714.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Borges FC. Proposta de um modelo conceitual de biorrefinaria com estrutura descentralizada. [Thesis]. Universidade do Rio Grande do Sul; 2010. Available from: http://hdl.handle.net/10183/24714
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Manchester
2.
Vlysidis, Anestis.
Sustainable biodiesel biorefineries for the green
succinic acid production.
Degree: 2011, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:129755
► There is a huge global challenge to establish alternative forms of energy in order to cope with the increasing worldwide energy demand, currently based on…
(more)
▼ There is a huge global challenge to establish
alternative forms of energy in order to cope with the increasing
worldwide energy demand, currently based on finite fossil fuel
reserves. In the transportation sector, renewable liquid fuels,
such as bio-ethanol and biodiesel which are made from biomass and
are substitutes for the petroleum-derived gasoline and diesel, have
received increasing interest. In spite of their recent development,
the biofuel industries cannot compete with conventional liquid
fuels because of their higher costs. Decisive changes are required
to improve their economic sustainability, such as the establishment
of novel processes that utilize their by-products for the
production of value-added chemicals. In this study, the
bioconversion of glycerol, which is the main by-product of the
biodiesel industry, to succinic acid by using the bacterium
Actinobacillus succinogenes has been investigated both
experimentally and computationally. Initially, the cells were
adapted to accept a glycerol rich environment by performing a
series of experiments. Cells from the best experiment from each run
were used as inocula for the next experiment. Batch fermentations
were then performed in small scale anaerobic reactors (SARs) and in
lab-scale bench top reactors (B-TRs) by using the new ‘adapted’
strain. The maximum succinic acid yield, productivity and final
concentration obtained from this bioprocess were found to be 1.29
g/g, 0.27 g/L/h and 29.3 g/L, respectively. Moreover, cells have
also grown successfully in both synthetic and biodiesel-derived
crude glycerol, indicating that it is not necessary to remove the
impurities that biodiesel-derived glycerol contains. Subsequently,
an unstructured model that accounts for substrate and product
inhibition was developed in order to predict the behaviour of
experiments starting from different initial conditions. Model
predictions were found to be in good agreement with experimental
data obtained for both systems (SARs and B-TRs). Batch and
fed-batch systems were optimized using the developed model to
obtain high succinic acid productivity. Optimization results showed
that productivity increased by 31% for batch and 79% for fed-batch
systems. The corresponding optimal values were computed to be equal
to 0.356 g/L/h for batch and 0.488 g/L/h for fed-batch systems. A
semi-mechanistic model for the fungal fermentation on solid state
rapeseed meal (i.e. the other main by-product of the biodiesel
industry) was also constructed for small scale tray bioreactors.
This fermentation targets to increase the nutrient factor of the
rapeseed meal by decomposing its macromolecules to simple compounds
which can then be used as a generic medium. The developed model
effectively predicts the fungal growth, the temperature
fluctuations and the moisture content inside the bed and the
produced extracellular enzymes that break the complex compounds of
rapeseed meal (i.e. proteins) to free amino acids. The economic
sustainability of biodiesel production was investigated by the
construction of a…
Advisors/Committee Members: Theodoropoulos, Konstantinos.
Subjects/Keywords: Integrated Biorefineries; Succinic acid; Sustainable Industries; Biofuels
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APA (6th Edition):
Vlysidis, A. (2011). Sustainable biodiesel biorefineries for the green
succinic acid production. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:129755
Chicago Manual of Style (16th Edition):
Vlysidis, Anestis. “Sustainable biodiesel biorefineries for the green
succinic acid production.” 2011. Doctoral Dissertation, University of Manchester. Accessed January 20, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:129755.
MLA Handbook (7th Edition):
Vlysidis, Anestis. “Sustainable biodiesel biorefineries for the green
succinic acid production.” 2011. Web. 20 Jan 2021.
Vancouver:
Vlysidis A. Sustainable biodiesel biorefineries for the green
succinic acid production. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2021 Jan 20].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:129755.
Council of Science Editors:
Vlysidis A. Sustainable biodiesel biorefineries for the green
succinic acid production. [Doctoral Dissertation]. University of Manchester; 2011. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:129755
University of Newcastle
3.
Shamsuddin, Fahim Murshed.
Modelling the starch, TAGs and functional biomass kinetics of green algae as a function of nitrogen concentration and light flux.
Degree: PhD, 2019, University of Newcastle
URL: http://hdl.handle.net/1959.13/1408704
► Research Doctorate - Doctor of Philosophy (PhD)
Algae as a potentially sustainable source of fuel, feed and nutraceuticals has led to interest in the algae…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
Algae as a potentially sustainable source of fuel, feed and nutraceuticals has led to interest in the algae biorefinery concept for production of sustainable products. The cultivation of algae has several advantages as algae can grow in non-potable water and in non-arable land and can sequester CO₂ from flue gas. In addition, different components of the algae produce different value-added products such as biodiesel, which is obtained from TAGs, bioethanol from starch and animal feed from functional biomass. However, there is a lack of commercial viability for photosynthetic algae due to limitations in biomass productivity and the capacity to optimise the chemical composition of the algae, both of which are caused by suboptimal nutrient loading and low light conditions. Therefore, this thesis aims to understand how to optimise the production of the individual biochemical algae components, namely, starch, TAGs and functional biomass by modelling batch photosynthetic cultures. Special attention was given to the influence of external nitrogen and light conditions on composition kinetics. The primary species studied in this thesis is <i>Chlorella vulgaris</i> for varying nitrogen load and <i>Scenedesmus obliquus</i> for varying light flux. Biochemical measurements on <i>S. Obliquus</i> for different light conditions were reported and compared with the simulation model. Finally, trial experiments on the effect of glucose relative to a photosynthetic control on algal growth were also performed on <i>Nannochloropsis oculata</i> and <i>Tetraselmis Chuii</i>. A review of algal composition modelling was carried out to assess the current gap in modelling functional biomass, starch and TAGs/lipids as a function of light and extracellular nitrogen. It was found that batch and fed batch studies simulated the algae as being composed of only two fractions, lipids and functional biomass. However, the starch fraction was omitted in most published work, although it is a major component of algae and possesses different kinetic behaviour from lipids and functional biomass. Nevertheless, there were some studies of continuous cultures on starch, TAGs and functional biomass, but to date there are no batch mode studies on photosynthetic cultures that model starch, TAGs and functional biomass simultaneously. A mathematical model of starch, TAGs and functional biomass kinetics of <i>C. vulgaris</i> was developed to elucidate the primary mechanisms of photosynthetic kinetics. This was achieved by explicitly modelling starch, TAGs and functional biomass fractions for a batch photosynthetic reactor. In addition, TAGs production due to starch glycolysis was also considered in the model. This biochemical pathway has not been previously modelled in the literature. The model was composed of six coupled ordinary differential equations and 11 secondary equations and was coded and solved in Matlab. The parameters were tuned by minimising an objective function, which was the overall relative error of the…
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.
Subjects/Keywords: green algae; fuel sources; biorefineries; algae cultivation
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APA (6th Edition):
Shamsuddin, F. M. (2019). Modelling the starch, TAGs and functional biomass kinetics of green algae as a function of nitrogen concentration and light flux. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1408704
Chicago Manual of Style (16th Edition):
Shamsuddin, Fahim Murshed. “Modelling the starch, TAGs and functional biomass kinetics of green algae as a function of nitrogen concentration and light flux.” 2019. Doctoral Dissertation, University of Newcastle. Accessed January 20, 2021.
http://hdl.handle.net/1959.13/1408704.
MLA Handbook (7th Edition):
Shamsuddin, Fahim Murshed. “Modelling the starch, TAGs and functional biomass kinetics of green algae as a function of nitrogen concentration and light flux.” 2019. Web. 20 Jan 2021.
Vancouver:
Shamsuddin FM. Modelling the starch, TAGs and functional biomass kinetics of green algae as a function of nitrogen concentration and light flux. [Internet] [Doctoral dissertation]. University of Newcastle; 2019. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1959.13/1408704.
Council of Science Editors:
Shamsuddin FM. Modelling the starch, TAGs and functional biomass kinetics of green algae as a function of nitrogen concentration and light flux. [Doctoral Dissertation]. University of Newcastle; 2019. Available from: http://hdl.handle.net/1959.13/1408704
University of Limerick
4.
Hayes, Daniel J.
Analysis of lignocellulosic feedstocks for biorefineries with a focus on the development of near infrared spectroscopy as a primary analytical tool.
Degree: 2011, University of Limerick
URL: http://hdl.handle.net/10344/1988
► peer-reviewed
The processing of lignocellulosic materials in modern biorefineries will allow for the production of transport fuels and platform chemicals that could replace petroleum-derived products.…
(more)
▼ peer-reviewed
The processing of lignocellulosic materials in modern biorefineries will allow for the production of transport fuels and platform chemicals that could replace petroleum-derived products. However, there is a critical lack of relevant detailed compositional information regarding feedstocks relevant to Ireland and Irish conditions. This research has involved the collection, preparation, and the analysis, with a high level of precision and accuracy, of a large number of biomass samples from the waste and agricultural sectors. Not all of the waste materials analysed are considered suitable for biorefining; for example the total sugar contents of spent mushroom composts are too low. However, the waste paper/cardboard that is currently exported from Ireland has a chemical composition that could result in high biorefinery yields and so could make a significant contribution to Ireland’s biofuel demands.
Miscanthus was focussed on as a major agricultural feedstock. A large number of plants have been sampled over the course of the harvest window (October to April) from several sites. These have been separated into their anatomical fractions and analysed. This has allowed observations to be made regarding the compositional trends observed within plants, between plants, and between harvest dates. Projections are made regarding the extents to which potential chemical yields may vary. For the DIBANET hydrolysis process that is being developed at the University of Limerick, per hectare yields of levulinic acid from Miscanthus could be 20% greater when harvested early compared with a late harvest.
The wet-chemical analysis of biomass is time-consuming. Near infrared spectroscopy (NIRS) has been developed as a rapid primary analytical tool with separate quantitative models developed for the important constituents of Miscanthus, peat, and (Australian) sugarcane bagasse. The work has demonstrated that accurate models are possible, not only for dry homogenous samples, but also for wet heterogeneous samples. For glucose (cellulose) the
root mean square error of prediction (RMSEP) for wet samples is 1.24% and the R2 for the validation set (R²val) is 0.931. High accuracies are even possible for minor analytes; e.g. for the rhamnose content of wet Miscanthus samples the RMSEP is 0.03% and the R²val is 0.845.
Accurate models have also been developed for pre-treated Miscanthus samples and are discussed. In addition, qualitative models have been developed. These allow for samples to be discriminated for on the basis of plant fraction, plant variety (giganteus/non-giganteus), harvest-period (early/late), and stand-age (one-year/older).
Quantitative NIRS models have also been developed for peat, although the heterogeneity of this feedstock means that the accuracies tend to be lower than for Miscanthus. The development of models for sugarcane bagasse has been hindered, in some cases, by the limited chemical variability between the samples in the calibration set. Good models are possible for the glucose and total sugars…
Advisors/Committee Members: Leahy, James J..
Subjects/Keywords: lignocellulosic materials; transport fuels; biorefineries; biomass samples
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APA (6th Edition):
Hayes, D. J. (2011). Analysis of lignocellulosic feedstocks for biorefineries with a focus on the development of near infrared spectroscopy as a primary analytical tool. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/1988
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hayes, Daniel J. “Analysis of lignocellulosic feedstocks for biorefineries with a focus on the development of near infrared spectroscopy as a primary analytical tool.” 2011. Thesis, University of Limerick. Accessed January 20, 2021.
http://hdl.handle.net/10344/1988.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hayes, Daniel J. “Analysis of lignocellulosic feedstocks for biorefineries with a focus on the development of near infrared spectroscopy as a primary analytical tool.” 2011. Web. 20 Jan 2021.
Vancouver:
Hayes DJ. Analysis of lignocellulosic feedstocks for biorefineries with a focus on the development of near infrared spectroscopy as a primary analytical tool. [Internet] [Thesis]. University of Limerick; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10344/1988.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hayes DJ. Analysis of lignocellulosic feedstocks for biorefineries with a focus on the development of near infrared spectroscopy as a primary analytical tool. [Thesis]. University of Limerick; 2011. Available from: http://hdl.handle.net/10344/1988
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
5.
Vani Sankar; Rajeev Kumar Sukumaran.
Strategies for improved enzymatic hydrolysis of lignocellulose.
Degree: 2015, Cochin University of Science and Technology
URL: http://dyuthi.cusat.ac.in/purl/5128
Subjects/Keywords: Bioethanol; Biorefineries; Pretreatment of Biomass
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APA (6th Edition):
Sukumaran, V. S. R. K. (2015). Strategies for improved enzymatic hydrolysis of lignocellulose. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/5128
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sukumaran, Vani Sankar; Rajeev Kumar. “Strategies for improved enzymatic hydrolysis of lignocellulose.” 2015. Thesis, Cochin University of Science and Technology. Accessed January 20, 2021.
http://dyuthi.cusat.ac.in/purl/5128.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sukumaran, Vani Sankar; Rajeev Kumar. “Strategies for improved enzymatic hydrolysis of lignocellulose.” 2015. Web. 20 Jan 2021.
Vancouver:
Sukumaran VSRK. Strategies for improved enzymatic hydrolysis of lignocellulose. [Internet] [Thesis]. Cochin University of Science and Technology; 2015. [cited 2021 Jan 20].
Available from: http://dyuthi.cusat.ac.in/purl/5128.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sukumaran VSRK. Strategies for improved enzymatic hydrolysis of lignocellulose. [Thesis]. Cochin University of Science and Technology; 2015. Available from: http://dyuthi.cusat.ac.in/purl/5128
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
6.
Christofoletti, Guilherme Bueno.
Estudo dos efeitos de etapas de pré-tratamento na hidrólise ácida de bagaço de cana-de-açúcar.
Degree: Mestrado, Ciência e Engenharia de Materiais, 2010, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/88/88131/tde-13102010-211833/
;
► De forma sustentável o setor sucroalcooleiro nacional apresenta grande potencial para o desenvolvimento tecnológico de fontes alternativas de energia. A partir das novas concepções de…
(more)
▼ De forma sustentável o setor sucroalcooleiro nacional apresenta grande potencial para o desenvolvimento tecnológico de fontes alternativas de energia. A partir das novas concepções de emprego de energias alternativas, o resíduo industrial do processamento da cana-de-açúcar passa a ser uma matéria-prima com grande potencial e valor. De forma ilustrativa da potencialidade deste material, os dados de produção de bagaço de cana e suas aplicações estão destacados na parte introdutória, compreendendo a possível integração das usinas com as biorrefinarias. A utilização do bagaço de cana-de-açúcar como combustível para co-geração de energia atende à necessidade de mercado, sendo que a rentabilidade de energia elétrica é altamente viável. Porém, considerando-se que esta matéria-prima apresenta características peculiares para a biorrefinaria, objetivou-se o fracionamento da biomassa. As metodologias são investigadas por abranger a conversão da biomassa(bagaço e palha de cana-de- açúcar) para uma variedade de produtos de maior valor agregado (energia, biomateriais e produtos químicos). As etapas de fracionamento, ou seja, de pré-tratamentos foram: préhidrólise, deslignificação e branqueamento. A pré-hidrólise apresentou-se seletiva para a remoção das hemiceluloses, já para a etapa de deslignificação, mostrou-se mais seletiva para a remoção de ligninas, embora houvesse grande remoção também das hemiceluloses. Para a etapa de branqueamento, a remoção residual de lignina foi atingida, porém também foi removido celulose. A avaliação das etapas de pré-tratamentos foi realizada pela determinação dos rendimentos de processos, da seletividade reacional, bem como pela quantificação dos produtos e resíduos obtidos. Os materiais obtidos nas etapas de pré-tratamentos foram caracterizados e posteriormente submetidos ao processo de hidrólise ácida. São apresentados os resultados de rendimento de obtenção de glicose a partir de celulose, em base celulose inicial e em base celulose reagida. Na primeira parte, discutiram-se os rendimentos gravimétricos das reações de hidrólise ácida que para o material in natura resultaram em maiores rendimentos de hidrólise. Os maiores rendimentos obtidos no estudo de hidrólise de celulose foram obtidos para substratos derivados do bagaço integral na concentração de ácido de 0,14%. Os resultados da quarta, relativa a obtenção de coprodutos, HMF e furfural revelou a geração de baixas concentrações desses inibidores da fermentação etanólica. De forma conclusiva, a associação dos resultados dos processos de pré-tratamentos com os resultados obtidos nas reações de hidrólise poderá ser empregada para compreender as vantagens e desvantagens de cada etapa, mostrando caminhos para um melhor aproveitamento da biomassa vegetal, em especial o bagaço de cana de açúcar. Considerando-se a produção de etanol de segunda geração, determinaram-se também as quantidades de inibidores de fermentação etanólica.
Sustainably the Brazilian sugarcane sector presents great potential for technological development of alternative…
Advisors/Committee Members: Curvelo, Antonio Aprigio da Silva.
Subjects/Keywords: Acid hydrolysis.; Biorefineries; Biorrefinaria; Hidrólise ácida; Selectivity; Seletividade
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Christofoletti, G. B. (2010). Estudo dos efeitos de etapas de pré-tratamento na hidrólise ácida de bagaço de cana-de-açúcar. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/88/88131/tde-13102010-211833/ ;
Chicago Manual of Style (16th Edition):
Christofoletti, Guilherme Bueno. “Estudo dos efeitos de etapas de pré-tratamento na hidrólise ácida de bagaço de cana-de-açúcar.” 2010. Masters Thesis, University of São Paulo. Accessed January 20, 2021.
http://www.teses.usp.br/teses/disponiveis/88/88131/tde-13102010-211833/ ;.
MLA Handbook (7th Edition):
Christofoletti, Guilherme Bueno. “Estudo dos efeitos de etapas de pré-tratamento na hidrólise ácida de bagaço de cana-de-açúcar.” 2010. Web. 20 Jan 2021.
Vancouver:
Christofoletti GB. Estudo dos efeitos de etapas de pré-tratamento na hidrólise ácida de bagaço de cana-de-açúcar. [Internet] [Masters thesis]. University of São Paulo; 2010. [cited 2021 Jan 20].
Available from: http://www.teses.usp.br/teses/disponiveis/88/88131/tde-13102010-211833/ ;.
Council of Science Editors:
Christofoletti GB. Estudo dos efeitos de etapas de pré-tratamento na hidrólise ácida de bagaço de cana-de-açúcar. [Masters Thesis]. University of São Paulo; 2010. Available from: http://www.teses.usp.br/teses/disponiveis/88/88131/tde-13102010-211833/ ;
University of Manchester
7.
Vlysidis, Anestis.
Sustainable biodiesel biorefineries for the green succinic acid production.
Degree: PhD, 2011, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/sustainable-biodiesel-biorefineries-for-the-green-succinic-acid-production(03cedd62-6e30-4719-b9ff-e6776583b733).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694243
► There is a huge global challenge to establish alternative forms of energy in order to cope with the increasing worldwide energy demand, currently based on…
(more)
▼ There is a huge global challenge to establish alternative forms of energy in order to cope with the increasing worldwide energy demand, currently based on finite fossil fuel reserves. In the transportation sector, renewable liquid fuels, such as bio-ethanol and biodiesel which are made from biomass and are substitutes for the petroleum-derived gasoline and diesel, have received increasing interest. In spite of their recent development, the biofuel industries cannot compete with conventional liquid fuels because of their higher costs. Decisive changes are required to improve their economic sustainability, such as the establishment of novel processes that utilize their by-products for the production of value-added chemicals. In this study, the bioconversion of glycerol, which is the main by-product of the biodiesel industry, to succinic acid by using the bacterium Actinobacillus succinogenes has been investigated both experimentally and computationally. Initially, the cells were adapted to accept a glycerol rich environment by performing a series of experiments. Cells from the best experiment from each run were used as inocula for the next experiment. Batch fermentations were then performed in small scale anaerobic reactors (SARs) and in lab-scale bench top reactors (B-TRs) by using the new ‘adapted’ strain. The maximum succinic acid yield, productivity and final concentration obtained from this bioprocess were found to be 1.29 g/g, 0.27 g/L/h and 29.3 g/L, respectively. Moreover, cells have also grown successfully in both synthetic and biodiesel-derived crude glycerol, indicating that it is not necessary to remove the impurities that biodiesel-derived glycerol contains. Subsequently, an unstructured model that accounts for substrate and product inhibition was developed in order to predict the behaviour of experiments starting from different initial conditions. Model predictions were found to be in good agreement with experimental data obtained for both systems (SARs and B-TRs). Batch and fed-batch systems were optimized using the developed model to obtain high succinic acid productivity. Optimization results showed that productivity increased by 31% for batch and 79% for fed-batch systems. The corresponding optimal values were computed to be equal to 0.356 g/L/h for batch and 0.488 g/L/h for fed-batch systems. A semi-mechanistic model for the fungal fermentation on solid state rapeseed meal (i.e. the other main by-product of the biodiesel industry) was also constructed for small scale tray bioreactors. This fermentation targets to increase the nutrient factor of the rapeseed meal by decomposing its macromolecules to simple compounds which can then be used as a generic medium. The developed model effectively predicts the fungal growth, the temperature fluctuations and the moisture content inside the bed and the produced extracellular enzymes that break the complex compounds of rapeseed meal (i.e. proteins) to free amino acids. The economic sustainability of biodiesel production was investigated by the construction of a…
Subjects/Keywords: 662; Integrated Biorefineries; Succinic acid; Sustainable Industries; Biofuels
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APA (6th Edition):
Vlysidis, A. (2011). Sustainable biodiesel biorefineries for the green succinic acid production. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/sustainable-biodiesel-biorefineries-for-the-green-succinic-acid-production(03cedd62-6e30-4719-b9ff-e6776583b733).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694243
Chicago Manual of Style (16th Edition):
Vlysidis, Anestis. “Sustainable biodiesel biorefineries for the green succinic acid production.” 2011. Doctoral Dissertation, University of Manchester. Accessed January 20, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/sustainable-biodiesel-biorefineries-for-the-green-succinic-acid-production(03cedd62-6e30-4719-b9ff-e6776583b733).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694243.
MLA Handbook (7th Edition):
Vlysidis, Anestis. “Sustainable biodiesel biorefineries for the green succinic acid production.” 2011. Web. 20 Jan 2021.
Vancouver:
Vlysidis A. Sustainable biodiesel biorefineries for the green succinic acid production. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2021 Jan 20].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/sustainable-biodiesel-biorefineries-for-the-green-succinic-acid-production(03cedd62-6e30-4719-b9ff-e6776583b733).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694243.
Council of Science Editors:
Vlysidis A. Sustainable biodiesel biorefineries for the green succinic acid production. [Doctoral Dissertation]. University of Manchester; 2011. Available from: https://www.research.manchester.ac.uk/portal/en/theses/sustainable-biodiesel-biorefineries-for-the-green-succinic-acid-production(03cedd62-6e30-4719-b9ff-e6776583b733).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694243
University of Lund
8.
Ravi, Krithika.
Towards bacterial valorization of low molecular weight
lignin.
Degree: 2019, University of Lund
URL: https://lup.lub.lu.se/record/00227e0c-2f7a-4c96-b53c-f4e9454c6f3a
;
https://portal.research.lu.se/ws/files/71044941/Krithika_printfile_without_papers.pdf
► Lignin is one of the major constituents in lignocellulosic biomass and is the mostabundant source of renewable aromatics on terrestrial ecosystems. The workcarried out in…
(more)
▼ Lignin is one of the major constituents in
lignocellulosic biomass and is the mostabundant source of renewable
aromatics on terrestrial ecosystems. The workcarried out in this
thesis concerns bacterial conversion of low molecular weightlignin.
This thesis is divided into three major sections, with an initial
emphasison screening and characterization of selected bacterial
species on lignin modelcompounds, followed by testing their
performance on treated lignin substrates,and finally progressing
towards strain improvement via metabolic engineering. During
screening for bacteria using samples from natural and
man-madeenvironments, Pseudomonas species were found dominant. Some
of theseisolates, and the well-known aromatic degrader –
Pseudomonas putida KT2440– were cultivated on lignin model
compounds. P. putida and Pseudomonas sp.isolate 9.1 attained
specific growth rates of about 0.21-0.27 h-1 and 0.12-0.30 h-1
respectively, on several compounds from the coniferyl, p-coumaryl
and benzoyl branches of the funnelling pathways. Meanwhile, a
contaminant was found growing on syringate plates, and was later
identified to be a bacterium belonging to the Microbacterium genus.
This Gram-positive bacterium, named RG1, was able to consume
syringate and syringaldehyde besides other aromatic compounds from
the coniferyl and p-coumaryl branches. Due to its interesting
abilities to assimilate syringyl compounds, the genome of this
strain was sequenced to identify genes involved in a putative
syringyl pathway.To assess the performance of selected bacteria on
lignin substrates, cultivationswere performed using alkaline- and
oxidatively-treated Kraft lignin. P. putida and P. fluorescens
consumed 4-HBA, vanillin, and vanillate in the complex
ligninmixture that likely contained various toxic products. In
addition, Rhodococcusopacus and Sphingobium sp. SYK-6 assimilated
guaiacol and acetovanillonerespectively, from the lignin mixture.
Interestingly, P. fluorescens was able tobreak down the higher
molecular weight lignin and produce several smallermolecules.P.
putida was selected as a host organism for genetic engineering
aimed atexpanding the range of substrates utilized. Heterologous
expression of thecytochrome P450 and oxidoreductase genes from R.
rhodochrous enabled P.putida to assimilate guaiacol – one of the
major depolymerization products fromsoftwood lignin – as the sole
carbon source. Furthermore, the identification anddeletion of an
aldehyde reductase in a P. putida strain that converts ferulate
tovanillin, increased the yield of vanillin by eliminating the
formation of vanillylalcohol as by-product.
Subjects/Keywords: Pseudomonas putida; Microbacterium sp.; Guaiacol; Syringate; Kraft lignin; Bioconversion; Biorefineries
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MLA ·
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CSE |
Export
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APA (6th Edition):
Ravi, K. (2019). Towards bacterial valorization of low molecular weight
lignin. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/00227e0c-2f7a-4c96-b53c-f4e9454c6f3a ; https://portal.research.lu.se/ws/files/71044941/Krithika_printfile_without_papers.pdf
Chicago Manual of Style (16th Edition):
Ravi, Krithika. “Towards bacterial valorization of low molecular weight
lignin.” 2019. Doctoral Dissertation, University of Lund. Accessed January 20, 2021.
https://lup.lub.lu.se/record/00227e0c-2f7a-4c96-b53c-f4e9454c6f3a ; https://portal.research.lu.se/ws/files/71044941/Krithika_printfile_without_papers.pdf.
MLA Handbook (7th Edition):
Ravi, Krithika. “Towards bacterial valorization of low molecular weight
lignin.” 2019. Web. 20 Jan 2021.
Vancouver:
Ravi K. Towards bacterial valorization of low molecular weight
lignin. [Internet] [Doctoral dissertation]. University of Lund; 2019. [cited 2021 Jan 20].
Available from: https://lup.lub.lu.se/record/00227e0c-2f7a-4c96-b53c-f4e9454c6f3a ; https://portal.research.lu.se/ws/files/71044941/Krithika_printfile_without_papers.pdf.
Council of Science Editors:
Ravi K. Towards bacterial valorization of low molecular weight
lignin. [Doctoral Dissertation]. University of Lund; 2019. Available from: https://lup.lub.lu.se/record/00227e0c-2f7a-4c96-b53c-f4e9454c6f3a ; https://portal.research.lu.se/ws/files/71044941/Krithika_printfile_without_papers.pdf
Georgia Tech
9.
Draucker, Laura Christine.
Novel Solvent Systems for the Development of Sustainable Technology.
Degree: PhD, Chemical Engineering, 2007, Georgia Tech
URL: http://hdl.handle.net/1853/16188
► Sustainable development in chemical engineering offers technical, industrially relevant solutions to environmental and economic issues. This work focuses on three specific issues; improving solvent selection…
(more)
▼ Sustainable development in chemical engineering offers technical, industrially relevant solutions to environmental and economic issues. This work focuses on three specific issues; improving solvent selection and reducing costly experimentation, improving catalyst recovery while reducing reaction time, and producing commercial viable biofuels by cost effective pretreatments and valuable side product extractions.
Novel solvent systems are a sustainable solution because they provide the ability to replace costly solvents with cheap, benign, and recyclable systems. Specifically, this work investigated the use of one novel solvent system, Gas Expanded Liquids (GXL).When a solvent is exposed to a gas in which it is miscible at modest pressures and temperatures, the liquid solvent becomes expanded, providing a unique tunable and reversible solvent with properties that can be much different then that of the solvent itself. If you apply this gas to a mixture of two liquids of a solid dissolved in a liquid phase, it can often provide a miscibility switch, aiding in separation, crystallization, and
recovery of products or catalysts. In this work several different applications for organic
solvents expanded with carbon dioxide were studied including miscibility switches for
catalyst recycle, pretreatment of biomass for improved bio-ethanol production, and
extraction of valuable chemicals from lignin waste in the pulp and paper industry. Solid
solubility models to improve solvent selection and predict unique solvent mixtures during
crystallization were also studied. The results reported here show promise for the use of
GXL novel solvent systems and solid solubility models in many sustainable applications.
Advisors/Committee Members: Dr. Charles A. Eckert (Committee Chair), Dr. Charles L. Liotta (Committee Co-Chair), Dr. Amyn S. Teja (Committee Member), Dr. Arthur J. Ragauskas (Committee Member), Dr. Wm. James Fredrick, Jr. (Committee Member).
Subjects/Keywords: Thermodynamics; Phase behavior; Biorefineries
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APA (6th Edition):
Draucker, L. C. (2007). Novel Solvent Systems for the Development of Sustainable Technology. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/16188
Chicago Manual of Style (16th Edition):
Draucker, Laura Christine. “Novel Solvent Systems for the Development of Sustainable Technology.” 2007. Doctoral Dissertation, Georgia Tech. Accessed January 20, 2021.
http://hdl.handle.net/1853/16188.
MLA Handbook (7th Edition):
Draucker, Laura Christine. “Novel Solvent Systems for the Development of Sustainable Technology.” 2007. Web. 20 Jan 2021.
Vancouver:
Draucker LC. Novel Solvent Systems for the Development of Sustainable Technology. [Internet] [Doctoral dissertation]. Georgia Tech; 2007. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1853/16188.
Council of Science Editors:
Draucker LC. Novel Solvent Systems for the Development of Sustainable Technology. [Doctoral Dissertation]. Georgia Tech; 2007. Available from: http://hdl.handle.net/1853/16188
University of Lund
10.
Bauer, Fredric.
Innovation for biorefineries – Networks, narratives, and
new institutions for the transition to a bioeconomy.
Degree: 2018, University of Lund
URL: https://lup.lub.lu.se/record/70099c07-6764-4d49-bdb3-cefcc9017447
;
https://portal.research.lu.se/ws/files/40310756/Bauer_dissertation_online.pdf
► The transition to a bioeconomy is dependent on transformative changes to technologies, organisations, and institutions, which jointly can be described as a socio-technical change. The…
(more)
▼ The transition to a bioeconomy is dependent on
transformative changes to technologies, organisations, and
institutions, which jointly can be described as a socio-technical
change. The thesis contributes to the understanding of how the
transition is shaped by expectations on and collaborations for
innovation forbiorefineries, which can produce chemicals, fuels,
and materials needed in a bioeconomy.The thesis poses three
research questions: i) what are the systemic characteristics of
innovation for biorefineries? ii) how do collaborations and
networks shape innovation for biorefineries? and iii) in what ways
are expectations and institutions shaping pathways of innovation
for biorefineries? These questions are answered with a mixed
methods approach.Reorienting the socio-technical system for
production and utilisation of chemicals, fuels, and materials
towards a bioeconomy requires the overcoming of significant
technological and institutional barriers. Though collaborations on
innovation for biorefineries are needed to combine knowledge about
technologies, materials, and markets they are costly and difficult.
Expectations on biorefineries in the bioeconomy are divergent and
conflictual. Acknowledging and resolving these conflicts is thus
key to build effective and stable partnerships, which has proven to
be difficult in the biorefinery field. Further, actors meet
barriers to local transformative innovation in the global
institutional context in which they are embedded. The thesis shows
that transition initiatives are shaped by and dependent on
institutional structures on multiple scales, but that opportunities
exist for actors to build new networks which can enable the
transition to a bioeconomy.
Subjects/Keywords: Other Chemical Engineering; bioeconomy; biorefineries; innovation; socio-technical transitions
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bauer, F. (2018). Innovation for biorefineries – Networks, narratives, and
new institutions for the transition to a bioeconomy. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/70099c07-6764-4d49-bdb3-cefcc9017447 ; https://portal.research.lu.se/ws/files/40310756/Bauer_dissertation_online.pdf
Chicago Manual of Style (16th Edition):
Bauer, Fredric. “Innovation for biorefineries – Networks, narratives, and
new institutions for the transition to a bioeconomy.” 2018. Doctoral Dissertation, University of Lund. Accessed January 20, 2021.
https://lup.lub.lu.se/record/70099c07-6764-4d49-bdb3-cefcc9017447 ; https://portal.research.lu.se/ws/files/40310756/Bauer_dissertation_online.pdf.
MLA Handbook (7th Edition):
Bauer, Fredric. “Innovation for biorefineries – Networks, narratives, and
new institutions for the transition to a bioeconomy.” 2018. Web. 20 Jan 2021.
Vancouver:
Bauer F. Innovation for biorefineries – Networks, narratives, and
new institutions for the transition to a bioeconomy. [Internet] [Doctoral dissertation]. University of Lund; 2018. [cited 2021 Jan 20].
Available from: https://lup.lub.lu.se/record/70099c07-6764-4d49-bdb3-cefcc9017447 ; https://portal.research.lu.se/ws/files/40310756/Bauer_dissertation_online.pdf.
Council of Science Editors:
Bauer F. Innovation for biorefineries – Networks, narratives, and
new institutions for the transition to a bioeconomy. [Doctoral Dissertation]. University of Lund; 2018. Available from: https://lup.lub.lu.se/record/70099c07-6764-4d49-bdb3-cefcc9017447 ; https://portal.research.lu.se/ws/files/40310756/Bauer_dissertation_online.pdf
Universidade Estadual de Campinas
11.
Junqueira, Tassia Lopes, 1985-.
Techno-economic feasibility analysis of process alternatives for ethanol production in Brazil = Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil: Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil.
Degree: 2015, Universidade Estadual de Campinas
URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266044
► Abstract: Sugarcane mills fit into the biorefinery concept, since ethanol, sugar and electricity, among others, are possible products. The first generation (1G) ethanol production, from…
(more)
▼ Abstract: Sugarcane mills fit into the biorefinery concept, since ethanol, sugar and electricity, among others, are possible products. The first generation (1G) ethanol production, from sugarcane juice, is a well-established process, while ethanol production from lignocellulosic materials, the so-called second generation (2G) process, has received special attention in the last decades. In Brazil, sugarcane bagasse and straw are potentially the most important feedstock for 2G ethanol production due to their availability and relative low cost, but the process is not established yet. This study focused on the integration of different technologies in the ethanol production process, taking into account both 1G and 2G technologies, in order to assess the impacts on techno-economic feasibility of sugarcane
biorefineries. Results showed that product diversification, through production of sugar, electricity and biogas, as well as production flexibility improve techno-economic feasibility and reduce susceptibility to market oscillations, improving business stability. For 2G ethanol production, the impacts of operating conditions on enzymatic hydrolysis and enzyme features in the integrated 1G2G ethanol production process were assessed through the formulation of a mathematical model and statistical evaluation. Aiming at the reduction of ethanol production cost, best operating conditions were determined and showed to be very sensitive to enzyme prices. Extending the operation period of sugarcane
biorefineries, which is from 6 to 8 months per year, allows reducing contribution of investment on ethanol production cost. Sweet sorghum, processed in the sugarcane off-season, presented a great potential to increase ethanol and electricity production as well as to improve economic feasibility. Integration of a 2G plant processing all year-round resulted in a promising alternative, but presents high investment cost compared to other alternatives. The approach presented in this thesis can be used to perform assessments of other routes and technologies, identifying technological bottlenecks and guiding research in order to improve process feasibility
Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Maciel Filho, Rubens, 1958- (advisor), Universidade Estadual de Campinas. Instituto de Química (institution), Programa de Pós-Graduação em Química (nameofprogram), Rossell, Carlos Eduardo Vaz (committee member), Dias, Marina Oliveira de Souza (committee member), Atala, Daniel Ibraim Pires (committee member), Tovar, Laura Plazas (committee member).
Subjects/Keywords: Biorrefinarias - Brasil; Álcool; Simulação de processos; Viabilidade econômica; Biorefineries - Brazil; Ethanol; Process simulation; Economic feasibility
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APA ·
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APA (6th Edition):
Junqueira, Tassia Lopes, 1. (2015). Techno-economic feasibility analysis of process alternatives for ethanol production in Brazil = Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil: Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/266044
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Junqueira, Tassia Lopes, 1985-. “Techno-economic feasibility analysis of process alternatives for ethanol production in Brazil = Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil: Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil.” 2015. Thesis, Universidade Estadual de Campinas. Accessed January 20, 2021.
http://repositorio.unicamp.br/jspui/handle/REPOSIP/266044.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Junqueira, Tassia Lopes, 1985-. “Techno-economic feasibility analysis of process alternatives for ethanol production in Brazil = Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil: Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil.” 2015. Web. 20 Jan 2021.
Vancouver:
Junqueira, Tassia Lopes 1. Techno-economic feasibility analysis of process alternatives for ethanol production in Brazil = Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil: Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil. [Internet] [Thesis]. Universidade Estadual de Campinas; 2015. [cited 2021 Jan 20].
Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266044.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Junqueira, Tassia Lopes 1. Techno-economic feasibility analysis of process alternatives for ethanol production in Brazil = Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil: Análise de viabilidade técnico-econômica de alternativas de processo para a produção de etanol no Brasil. [Thesis]. Universidade Estadual de Campinas; 2015. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266044
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
12.
MELLO, Nina Rosa Torres de Deus e.
Utilização da palma forrageira na produção de enzimas microbianas industriais
.
Degree: 2015, Universidade Federal de Pernambuco
URL: https://repositorio.ufpe.br/handle/123456789/17448
► A palma forrageira é uma cactácea cultivada no semiárido nordestino, capaz de se desenvolver mesmo em solos deficientes em nutrientes e água. Por ser rica…
(more)
▼ A palma forrageira é uma cactácea cultivada no semiárido nordestino, capaz de se
desenvolver mesmo em solos deficientes em nutrientes e água. Por ser rica em carboidratos,
tem um grande potencial para utilização em processos biotecnológicos para produção de
diversos bioprodutos. O objetivo deste trabalho foi investigar a utilização da palma forrageira
como substrato para a produção de enzimas microbianas de interesse industrial, em particular,
para a aplicação na hidrólise de biomassas em biorrefinarias. Cladódios de Opuntia fícusindica,
vulgarmente conhecida como palma gigante, foram fornecidos pelo Instituto
Agronômico de Pernambuco (IPA) e utilizados em todos os experimentos. Inicialmente, foi
realizado um ―screening‖ de microorganismos do gênero Bacillus, pertencentes à Coleção de
Microrganismo do Departamento de Antibióticos. O ―screening‖ foi feito com 10 linhagens,
em placas de Petri, em meio sólido contendo pó de palma seca como fonte de carbono. Entre
as 7 linhagens capazes de crescer no meio sólido, a linhagem com colônia de maior diâmetro
foi selecionada para investigação sobre a produção de enzimas celulolíticas, hemicelulolíticas
e pectinolíticas em fermentação submersa. As fermentações submersas foram realizadas com
a linhagem selecionada, Bacillussp. UFPEDA 472, e outros 3 micro-organismos:
Trichoderma reesei RUT C-30, Aspergillus awamori e Streptomyces rocheiUFPEDA 3414, já
reconhecidos como bons produtores de enzimas. A produção de atividades enzimáticas foi
investigada em frascos agitados em mesa agitadora (New Brunswick Scientific, C25KC) e em
biorreator de bancada instrumentado (New Brunswick Scientific, Bioflo110), utilizando-se o
pó e a fração péctica da palma, respectivamente. As condições de aeração e agitação do reator
foram: 1 vvm e 500 rpm, respectivamente; a temperatura e o pH foram controlados,
respectivamente, em: 30°C e 5,0, para os fungos filamentosos, 30°C e 7,0, para Bacillus sp., e
37°C e 6,0 para S. rochei. Atividades enzimáticas FPase, CMCase, xilanase e pectinase foram
determinadas durante as fermentações utilizando-se como substratos: papel de filtro Whatman
nº1, carboximetilcelulose 4%, xilana 1% e pectina cítrica 1%, respectivamente. As
concentrações de açúcares e ácido galacturônico foram realizadas por cromatografia líquida
de alta eficiência (Agilent, Série 1100). A palma e a sua fração péctica foram capazes de
induzir a produção de todas as atividades enzimáticas investigadas em T. reesei,
principalmente xilanase (7,75 UI/mL), mas baixas atividades celulolíticas foram observadas
para os outros microorganismos. Por outro lado, maiores atividades pectinolíticas foram
observadas para S. rochei e A. awamori (2,24 UI/mL e 1,84 UI/mL, respectivamente). Os
resultados levaram à conclusão de que a biomassa de cladódios da palma forrageira gigante e
a sua fração péctica são substratos potenciais para produção de enzimas – em particular, por
Trichoderma reesei RUT C30 – capazes de atuar na hidrólise de biomassas lignocelulósicas
em biorrefinarias.
Advisors/Committee Members: MAIOR, Ana Maria Souto (advisor), LIMA, Gláucia Manoella de Souza (advisor), http://lattes.cnpq.br/8393707689368881 (advisor).
Subjects/Keywords: Opuntia fícus-indica;
Celulases;
Hemicelulases;
Pectinases;
Biorrefinarias;
Opuntia ficus-indica;
Cellulases;
Hemicellulases;
Pectinases;
Biorefineries
Record Details
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APA (6th Edition):
MELLO, N. R. T. d. D. e. (2015). Utilização da palma forrageira na produção de enzimas microbianas industriais
. (Masters Thesis). Universidade Federal de Pernambuco. Retrieved from https://repositorio.ufpe.br/handle/123456789/17448
Chicago Manual of Style (16th Edition):
MELLO, Nina Rosa Torres de Deus e. “Utilização da palma forrageira na produção de enzimas microbianas industriais
.” 2015. Masters Thesis, Universidade Federal de Pernambuco. Accessed January 20, 2021.
https://repositorio.ufpe.br/handle/123456789/17448.
MLA Handbook (7th Edition):
MELLO, Nina Rosa Torres de Deus e. “Utilização da palma forrageira na produção de enzimas microbianas industriais
.” 2015. Web. 20 Jan 2021.
Vancouver:
MELLO NRTdDe. Utilização da palma forrageira na produção de enzimas microbianas industriais
. [Internet] [Masters thesis]. Universidade Federal de Pernambuco; 2015. [cited 2021 Jan 20].
Available from: https://repositorio.ufpe.br/handle/123456789/17448.
Council of Science Editors:
MELLO NRTdDe. Utilização da palma forrageira na produção de enzimas microbianas industriais
. [Masters Thesis]. Universidade Federal de Pernambuco; 2015. Available from: https://repositorio.ufpe.br/handle/123456789/17448
13.
CRUZ FILHO, Iranildo Jose da.
Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
.
Degree: 2016, Universidade Federal de Pernambuco
URL: http://repositorio.ufpe.br/handle/123456789/17772
► Considerada um importante produto comercial, a madeira de eucalipto está disponível no território brasileiro de maneira sustentável e em grandes quantidades, fornecendo produtos bastante valorizados…
(more)
▼ Considerada um importante produto comercial, a madeira de eucalipto está disponível no território brasileiro de maneira sustentável e em grandes quantidades, fornecendo produtos bastante valorizados no mercado. Atualmente o país é um dos maiores produtores de celulose proveniente das florestas de eucalipto. A lignina, depois da celulose, é o segundo mais abundante biopolímero encontrado na natureza e apresenta diversas aplicações estando inserida no conceito de biorrefinaria. O presente trabalho teve como objetivo a separação dos principais componentes do cavaco de eucalipto. Além de avaliar o efeito do pré-tratamento hidrotérmico seguido de deslignificação alcalina na biomassa, visando à obtenção de um material lignocelulósico mais facilmente hidrolisável por enzimas celulolíticas. Os pré-tratamentos foram realizados em um reator rotatório de 20 L (Regmed AU/E-20), relação sólido: líquido 1:10 (m·v-1). A eficiência dos pré-tratamentos foi verificada através da comparação de análises físico-químicas e da conversão de celulose em glicose na madeira “in natura” e pré-tratada. Os cavacos de eucalipto utilizados, foram caracterizados quimicamente e analisados por microscopia eletrônica de varredura (MEV), espectroscopia de infravermelho por transformada de fourier (FT-IR), cromatografia líquida de alta eficiência (CLAE) e difração de raios-X (DRX). Para avaliação da conversão enzimática, utilizou-se 15 FPU·g-1 de celulase e 10 UI·g-1 de β-glicosidase em tampão Citrato de sódio 0,05 mol·L-1, pH 4,8 sob agitação de 150 rpm, temperatura de 50 ºC e relação sólido: líquido 2% (m·v-1). A lignina obtida na deslignificação, foi precipitada com ácido sulfúrico até pH 2 em temperatura ambiente. A reação foi mantida sem agitação por 12h. Em seguida o precipitado foi seco, acetilado e caracterizado pelas técnicas: espectroscopia de infravermelho por transformada de Fourier (FT-IR), ressonância nuclear magnética (RMN de 1H e 13C), espectroeletrônica na região do ultravioleta UV/Vis, análise elementar e microscopia eletrônica de varredura (MEV). Os resultados obtidos mostraram que a hemicelulose foi o componente que sofreu maior solubilização, 93%. Após a deslignificação alcalina o teor de celulose e lignina na fração sólida diminuram em 35,96% e 82% respectivamente, esses valores correspondem a solubilização das macromoléculas quando comparadas a biomassa “in natura”. As análises químicas comprovaram que ao decorrer do processo ocorreu aumento no índice de cristalinidade da celulose, devido a remoção de hemicelulose e lignina. A hidrólise dos cavacos deslignificados confirmou a eficiência dos pré-tratamentos, uma vez que a conversão de celulose em glicose foi de 65% indicando que quantidades menores de hemicelulose e lignina favorecem o processo de hidrólise. As técnicas de FT-IR e RMN demonstraram efetividade da reação acetilação. Através da análise elementar e de RMN foi possível obter a expressão para a fórmula mínima C9 sendo: C9H11O4,8(OCH3)1,37. O percentual de unidades guaiacila na madeira é de 63%. O Espectros de UV/Vis…
Advisors/Committee Members: ROCHA, George Jackson de Moraes (advisor), SOUTO MAIOR, Ana Maria (advisor), http://lattes.cnpq.br/0201432253454830 (advisor).
Subjects/Keywords: Eucalyptus urograndis;
Lignina;
Pré-tratamento;
Caracterização química;
Biorrefinarias;
Eucalyptus urograndis;
Lignin;
pretreatment;
chemical characterization;
biorefineries
Record Details
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Cite
Share »
Record Details
Similar Records
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
CRUZ FILHO, I. J. d. (2016). Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
. (Thesis). Universidade Federal de Pernambuco. Retrieved from http://repositorio.ufpe.br/handle/123456789/17772
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
CRUZ FILHO, Iranildo Jose da. “Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
.” 2016. Thesis, Universidade Federal de Pernambuco. Accessed January 20, 2021.
http://repositorio.ufpe.br/handle/123456789/17772.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
CRUZ FILHO, Iranildo Jose da. “Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
.” 2016. Web. 20 Jan 2021.
Vancouver:
CRUZ FILHO IJd. Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
. [Internet] [Thesis]. Universidade Federal de Pernambuco; 2016. [cited 2021 Jan 20].
Available from: http://repositorio.ufpe.br/handle/123456789/17772.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
CRUZ FILHO IJd. Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
. [Thesis]. Universidade Federal de Pernambuco; 2016. Available from: http://repositorio.ufpe.br/handle/123456789/17772
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
14.
CRUZ FILHO, Iranildo Jose da.
Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
.
Degree: 2016, Universidade Federal de Pernambuco
URL: https://repositorio.ufpe.br/handle/123456789/17763
► Considerada um importante produto comercial, a madeira de eucalipto está disponível no território brasileiro de maneira sustentável e em grandes quantidades, fornecendo produtos bastante valorizados…
(more)
▼ Considerada um importante produto comercial, a madeira de eucalipto está disponível no território brasileiro de maneira sustentável e em grandes quantidades, fornecendo produtos bastante valorizados no mercado. Atualmente o país é um dos maiores produtores de celulose proveniente das florestas de eucalipto. A lignina, depois da celulose, é o segundo mais abundante biopolímero encontrado na natureza e apresenta diversas aplicações estando inserida no conceito de biorrefinaria. O presente trabalho teve como objetivo a separação dos principais componentes do cavaco de eucalipto. Além de avaliar o efeito do pré-tratamento hidrotérmico seguido de deslignificação alcalina na biomassa, visando à obtenção de um material lignocelulósico mais facilmente hidrolisável por enzimas celulolíticas. Os pré-tratamentos foram realizados em um reator rotatório de 20 L (Regmed AU/E-20), relação sólido: líquido 1:10 (m·v-1). A eficiência dos pré-tratamentos foi verificada através da comparação de análises físico-químicas e da conversão de celulose em glicose na madeira “in natura” e pré-tratada. Os cavacos de eucalipto utilizados, foram caracterizados quimicamente e analisados por microscopia eletrônica de varredura (MEV), espectroscopia de infravermelho por transformada de fourier (FT-IR), cromatografia líquida de alta eficiência (CLAE) e difração de raios-X (DRX). Para avaliação da conversão enzimática, utilizou-se 15 FPU·g-1 de celulase e 10 UI·g-1 de β-glicosidase em tampão Citrato de sódio 0,05 mol·L-1, pH 4,8 sob agitação de 150 rpm, temperatura de 50 ºC e relação sólido: líquido 2% (m·v-1). A lignina obtida na deslignificação, foi precipitada com ácido sulfúrico até pH 2 em temperatura ambiente. A reação foi mantida sem agitação por 12h. Em seguida o precipitado foi seco, acetilado e caracterizado pelas técnicas: espectroscopia de infravermelho por transformada de Fourier (FT-IR), ressonância nuclear magnética (RMN de 1H e 13C), espectroeletrônica na região do ultravioleta UV/Vis, análise elementar e microscopia eletrônica de varredura (MEV). Os resultados obtidos mostraram que a hemicelulose foi o componente que sofreu maior solubilização, 93%. Após a deslignificação alcalina o teor de celulose e lignina na fração sólida diminuram em 35,96% e 82% respectivamente, esses valores correspondem a solubilização das macromoléculas quando comparadas a biomassa “in natura”. As análises químicas comprovaram que ao decorrer do processo ocorreu aumento no índice de cristalinidade da celulose, devido a remoção de hemicelulose e lignina. A hidrólise dos cavacos deslignificados confirmou a eficiência dos pré-tratamentos, uma vez que a conversão de celulose em glicose foi de 65% indicando que quantidades menores de hemicelulose e lignina favorecem o processo de hidrólise. As técnicas de FT-IR e RMN demonstraram efetividade da reação acetilação. Através da análise elementar e de RMN foi possível obter a expressão para a fórmula mínima C9 sendo: C9H11O4,8(OCH3)1,37. O percentual de unidades guaiacila na madeira é de 63%. O Espectros de UV/Vis…
Advisors/Committee Members: ROCHA, George Jackson de Moraes (advisor), SOUTO-MAIOR, Ana Maria (advisor), http://lattes.cnpq.br/0201432253454830 (advisor).
Subjects/Keywords: Eucalyptus urograndis;
Lignina;
Pré-tratamento;
Caracterização química;
Biorrefinarias;
Eucalyptus urograndis;
Lignin;
pretreatment;
chemical characterization;
biorefineries
Record Details
Similar Records
Cite
Share »
Record Details
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Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
CRUZ FILHO, I. J. d. (2016). Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
. (Thesis). Universidade Federal de Pernambuco. Retrieved from https://repositorio.ufpe.br/handle/123456789/17763
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
CRUZ FILHO, Iranildo Jose da. “Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
.” 2016. Thesis, Universidade Federal de Pernambuco. Accessed January 20, 2021.
https://repositorio.ufpe.br/handle/123456789/17763.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
CRUZ FILHO, Iranildo Jose da. “Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
.” 2016. Web. 20 Jan 2021.
Vancouver:
CRUZ FILHO IJd. Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
. [Internet] [Thesis]. Universidade Federal de Pernambuco; 2016. [cited 2021 Jan 20].
Available from: https://repositorio.ufpe.br/handle/123456789/17763.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
CRUZ FILHO IJd. Separação dos principais componentes do cavaco de eucalipto, hidrólise enzimática da celulose e caracterização das frações obtidas
. [Thesis]. Universidade Federal de Pernambuco; 2016. Available from: https://repositorio.ufpe.br/handle/123456789/17763
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
15.
Evers, M.P.M.
How does knowledge development and diffusion influence the innovation system of biorefinery technologies?.
Degree: 2014, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/290214
► Biorefineries have the potential of becoming an important in the future European energy and production system. They can contributes to policy objectives on climate change,…
(more)
▼ Biorefineries have the potential of becoming an important in the future European energy and production system. They can contributes to policy objectives on climate change, energy security and green growth as it is the only C-rich material besides of fossil resources. However, the large potential of
biorefineries does not automatically lead to a large share of
biorefineries in future energy and production systems. Recent insights in innovation studies suggest that the success chances of technological innovations are to a large extent determined by the innovation system, the systems that develops, commercializes and diffuses technology.
The influence of network formation on the innovation system of biochemical biomass conversion technologies for
biorefineries are analysed in this research. A TIS approach combined with methods from social network analysis is used to analyse knowledge development and diffusion in the period between 2002 and 2013 in joint European research projects in the sixth and seventh framework projects. The focus is on how these two key innovation processes influence the innovation system with the objective to gain insight in the dynamics of these two innovation processes and to analyse the relationship between the structure of the system in terms of its components and the functioning of the system in terms of its key innovation processes.
Based on this analysis, a number of interaction patterns for the development and diffusion of knowledge with other important innovation processes were found. These two functions fulfil important roles in young innovation systems, but in order for the system to move to the next phase, the presence of favourable markets seems to be a key requirement. This research emphasized the importance of network formation. The structure of these networks is an important determinant for the flow of knowledge through the networks. Next to facilitating knowledge flows, networks fulfil other important function in emerging innovation systems: they enable organisations to attract human capital and granted certain key actors power to influence the direction of future developments.
Advisors/Committee Members: Negro, Simona, Kwant, Kees.
Subjects/Keywords: Innovation Systems; Biobased Economy; Biorefineries
…conversion routes in
biorefineries (Faaij, 2006; Brethauer & Wyman, 2010). The level of… …biorefineries. A short historical description of the events that resulted in the emerging innovation… …current status of industrialisation of biorefineries
The use of biomass for energy and fuels… …legislation during the beginning of the 21th century, pushing the development of
biorefineries… …globally. The World Economic Forum blames this in their report on the future of biorefineries on…
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Evers, M. P. M. (2014). How does knowledge development and diffusion influence the innovation system of biorefinery technologies?. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/290214
Chicago Manual of Style (16th Edition):
Evers, M P M. “How does knowledge development and diffusion influence the innovation system of biorefinery technologies?.” 2014. Masters Thesis, Universiteit Utrecht. Accessed January 20, 2021.
http://dspace.library.uu.nl:8080/handle/1874/290214.
MLA Handbook (7th Edition):
Evers, M P M. “How does knowledge development and diffusion influence the innovation system of biorefinery technologies?.” 2014. Web. 20 Jan 2021.
Vancouver:
Evers MPM. How does knowledge development and diffusion influence the innovation system of biorefinery technologies?. [Internet] [Masters thesis]. Universiteit Utrecht; 2014. [cited 2021 Jan 20].
Available from: http://dspace.library.uu.nl:8080/handle/1874/290214.
Council of Science Editors:
Evers MPM. How does knowledge development and diffusion influence the innovation system of biorefinery technologies?. [Masters Thesis]. Universiteit Utrecht; 2014. Available from: http://dspace.library.uu.nl:8080/handle/1874/290214
16.
De Meester, Steven.
Life cycle assessment in biorefineries : case studies and methodological development.
Degree: 2013, Ghent University
URL: http://hdl.handle.net/1854/LU-3210428
► Fossil resources are gradually depleting and becoming more expensive. Therefore, new ways to fuel our economy should be sought. Being a renewable carbon source, biomass…
(more)
▼ Fossil resources are gradually depleting and becoming more expensive. Therefore, new ways to fuel our economy should be sought. Being a renewable carbon source, biomass will take a key role in the transition to a more sustainable economy. However, while potentially renewable, biomass relies on an intensive cultivation step and it will not be able to deliver a constant and endless supply without inducing other harmful effects. Therefore sustainability assessments of
biorefineries are highly relevant.
After an introductory first chapter, the sustainability concept and assessment methodologies are studied in chapter two. Based on this information, the life cycle framework is applied in chapter three, in which it is shown that a food and feed company processing wheat can switch to a fossil fuel replacing biorefinery without inducing efficiency losses. On the other hand, the replacement of fossil fuels goes at the cost of other resources such as land, water, minerals, etc. A profound study of the supply chain of different sources of biomass illustrates that the valorization of domestic organic waste and farm residues is an environmentally benign opportunity. These types of biomass however, have lower conversion efficiencies compared to agricultural crops such as silage maize because they often contain more difficult molecules to process such as lignocelluloses requiring more pre- and post-treatment. It is demonstrated that these different types of organic resources can be efficiently converted to a highly energetic biomethane by anaerobic digestion while maintaining nutrients in the digestate, which can be used as fertilizer. Additional emissions causing acidification and eutrophication should however be avoided by good agricultural management.
The fourth chapter of this dissertation focuses on methodological development. The quantification of sustainability is a complex task and therefore more research is required to improve assessment techniques. A first identified bottleneck is the acquirement of reliable data. While this is the key to obtain useful results from a life cycle study, it is especially difficult to gather mass and energy balances of future production processes. For this purpose, engineering modules are developed of 22 processes that are commonly used in industry which can be used in prospective sustainability assessments. Although challenges are identified, an application in a case study illustrated the operability and reliability of the approach. The second part of this chapter focuses on the allocation procedure of LCA. It is illustrated that this methodological attribute should be linked to the goal and scope of the assessment. System expansion can give interesting insights in economy wide assessments to assess different product mixes and markets, whereas partitioning is a useful approach in product policies and supply chain improvement. For the latter, exergy is identified as a useful parameter to quantify the physical value of both mass and energy. In a last part of the methodological chapter, an…
Advisors/Committee Members: Dewulf, Jo.
Subjects/Keywords: Earth and Environmental Sciences; Agriculture; Biomass; Biorefineries; Life Cycle Assessment; Sustainable development
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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APA (6th Edition):
De Meester, S. (2013). Life cycle assessment in biorefineries : case studies and methodological development. (Thesis). Ghent University. Retrieved from http://hdl.handle.net/1854/LU-3210428
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
De Meester, Steven. “Life cycle assessment in biorefineries : case studies and methodological development.” 2013. Thesis, Ghent University. Accessed January 20, 2021.
http://hdl.handle.net/1854/LU-3210428.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
De Meester, Steven. “Life cycle assessment in biorefineries : case studies and methodological development.” 2013. Web. 20 Jan 2021.
Vancouver:
De Meester S. Life cycle assessment in biorefineries : case studies and methodological development. [Internet] [Thesis]. Ghent University; 2013. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1854/LU-3210428.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
De Meester S. Life cycle assessment in biorefineries : case studies and methodological development. [Thesis]. Ghent University; 2013. Available from: http://hdl.handle.net/1854/LU-3210428
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Louisiana State University
17.
Salas Ortiz, Santiago David.
Extensive Sensitivity Analysis and Parallel Stochastic Global Optimization Using Radial Basis Functions of Integrated Biorefineries under Operational Level Uncertainties.
Degree: MSChE, Chemical Engineering, 2016, Louisiana State University
URL: etd-04052016-185104
;
https://digitalcommons.lsu.edu/gradschool_theses/2284
► This work presents a decision-making framework for global optimization of detailed renewable energy processes considering technological uncertainty. The critical uncertain sources are identified with an…
(more)
▼ This work presents a decision-making framework for global optimization of detailed renewable energy processes considering technological uncertainty. The critical uncertain sources are identified with an efficient computational method for global sensitivity analysis, and are obtained in two different ways, simultaneously and independently per product pathway respect to the objective function. For global optimization, the parallel stochastic response surface method developed by Regis & Shoemaker (2009) is employed. This algorithm is based on the multi-start local metric stochastic response surface method explored by the same authors (2007a). The aforementioned algorithm uses as response surface model a radial basis function (RBF) for approximating the expensive simulation model. Once the RBF’s parameters are fitted, the algorithm selects multiple points to be evaluated simultaneously. The next point(s) to be evaluated in the expensive simulation are obtained based on their probability to attain a better result for the objective function. This approach represents a simplified oriented search. To evaluate the efficacy of this novel decision-making framework, a hypothetical multiproduct lignocellulosic biorefinery is globally optimized on its operational level. The obtained optimal points are compared with traditional optimization methods, e.g. Monte-Carlo simulation, and are evaluated for both proposed types of uncertainty calculated.
Subjects/Keywords: Integrated biorefineries; Renewables; Uncertainty analysis; Technological uncertainty; Radial basis functions; Surrogate models; Global optimization
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Salas Ortiz, S. D. (2016). Extensive Sensitivity Analysis and Parallel Stochastic Global Optimization Using Radial Basis Functions of Integrated Biorefineries under Operational Level Uncertainties. (Masters Thesis). Louisiana State University. Retrieved from etd-04052016-185104 ; https://digitalcommons.lsu.edu/gradschool_theses/2284
Chicago Manual of Style (16th Edition):
Salas Ortiz, Santiago David. “Extensive Sensitivity Analysis and Parallel Stochastic Global Optimization Using Radial Basis Functions of Integrated Biorefineries under Operational Level Uncertainties.” 2016. Masters Thesis, Louisiana State University. Accessed January 20, 2021.
etd-04052016-185104 ; https://digitalcommons.lsu.edu/gradschool_theses/2284.
MLA Handbook (7th Edition):
Salas Ortiz, Santiago David. “Extensive Sensitivity Analysis and Parallel Stochastic Global Optimization Using Radial Basis Functions of Integrated Biorefineries under Operational Level Uncertainties.” 2016. Web. 20 Jan 2021.
Vancouver:
Salas Ortiz SD. Extensive Sensitivity Analysis and Parallel Stochastic Global Optimization Using Radial Basis Functions of Integrated Biorefineries under Operational Level Uncertainties. [Internet] [Masters thesis]. Louisiana State University; 2016. [cited 2021 Jan 20].
Available from: etd-04052016-185104 ; https://digitalcommons.lsu.edu/gradschool_theses/2284.
Council of Science Editors:
Salas Ortiz SD. Extensive Sensitivity Analysis and Parallel Stochastic Global Optimization Using Radial Basis Functions of Integrated Biorefineries under Operational Level Uncertainties. [Masters Thesis]. Louisiana State University; 2016. Available from: etd-04052016-185104 ; https://digitalcommons.lsu.edu/gradschool_theses/2284
18.
Tsakalova, Marinella.
Ολοκληρωμένα υπολογιστικά συστήματα σύνθεσης και αξιοποίησης βιομάζας σε βιοδιυλιστηριακές εφαρμογές.
Degree: 2016, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)
URL: http://hdl.handle.net/10442/hedi/39532
► Extended AbstractBiomass is a carbon based renewable source with perspectives to cover the needs of energy and chemical production, minimizing the environmental impact and the…
(more)
▼ Extended AbstractBiomass is a carbon based renewable source with perspectives to cover the needs of energy and chemical production, minimizing the environmental impact and the dependence on conventional petrochemical raw materials. Industrial biomass processing plants, biorefineries, form a new industrial sector with a significant impact on chemical and fuel market. The aim of biorefinery units is the optimal use of resources and the reduction of waste to maximize the benefits and profitability. The concept starts from 1rst generation biorefineries to replace conventional fuels with biofuels and progressively shift to those of second and third generation with the perspective of parallel chemical and fuel production and the use of non-food biomass.The ‘green growth’ is estimated to $300-400 billion with the bio based chemical production accounting for 10 percent of the worldwide annual chemical market, whereas the potential for GHG reductions ranges from 60% to 100%. The design of biorefineries from pilots and installed facilities bears tremendous social and economic benefits. By 2020, only in Europe, there would be around 1,000 of new units bringing €32.3 trillion revenues and 1 million new jobs.Biorefineries seem to be a prerequisite for sustainability. However, their feasibility is not obvious. The development of biorefineries is a multifaceted problem with many options to be evaluated. The options include (i) biomass availability in many different forms (compositions, seasonality, availability), (ii) processing technologies (thermochemical, biochemical, conventional, conversions, yields, type of catalysts and enzymes, pressure, temperature) and (iii) a wide range of intermediates and chemical products (fuels, products, by-products, market needs). These options are linked to different degrees of freedom increasing the complexity of the problem. The development of biorefineries formulate a highthroughput problem where the evaluation of options and solutions requires a systemic synthesis method. However, literature is basically focused on simulations of bioprocesses with a few synthesis efforts formed around specific problems, inadequate for the simultaneous analysis of many options and generalization of problems.The thesis outline the development of a systems methodology for the assessment and optimization of integrated biorefineries. The systematic approach renders generalization in high-throughput capacity. Generalization has been exploited to review large combinations of different feedstock, alternative technologies, energy and chemical products. For the development of the methodology, a synthesis CPB (Compartmental Processing Blocks) unit is introduced, as conceptual structural unit correlating input and output streams of a conversion step. The representations of CPB uses a bipartite graph with discrete data for raw materials, intermediates and finished products. The proposed graph is used to develop biomass value chain (simple representation) and potential biorefinery systems – superstructure (advanced…
Subjects/Keywords: Σύνθεση διεργασιών; Ολοκλήρωση; Βιοδιυλιστήρια; Βελτιστοποίηση; Βιομάζα; Process synthesis; Integration; Biorefineries; Optimization; Biomass
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APA (6th Edition):
Tsakalova, M. (2016). Ολοκληρωμένα υπολογιστικά συστήματα σύνθεσης και αξιοποίησης βιομάζας σε βιοδιυλιστηριακές εφαρμογές. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/39532
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tsakalova, Marinella. “Ολοκληρωμένα υπολογιστικά συστήματα σύνθεσης και αξιοποίησης βιομάζας σε βιοδιυλιστηριακές εφαρμογές.” 2016. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed January 20, 2021.
http://hdl.handle.net/10442/hedi/39532.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tsakalova, Marinella. “Ολοκληρωμένα υπολογιστικά συστήματα σύνθεσης και αξιοποίησης βιομάζας σε βιοδιυλιστηριακές εφαρμογές.” 2016. Web. 20 Jan 2021.
Vancouver:
Tsakalova M. Ολοκληρωμένα υπολογιστικά συστήματα σύνθεσης και αξιοποίησης βιομάζας σε βιοδιυλιστηριακές εφαρμογές. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2016. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10442/hedi/39532.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tsakalova M. Ολοκληρωμένα υπολογιστικά συστήματα σύνθεσης και αξιοποίησης βιομάζας σε βιοδιυλιστηριακές εφαρμογές. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2016. Available from: http://hdl.handle.net/10442/hedi/39532
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Lund
19.
Almqvist, Henrik.
Dicarboxylic acids from xylose, using natural and
engineered hosts.
Degree: 2017, University of Lund
URL: https://lup.lub.lu.se/record/91a6bda6-85ce-45c2-89dc-5c4292eacff6
;
https://portal.research.lu.se/ws/files/35618851/Henrik_Almqvist_2018.pdf
► Chemical building blocks for plastics can be produced from renewable biomass feedstocks using microbial production organisms, such as yeast or bacteria, in a biorefinery. One…
(more)
▼ Chemical building blocks for plastics can be
produced from renewable biomass feedstocks using microbial
production organisms, such as yeast or bacteria, in a biorefinery.
One class of chemical building blocks that are suitable for
production of biobased and biodegradable plastics are dicarboxylic
acids, e.g. succinic acid. In order to avoid competition with food
and feed production it is desirable to use hydrolysates of
lignocellulosic feedstocks which often not only contain hexose
sugars but also pentoses, out of which xylose is the most common.
One example of such a feedstock is spent sulphite liquor (SSL), a
side stream from sulphite pulping of Eucalyptus, which is rich in
xylose. In this thesis, microbial production of dicarboxylic acids
from xylose-rich feedstocks has been studied using different host
organisms. The natural succinic acid producing bacterium
Actinobacillus succinogenes was found able to produce succinate
from a xylose rich synthetic model medium mimicking sugar com-
position in SSL, at a titer of 31 g L-1 and yield of 0.71 g g-1. In
addition, A. succinogenes was tested for tolerance towards
inhibiting by-products along with a related succinate producer,
Basfia succiniciproducens. Of the by-products, both organisms were
found to be most sensitive to formate (18-22 g L-1), while high
concentration of acetate (38 g L-1) and succinate (55 g L-1) were
tolerated. Succinate production with A. succinogenes was also
tested in SSL, and titers above 22 g L-1 of succinate were obtained
in fed-batch cultivations. A strain of Saccharomyces cerevisiae
engineered for xylose utilization and formation of dicarboxylic
acids was assessed and found rather tolerant to SSL even at acidic
condi- tions. The relative distribution between malate and
succinate was affected by cultivation conditions, with succinate
strongly favoured at carboxylating conditions at high pH. Genes
encoding enzymes of the Weimberg pathway, an orthogonal xylose
degradation pathway, were introduced in S. cerevisiae. The complete
pathway was not functional and growth on xylose was not obtained.
However, the intermediate compound xylonate was formed at close to
stoichiometric yields. In addition, Caulobacter crescentus, the
natural host of the Weimberg pathway, was characterised. Activity
of the Weimberg pathway was found during growth on both xylose and
arabinose, but not on glucose. Interestingly, high yields of
α-ketoglutarate (up to 0.43 g g-1) were formed during growth on
xylose.
Subjects/Keywords: Engineering and Technology; Xylose; Dicarboxylic Acids; Biorefineries; Actinobacillus succinogenes; Basfia succiniciproducens; Saccharomyces cerevisiae; Caulobacter crescentus
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APA ·
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MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Almqvist, H. (2017). Dicarboxylic acids from xylose, using natural and
engineered hosts. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/91a6bda6-85ce-45c2-89dc-5c4292eacff6 ; https://portal.research.lu.se/ws/files/35618851/Henrik_Almqvist_2018.pdf
Chicago Manual of Style (16th Edition):
Almqvist, Henrik. “Dicarboxylic acids from xylose, using natural and
engineered hosts.” 2017. Doctoral Dissertation, University of Lund. Accessed January 20, 2021.
https://lup.lub.lu.se/record/91a6bda6-85ce-45c2-89dc-5c4292eacff6 ; https://portal.research.lu.se/ws/files/35618851/Henrik_Almqvist_2018.pdf.
MLA Handbook (7th Edition):
Almqvist, Henrik. “Dicarboxylic acids from xylose, using natural and
engineered hosts.” 2017. Web. 20 Jan 2021.
Vancouver:
Almqvist H. Dicarboxylic acids from xylose, using natural and
engineered hosts. [Internet] [Doctoral dissertation]. University of Lund; 2017. [cited 2021 Jan 20].
Available from: https://lup.lub.lu.se/record/91a6bda6-85ce-45c2-89dc-5c4292eacff6 ; https://portal.research.lu.se/ws/files/35618851/Henrik_Almqvist_2018.pdf.
Council of Science Editors:
Almqvist H. Dicarboxylic acids from xylose, using natural and
engineered hosts. [Doctoral Dissertation]. University of Lund; 2017. Available from: https://lup.lub.lu.se/record/91a6bda6-85ce-45c2-89dc-5c4292eacff6 ; https://portal.research.lu.se/ws/files/35618851/Henrik_Almqvist_2018.pdf
20.
Oliveira, Fernanda de Carvalho.
Oxidação de lignina proveniente de resíduos lignocelulósicos agroindustriais para obtenção de compostos químicos aromáticos de maior valor agregado.
Degree: PhD, Conversão de Biomassa, 2015, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/97/97131/tde-05082015-153217/
;
► A exploração de processos viáveis para a conversão da biomassa lignocelulósica em combustíveis limpos e produtos químicos de alto valor agregado, para complementar ou substituir…
(more)
▼ A exploração de processos viáveis para a conversão da biomassa lignocelulósica em combustíveis limpos e produtos químicos de alto valor agregado, para complementar ou substituir produtos derivados de fontes não renováveis, é crucial para um desenvolvimento sustentável. A valorização e modificação dos componentes lignocelulósicos, torna-se imprescindível para viabilizar o sistema de biorrefinaria. A lignina, macromolécula aromática dominante na natureza, é um destes componentes que, devido a sua estrutura e composição, oferece rotas únicas para a produção de vários químicos de valor agregado. Este trabalho tem como objetivo avaliar o efeito de reações de oxidação em ligninas de bagaço e de palha de cana-de-açúcar, e de casca de café, na obtenção de compostos aromáticos de baixa massa molar, em especial a vanilina, e adicionalmente, verificar a aplicabilidade da lignina oxidada residual na obtenção de matrizes para liberação controlada de herbicida, buscando alternativas para agregar valor à lignina proveniente de resíduos agroindustriais e contribuir com a viabilização de biorrefinarias. Para isso, os materiais lignocelulósicos foram pré-tratados com ácido diluído e submetidos a deslignificação alcalina para obtenção da lignina. As frações obtidas durante cada etapa foram avaliadas quanto a composição química e Espectrometria no Infravermelho (FTIR), e as ligninas obtidas, foram ainda avaliadas por Espectrometria no Ultravioleta (UV) e por Ressonância Magnética Nuclear (1H RMN, 13C RMN e 2D RMN). As ligninas obtidas foram oxidadas em diferentes condições: oxidação enzimática utilizando lacase, em meio ácido e em meio alcalino com H2O2 e oxidação úmida em meio aquoso e alcalino utilizando H2O2. A fração líquida obtida foi analisada por Cromatografia Líquida de Alta Eficiência (CLAE) para identificar e quantificar os aldeídos aromáticos e outros compostos de degradação, enquanto a fração sólida, constituída pela lignina residual oxidada, foi avaliada por FTIR e UV. As ligninas oxidadas provenientes das condições que resultaram em um maior rendimento de vanilina, foram aplicadas na formulação de matrizes para liberação controlada de ametrina. Os resultados mostraram que a lignina de bagaço e de palha de cana não oxidadas são compostas principalmente por unidades siringil e guaiacil, respectivamente, e predominância de ligações ?-O-4, enquanto a lignina de casca de café foi composta principalmente por unidades hidroxil e predominância de ligações C-C, indicando uma estrutura mais condensada. Das oxidações avaliadas, a oxidação em meio alcalino (NaOH 10%) utilizando H2O2 9,1% gerou um maior rendimento de vanilina quando utilizada lignina de bagaço (8,13 mg/g lignina) e de casca de café (1,15 mg/g lignina), e H2O2 6,1% quando utilizada lignina de palha (6,48 mg/g lignina). A aplicação das ligninas oxidadas permitiu a obtenção de matrizes capazes de liberar o herbicida ametrina com diferentes cinéticas, dependendo das propriedades e das proporções das ligninas empregadas.
The exploration of feasible paths for the…
Advisors/Committee Members: Gonçalves, Adilson Roberto.
Subjects/Keywords: Agroindustrial waste; Biorefineries,; Biorrefinarias; Compostos de baixa massa molar; Lignin oxidation; Low molecular weight compounds; Oxidação de lignina; Resíduos agroindustriais
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APA ·
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CSE |
Export
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APA (6th Edition):
Oliveira, F. d. C. (2015). Oxidação de lignina proveniente de resíduos lignocelulósicos agroindustriais para obtenção de compostos químicos aromáticos de maior valor agregado. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/97/97131/tde-05082015-153217/ ;
Chicago Manual of Style (16th Edition):
Oliveira, Fernanda de Carvalho. “Oxidação de lignina proveniente de resíduos lignocelulósicos agroindustriais para obtenção de compostos químicos aromáticos de maior valor agregado.” 2015. Doctoral Dissertation, University of São Paulo. Accessed January 20, 2021.
http://www.teses.usp.br/teses/disponiveis/97/97131/tde-05082015-153217/ ;.
MLA Handbook (7th Edition):
Oliveira, Fernanda de Carvalho. “Oxidação de lignina proveniente de resíduos lignocelulósicos agroindustriais para obtenção de compostos químicos aromáticos de maior valor agregado.” 2015. Web. 20 Jan 2021.
Vancouver:
Oliveira FdC. Oxidação de lignina proveniente de resíduos lignocelulósicos agroindustriais para obtenção de compostos químicos aromáticos de maior valor agregado. [Internet] [Doctoral dissertation]. University of São Paulo; 2015. [cited 2021 Jan 20].
Available from: http://www.teses.usp.br/teses/disponiveis/97/97131/tde-05082015-153217/ ;.
Council of Science Editors:
Oliveira FdC. Oxidação de lignina proveniente de resíduos lignocelulósicos agroindustriais para obtenção de compostos químicos aromáticos de maior valor agregado. [Doctoral Dissertation]. University of São Paulo; 2015. Available from: http://www.teses.usp.br/teses/disponiveis/97/97131/tde-05082015-153217/ ;
University of Maine
21.
Paredes Heller, Juan Jacobo.
The Influence of Hot Water Extraction on Physical and Mechanical Properties of OSB.
Degree: PhD, Forest Resources, 2009, University of Maine
URL: https://digitalcommons.library.umaine.edu/etd/413
► The finite reserves of petroleum are driving renewed interest in technologies that allow for sustainable production of energy. There are a wide variety of…
(more)
▼ The finite reserves of petroleum are driving renewed interest in technologies that allow for sustainable production of energy. There are a wide variety of technologies with well-developed infrastructure like the oriented strand board (OSB) industry, which could be used as launch point for developing
biorefineries. The effects of hot water extraction (HWE) on two hardwood species (Acer rubrum, Populus tremuloides) and softwood species (mixture of southern yellow pine, Tsuga canadensis) were studied. The HWE resulted in a weight loss (WL) that increased as the severity factor (SF) was extended. Hardwood had the biggest WL values at equivalent extraction conditions. The extract contained a mixture of primarily hemicelluloses with some acetic acid and lignin. Select volatile organic compounds from the hot pressing of OSB panels were reduced by HWE of the strands. A clear advantage with extracted OSB panel (softwood or hardwood) for structural use is the improved dimensional stability and physical properties obtained as SF was increased. The mechanical property (MP) of composite for softwood was enhanced while for hardwood was reduced. Substantial improvements in MP were obtained at the intermediate SF (12% WL). When SF was extended beyond the optimum MP declined as measured by a cell wall test in both species. These changes are hypothesized to due to an increase in the percent crystallinity of cellulose. The increase in crystallinity was correlated to the MP, but the effect was less than of SF. Mechanical response was also affected by chemical component changes, micro- buckling, the reduction in moisture content and the reduction adhesion properties. Dispersive surface energy of red maple increased with SF due to extractive removal while that the contact angle measurement showed rapid penetration of probe liquids due to increases of porosity as a result of mass removal at high extraction conditions (over 15% WL). Basic characteristic related by IGC measurements could directly affect the chemical reaction between the resin and wood elements of hardwood species. For all these reasons, the recommended extraction for softwood should be below 12% WL and an improvement of resin system for hardwood species. The ability to manufacture lower density panels with same size and mechanical properties appears feasible to compensate for the material extracted.
Advisors/Committee Members: Stephen M. Shaler, Adriaan van Heiningen, Douglas J. Gardner.
Subjects/Keywords: Petroleum; Biorefineries; Hot water extraction (HWE); Forest Sciences
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APA (6th Edition):
Paredes Heller, J. J. (2009). The Influence of Hot Water Extraction on Physical and Mechanical Properties of OSB. (Doctoral Dissertation). University of Maine. Retrieved from https://digitalcommons.library.umaine.edu/etd/413
Chicago Manual of Style (16th Edition):
Paredes Heller, Juan Jacobo. “The Influence of Hot Water Extraction on Physical and Mechanical Properties of OSB.” 2009. Doctoral Dissertation, University of Maine. Accessed January 20, 2021.
https://digitalcommons.library.umaine.edu/etd/413.
MLA Handbook (7th Edition):
Paredes Heller, Juan Jacobo. “The Influence of Hot Water Extraction on Physical and Mechanical Properties of OSB.” 2009. Web. 20 Jan 2021.
Vancouver:
Paredes Heller JJ. The Influence of Hot Water Extraction on Physical and Mechanical Properties of OSB. [Internet] [Doctoral dissertation]. University of Maine; 2009. [cited 2021 Jan 20].
Available from: https://digitalcommons.library.umaine.edu/etd/413.
Council of Science Editors:
Paredes Heller JJ. The Influence of Hot Water Extraction on Physical and Mechanical Properties of OSB. [Doctoral Dissertation]. University of Maine; 2009. Available from: https://digitalcommons.library.umaine.edu/etd/413
22.
Rehn, Sofia.
Influencing Industrial Symbiosis Development : A Case Study of Händelö and Northern Habour Industrial Areas.
Degree: The Institute of Technology, 2013, Linköping UniversityLinköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93693
► The research field of industrial ecology studies energy and material flows within and between different systems in our society while the concept of industrial…
(more)
▼ The research field of industrial ecology studies energy and material flows within and between different systems in our society while the concept of industrial ecology strives toward mimicking similar flows in natural eco-systems. Industrial ecology can be a means of achieving decoupling between economic growth and environmental impact within the industry sector. A sub-field of industrial ecology is industrial symbiosis which focuses on material, energy and water exchanges between traditionally separate actors in order to achieve economic and environmental benefits. Energy provider E.ON is a part of the industrial symbiosis network on Händelö outside of Norrköping. E.ON also has operations in the Northern Harbour industrial area in Malmö, and sees an opportunity for the development of industrial symbiosis in that area which has unexploited land. The aim of this thesis is to explore how a private actor can influence the industrial development of an area to facilitate the formation of industrial symbiosis connections. This is done by studying the emergence and development of industrial symbiosis in Händelö and how different actors have influenced that development, as well as the conditions for such development in the Northern Harbour. Industrial symbiosis in Händelö has evolved spontaneously because of profitability in each connection. This study shows that the establishment of Agroetanol’s ethanol pilot plant next to Händelöverket was an enabling event in the development of the industrial symbiosis network. The diversity of fuels used in Händelöverket, and the number of energy products that it provides suggest that it served as a so called anchor tenant in this development, attracting Agroetanol with its availability of steam produced from renewable fuels. This was one important aspect for the establishment of Agroetanol. Political instruments such as a tax exemption on Agroetanol’s plant and CO2 and energy taxes on fossil fuels have also contributed to this development. Conditions for industrial symbiosis in the Northern Harbour in Malmö are quite different from those in Norrköping. An important difference is that industrial symbiosis has been recognized as a tool for sustainability and might be considered when planning the unexploited land. There are however many interest in this land, especially by the port company CMP and the City of Malmö’s Real Estate Office who have invested large sums in expanding the port business. They prefer goods intensive businesses that utilize the infrastructure provided by the port and railway in the area. Malmö has also set some ambitious environmental targets to be fulfilled 2030. They create a need to transition from the partly natural gas powered energy system today to one based on renewable fuels. There are also opportunities in a gasification plant which is planned by E.ON, and an EU-funded project seeking to make use of the biofuels potentials of port sites by using industrial symbiosis. The conclusions of the study are that there are ways…
Subjects/Keywords: industrial symbiosis; industrial ecology; biorefineries; industrial development
…so reduce waste
and contribute to closing loops. An example of biorefineries today is the… …animal feed and biogas among other
things (Anex, 2004). Future biorefineries, often… …referred to as advanced biorefineries, are based on
more advanced technologies like gasification… …biorefineries. The main condition being that the time scale for
the usage and regeneration of biomass… …biorefineries are partly overlapping
concepts, and that the biobased…
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APA ·
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APA (6th Edition):
Rehn, S. (2013). Influencing Industrial Symbiosis Development : A Case Study of Händelö and Northern Habour Industrial Areas. (Thesis). Linköping UniversityLinköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93693
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rehn, Sofia. “Influencing Industrial Symbiosis Development : A Case Study of Händelö and Northern Habour Industrial Areas.” 2013. Thesis, Linköping UniversityLinköping University. Accessed January 20, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93693.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rehn, Sofia. “Influencing Industrial Symbiosis Development : A Case Study of Händelö and Northern Habour Industrial Areas.” 2013. Web. 20 Jan 2021.
Vancouver:
Rehn S. Influencing Industrial Symbiosis Development : A Case Study of Händelö and Northern Habour Industrial Areas. [Internet] [Thesis]. Linköping UniversityLinköping University; 2013. [cited 2021 Jan 20].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93693.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rehn S. Influencing Industrial Symbiosis Development : A Case Study of Händelö and Northern Habour Industrial Areas. [Thesis]. Linköping UniversityLinköping University; 2013. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93693
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
23.
Dimou, Charalampia.
Ανάπτυξη και σχεδιασμός καινοτόμου βιοδιυλιστηρίου που βασίζεται στην αξιοποίηση της οινολάσπης και της ακατέργαστης γλυκερόλης προς παραγωγή προϊόντων προστιθέμενης αξίας και πολυ-3-υδροξυ-βουτυρικού εστέρα μέσω μικροβιακών ζυμώσεων.
Degree: 2016, Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών
URL: http://hdl.handle.net/10442/hedi/40290
► The transition to the bio-economy era and the replacement of petrochemical processes for the production of chemicals and polymers require the valorization of industrial waste…
(more)
▼ The transition to the bio-economy era and the replacement of petrochemical processes for the production of chemicals and polymers require the valorization of industrial waste and by-product streams through the development of novel and integrated biorefinery concepts. Furthermore, restructuring the conventional fermentation industry is essential because the production of chemicals and polymers via microbial bioconversion is not sustainable through single stage conversion of commercial and purified raw materials (e.g. glucose, yeast extract). The sustainable development of integrated biorefineries will encompass the production of energy, food, feed, chemicals, biodegradable polymers and biomaterials. Within this context, valorization of industrial food waste and by-product streams could lead to reduced environmental impact and additional revenue to existing industrial sectors. This PhD thesis has focussed on the development of a novel integrated biorefinery concept using wine lees as raw material for the production of ethanol, calcium tartrate, antioxidant-rich extracts and nutrient-rich fermentation supplement. The material balances were determined when wine lees from a Merlot wine variety were used. The process begins with the separation of the liquid and solid fractions via centrifugation. The solid fraction is fractionated into an antioxidant-rich fraction and calcium tartrate. After the separation of phenolic compounds and tartrate salts from the solid fraction of wine lees, the remaining solids were rich in yeast cells. The yeast cells were subsequently lysed using crude enzyme-rich extracts derived via solid state fermentation of Aspergillus oryzae carried out on wheat milling by-products. The optimal temperature, pH, reaction duration, initial solid concentration and initial proteolytic activity of the hydrolysis reaction were optimized. The highest free amino nitrogen and inorganic phosphorus concentration achieved were around 1400 mg/L and 130 mg/L, respectively, at pH value of 5.5, temperature of 40 ⁰C, duration of 48 h, initial solid concentration of 75 g/L and initial proteolytic activity of 12 U/mL. This PhD thesis identified that it is feasible to combine the extraction of value added products with the production of a nutrient-rich generic feedstock that could be used as fermentation supplement for the production of poly(3-hydroxybutyrate) (PHB). Various feedstocks were initially evaluated for the production of PHB via fermentation including hydrolysates from flour-rich wastes produced by a confectionery industry, rapeseed meal hydrolysates and crude glycerol derived from biodiesel production processes and wine lees derived hydrolysates. Optimisation of fed-batch bioreactor cultures mainly focused on PHB production using crude glycerol and wine lees derived hydrolysates using the bacterial strain Cupriavidus necator DSZM 7237. Shake flask and bioreactor cultures showed that PHB production was triggered by phosphorus depletion. The highest fermentation efficiency was achieved when the crude glycerol and…
Subjects/Keywords: Αξιοποίηση οινολασπών; Ακατέργαστη γλυκερόλη; Βιοδιεργασίες; Βιοδιυλιστήρια; Προϊόντα προστιθέμενης αξίας; Ένζυμα; Wine lees; Crude glycerol; Bioprocesses; Biorefineries; Value added products; Enzymes
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APA (6th Edition):
Dimou, C. (2016). Ανάπτυξη και σχεδιασμός καινοτόμου βιοδιυλιστηρίου που βασίζεται στην αξιοποίηση της οινολάσπης και της ακατέργαστης γλυκερόλης προς παραγωγή προϊόντων προστιθέμενης αξίας και πολυ-3-υδροξυ-βουτυρικού εστέρα μέσω μικροβιακών ζυμώσεων. (Thesis). Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών. Retrieved from http://hdl.handle.net/10442/hedi/40290
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dimou, Charalampia. “Ανάπτυξη και σχεδιασμός καινοτόμου βιοδιυλιστηρίου που βασίζεται στην αξιοποίηση της οινολάσπης και της ακατέργαστης γλυκερόλης προς παραγωγή προϊόντων προστιθέμενης αξίας και πολυ-3-υδροξυ-βουτυρικού εστέρα μέσω μικροβιακών ζυμώσεων.” 2016. Thesis, Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών. Accessed January 20, 2021.
http://hdl.handle.net/10442/hedi/40290.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dimou, Charalampia. “Ανάπτυξη και σχεδιασμός καινοτόμου βιοδιυλιστηρίου που βασίζεται στην αξιοποίηση της οινολάσπης και της ακατέργαστης γλυκερόλης προς παραγωγή προϊόντων προστιθέμενης αξίας και πολυ-3-υδροξυ-βουτυρικού εστέρα μέσω μικροβιακών ζυμώσεων.” 2016. Web. 20 Jan 2021.
Vancouver:
Dimou C. Ανάπτυξη και σχεδιασμός καινοτόμου βιοδιυλιστηρίου που βασίζεται στην αξιοποίηση της οινολάσπης και της ακατέργαστης γλυκερόλης προς παραγωγή προϊόντων προστιθέμενης αξίας και πολυ-3-υδροξυ-βουτυρικού εστέρα μέσω μικροβιακών ζυμώσεων. [Internet] [Thesis]. Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών; 2016. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10442/hedi/40290.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dimou C. Ανάπτυξη και σχεδιασμός καινοτόμου βιοδιυλιστηρίου που βασίζεται στην αξιοποίηση της οινολάσπης και της ακατέργαστης γλυκερόλης προς παραγωγή προϊόντων προστιθέμενης αξίας και πολυ-3-υδροξυ-βουτυρικού εστέρα μέσω μικροβιακών ζυμώσεων. [Thesis]. Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών; 2016. Available from: http://hdl.handle.net/10442/hedi/40290
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
24.
Pyrgakis, Konstantinos.
Ολοκληρωμένος σχεδιασμός βιοδιυλιστηρίων.
Degree: 2020, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)
URL: http://hdl.handle.net/10442/hedi/47422
► The upcoming field of biorefineries and the implementation of circular economy appear new challenges and design problems that cannot be effectively addressed by the conventional…
(more)
▼ The upcoming field of biorefineries and the implementation of circular economy appear new challenges and design problems that cannot be effectively addressed by the conventional engineering tools of literature. This work presents three generalized methodologies and computational tools that combine process synthesis and integration technologies in order to detect complementary processes, to improve energy efficiencies and sustainability margins of upcoming biorefineries and to upgrade performance of existing industry. New challenges arise originated from the analysis of value chains, which include numerous candidate chemical, biochemical and thermochemical paths that upgrade waste flows and/or biomass feedstocks into added value chemicals, like solvents, fuels, materials, nutraceuticals, etc. The design problem involves infinite synthesis options of candidate, competitive and existing paths that need to be evaluated and screened in order to reveal best biorefining routes that effectively integrate among them and with adjacent, distributed industries. The proposed methodologies are generalized and become an ideal solution to detect high sustainable biorefining strategies ahead of detailed design, as well as to address any case of conventional industry.The methodologies focus on key degrees of freedom related with connections among upcoming and existing processes and industries preparing the conditions to exchange chemicals and energy among them in the scope of viably applying circular economy. Each process results in different efficiencies when integrated across alternative process combinations, which need to be systematically screened and evaluated to detect promising biorefinery portfolios (feedstocks, processes and products) in terms of energy savings and profitability margins. High energy costs reported in real-life biorefinery cases are unable to support the selected production paths, unless proper and strong energy integration is provided. Common process-to-process integration methodologies are based on graphical tools, that apply as separate analysis stages, each referring to different levels of integration: the first, for direct integration of hot-cold streams within each process and the second, for indirect (via steam) process-to-process integration. Under these conditions, the conventional graphical tools are strictly applied for known and preselected process portfolios, rather than for candidate chemical paths. This work presents systems representations to address the combinatorial nature of the process synthesis and integration problem, incorporating processes as additional degrees of freedom in integration procedure. The methodology utilizes a generalized graph that maps all synthesis options among candidate/variable and existing/fixed distributed processes, which are expected to exchange chemical flows and energy in any way and combination. The graph also includes options to address problems subjected to seasonal availability of biomass varieties considering competitive feedstocks as additional degrees of…
Subjects/Keywords: Ολοκλήρωση διεργασιών; Ενεργειακή βελτιστοποίηση; Βιοδιυλιστήρια; Συμπαραγωγή; Ανάλυση αλυσίδων αξίας; Process integration; Energy optimization; Biorefineries; Cogeneration; Value chain analysis
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APA ·
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APA (6th Edition):
Pyrgakis, K. (2020). Ολοκληρωμένος σχεδιασμός βιοδιυλιστηρίων. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/47422
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pyrgakis, Konstantinos. “Ολοκληρωμένος σχεδιασμός βιοδιυλιστηρίων.” 2020. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed January 20, 2021.
http://hdl.handle.net/10442/hedi/47422.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pyrgakis, Konstantinos. “Ολοκληρωμένος σχεδιασμός βιοδιυλιστηρίων.” 2020. Web. 20 Jan 2021.
Vancouver:
Pyrgakis K. Ολοκληρωμένος σχεδιασμός βιοδιυλιστηρίων. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2020. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10442/hedi/47422.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pyrgakis K. Ολοκληρωμένος σχεδιασμός βιοδιυλιστηρίων. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2020. Available from: http://hdl.handle.net/10442/hedi/47422
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
25.
Pennaz, Eric James.
Conceptual Design of Biorefineries Through the Synthesis of Optimal Chemical-reaction Pathways.
Degree: MS, Chemical Engineering, 2011, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9950
► Decreasing fossil fuel reserves and environmental concerns necessitate a shift toward biofuels. However, the chemistry of many biomass to fuel conversion pathways remains to be…
(more)
▼ Decreasing fossil fuel reserves and environmental concerns necessitate a shift toward biofuels. However, the chemistry of many biomass to fuel conversion pathways remains to be thoroughly studied. The future of
biorefineries thus depends on developing new pathways while optimizing existing ones. Here, potential chemicals are added to create a superstructure, then an algorithm is run to enumerate every feasible reaction stoichiometry through a mixed integer linear program (MILP). An optimal chemical reaction pathway, taking into account thermodynamic, safety, and economic constraints is then found through reaction network flux analysis (RNFA). The RNFA is first formulated as a linear programming problem (LP) and later recast as an MILP in order to solve multiple alternate optima through integer cuts. A graphical method is also developed in order to show a shortcut method based on thermodynamics as opposed to the reaction stoichiometry enumeration and RNFA methods. A hypothetical case study, based on the conversion of woody biomass to liquid fuels, is presented at the end of the work along with a more detailed look at the glucose and xylose to 2-mthyltetrahydrofuran (MTHF) biofuel production pathway.
Advisors/Committee Members: El-Halwagi, Mahmoud (advisor), Laird, Carl (committee member), Curry, Guy (committee member).
Subjects/Keywords: Reaction Network Synthesis; Biorefinery; Biorefineries; RNFA; Reaction Enumeration; Biofuels
…chemical
reaction pathways in biorefineries. While the search space has contained the molecules… …3
selected to those which would be most suited to biorefineries, there is applicability… …better chemical reaction pathways for biorefineries can
be seen in the economics of the current… …Figure 1.2. For renewable fuels
produced in biorefineries to become competitive, better… …fuels and alternate
chemical products (Shafiee and Topal 2009). Biorefineries…
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APA (6th Edition):
Pennaz, E. J. (2011). Conceptual Design of Biorefineries Through the Synthesis of Optimal Chemical-reaction Pathways. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9950
Chicago Manual of Style (16th Edition):
Pennaz, Eric James. “Conceptual Design of Biorefineries Through the Synthesis of Optimal Chemical-reaction Pathways.” 2011. Masters Thesis, Texas A&M University. Accessed January 20, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9950.
MLA Handbook (7th Edition):
Pennaz, Eric James. “Conceptual Design of Biorefineries Through the Synthesis of Optimal Chemical-reaction Pathways.” 2011. Web. 20 Jan 2021.
Vancouver:
Pennaz EJ. Conceptual Design of Biorefineries Through the Synthesis of Optimal Chemical-reaction Pathways. [Internet] [Masters thesis]. Texas A&M University; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9950.
Council of Science Editors:
Pennaz EJ. Conceptual Design of Biorefineries Through the Synthesis of Optimal Chemical-reaction Pathways. [Masters Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9950
Washington State University
26.
[No author].
A Multi-Criteria Decision Support Tool for Biorefinery Siting
.
Degree: 2016, Washington State University
URL: http://hdl.handle.net/2376/12003
► Cellulosic and advanced biorefineries face significant challenges in the road to commercialization. Many have failed to reach or maintain commercialized status due to significant upfront…
(more)
▼ Cellulosic and advanced
biorefineries face significant challenges in the road to commercialization. Many have failed to reach or maintain commercialized status due to significant upfront construction costs, high feedstock and production costs, and high risk associated with new technologies. Cellulosic and advanced biofuels must provide reduced life cycle greenhouse gas (GHG) emissions by 60% and 50%, respectively, over an equivalent petroleum baseline to meet regulations set by the U.S. Environmental Protection Agency’s Renewable Fuel Standard. Additionally, support at the community level can enhance or hinder a biorefinery’s success.
Repurposing existing industrial facilities into
biorefineries may reduce capital expenditures, and selecting facilities based on biorefinery operational costs that vary geospatially may provide operational cost reductions. Additionally assessing facilities for their community social assets and GHG emissions along the supply chain can illuminate those best suited for repurposing based on multiple siting goals.
Considering economic, environmental, and social factors concurrently in biorefinery siting may further reduce investment risk and aid in meeting emission reduction standards. To this end, a decision support tool (DST) is developed at a strategic level to aid stakeholders in selecting existing industrial facilities as
biorefineries through assessing economic, environmental, and social metrics using criteria, weights, and scales. Criteria are selected as quantifiable siting metrics, weights define the relative
importance of each criterion, and scale values allow for assessing facilities against each criterion based location-specific values. Economic criteria are derived from biorefinery operational cost components that vary geospatially, including a criterion to assess each facility’s repurpose potential based on the infrastructure and assets present. The environmental metric is defined as GHG emissions aggregated along the supply chain, reported as 100-year global warming potential. The social metric is defined by two factors, the number of jobs created and three county-level social assets that together indicate a community’s potential receptivity to a new biorefinery. A score is created for each facility, and user-defined overall metric weights adjust the final scores based on stakeholder goals. The DST may be utilized in any region for assessing the repurpose potential of industrial facilities based on a given biofuel conversion process and regional feedstocks.
Advisors/Committee Members: Wolcott, Michael P (advisor).
Subjects/Keywords: Alternative energy;
Agriculture economics;
biofuel supply chain;
cellulosic and advanced biorefineries;
economic;
environmental;
and social facility siting criteria;
GIS network analyst tool;
pulp mills;
repurpose potential of existing facilities
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APA (6th Edition):
author], [. (2016). A Multi-Criteria Decision Support Tool for Biorefinery Siting
. (Thesis). Washington State University. Retrieved from http://hdl.handle.net/2376/12003
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
author], [No. “A Multi-Criteria Decision Support Tool for Biorefinery Siting
.” 2016. Thesis, Washington State University. Accessed January 20, 2021.
http://hdl.handle.net/2376/12003.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
author], [No. “A Multi-Criteria Decision Support Tool for Biorefinery Siting
.” 2016. Web. 20 Jan 2021.
Vancouver:
author] [. A Multi-Criteria Decision Support Tool for Biorefinery Siting
. [Internet] [Thesis]. Washington State University; 2016. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/2376/12003.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
author] [. A Multi-Criteria Decision Support Tool for Biorefinery Siting
. [Thesis]. Washington State University; 2016. Available from: http://hdl.handle.net/2376/12003
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Manchester
27.
Martinez Hernandez, Elias.
Process integration, economic and environmental analysis tools for biorefinery design.
Degree: PhD, 2013, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/process-integration-economic-and-environmental-analysis-tools-for-biorefinery-design(11e7433a-f8cb-4b1b-a91b-49a43c6a2dae).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.606917
► Renewability and the carbonaceous basis of biomass provide potential for both energy and chemical production in biorefineries in a fashion similar to crude oil refineries.…
(more)
▼ Renewability and the carbonaceous basis of biomass provide potential for both energy and chemical production in biorefineries in a fashion similar to crude oil refineries. Biorefineries are envisaged as having a key role in the transition to a more sustainable industry, especially as a means to mitigate greenhouse gas (GHG) emissions. A biorefinery is a concept for the flexible, efficient, cost-effective and sustainable conversion of biomass through a combination of process technologies into multiple products. This implies that biorefineries must be integrated through designs that exploit the interactions between material and energy streams. The wide range of possibilities for biomass feedstock, processes and products poses a challenge to biorefinery design. Integrating biorefineries within evolving economic and environmental policy contexts requires careful analysis of the configurations to be deployed from early in the design stage. This research therefore focuses on the application and development of methodologies for biorefinery design encompassing process integration tools, economic and environmental sustainability analyses together. The research is presented in the form of papers published or submitted to relevant peer-reviewed journals, with a preamble for each paper and a final synthesis of the work as a whole. In a first stage, mass pinch analysis was adapted into a method for integration ofbiorefineries producing bioethanol as a final product and also utilising bioethanol asa working fluid within the biorefinery. The tool allows targeting minimum bioethanol utilisation and assessing network modifications to diminish revenue losses. This new application could stimulate the emergence of similar approaches for the design of integrated biorefineries. The thesis then moves to combine feedstock production models, process simulations in Aspen Plus® and process integration with LCA, to improve energy efficiency and reduce GHG emissions of biorefineries. This work, presented via two publications covering wheat to bioethanol and Jatropha to biodiesel or green diesel, provided evidence of the benefits of biorefinery integrationfor energy saving and climate change adaptation. The multilevel modelling approach is then further integrated into a methodologydeveloped for the combined evaluation of the economic potential and GHG emissions saving of a biorefinery from the marginal performances of biorefineryproducts. The tool allows assessing process integration pathways and targeting forpolicy compliance. The tool is presented via two further publications, the first drawing analogies between value analysis and environmental impact analysis inorder to create the combined Economic Value and Environmental Impact (EVEI)analysis methodology, the second extending this to demonstrate how the tool canguide judicious movement of environmental burdens to meet policy targets. The research embodied in this thesis forms a systematic basis for the analysis andgeneration of biorefinery process designs for enhanced sustainability. The…
Subjects/Keywords: 660; biorefineries; biorefinery design; biorefinery simulation; biorefinery analysis; biorefinery LCA; bioethanol; biodiesel; green diesel; biogas; gasification; biomass; anaerobic digestion; Jatropha; process integration; pinch analysis
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APA ·
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APA (6th Edition):
Martinez Hernandez, E. (2013). Process integration, economic and environmental analysis tools for biorefinery design. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/process-integration-economic-and-environmental-analysis-tools-for-biorefinery-design(11e7433a-f8cb-4b1b-a91b-49a43c6a2dae).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.606917
Chicago Manual of Style (16th Edition):
Martinez Hernandez, Elias. “Process integration, economic and environmental analysis tools for biorefinery design.” 2013. Doctoral Dissertation, University of Manchester. Accessed January 20, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/process-integration-economic-and-environmental-analysis-tools-for-biorefinery-design(11e7433a-f8cb-4b1b-a91b-49a43c6a2dae).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.606917.
MLA Handbook (7th Edition):
Martinez Hernandez, Elias. “Process integration, economic and environmental analysis tools for biorefinery design.” 2013. Web. 20 Jan 2021.
Vancouver:
Martinez Hernandez E. Process integration, economic and environmental analysis tools for biorefinery design. [Internet] [Doctoral dissertation]. University of Manchester; 2013. [cited 2021 Jan 20].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/process-integration-economic-and-environmental-analysis-tools-for-biorefinery-design(11e7433a-f8cb-4b1b-a91b-49a43c6a2dae).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.606917.
Council of Science Editors:
Martinez Hernandez E. Process integration, economic and environmental analysis tools for biorefinery design. [Doctoral Dissertation]. University of Manchester; 2013. Available from: https://www.research.manchester.ac.uk/portal/en/theses/process-integration-economic-and-environmental-analysis-tools-for-biorefinery-design(11e7433a-f8cb-4b1b-a91b-49a43c6a2dae).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.606917
University of Kentucky
28.
Hall, Scott W.
ECONOMIC IMPACT OF ETHANOL BIOREFINERIES IN THE U.S. MIDWEST FROM 2001 TO 2015: A QUASI-EXPERIMENTAL APPROACH.
Degree: 2019, University of Kentucky
URL: https://uknowledge.uky.edu/agecon_etds/76
► The objective of this dissertation is to analyze the economic impact of newly operational ethanol biorefineries on rural counties in the U.S. Midwest region for…
(more)
▼ The objective of this dissertation is to analyze the economic impact of newly operational ethanol biorefineries on rural counties in the U.S. Midwest region for the period 2001 to 2015 using a quasi-experimental approach. Rapid growth in the ethanol industry expanded the number of ethanol plants located in the U.S. Midwest from 54 in 2001 to 173 in 2015. Out of the counties with 119 new ethanol biorefineries, 97 counties met the general treatment criteria defined in this dissertation, but only 56 of those counties qualified for the rural treatment criteria. Counties with ethanol biorefineries that qualified for treatment were organized into a treated group based on county level data. Six counterfactual control groups (or control counties without ethanol biorefineries) were contemporaneously matched to the treated counties based on the Mahalanobis distance metric evaluated on a set of 29 selection variables. Matching occurred on two levels. In the first level, matching was performed both for the in-state level and over the entire Midwest region. In the second level, three criteria were used to select the final control groups: Mahalanobis distance metric best match, population best match, and rural-urban continuum codes (RUCC) best match.
Economic impact is evaluated based on the growth rate in real per capita earnings for the treated group over a period from one to five years after treatment relative to the control group. A difference-in-differences (DID) model is used to assess the significance of results where the dependent variable is the natural log of real per capita earnings and a set of control variables is used to capture state fixed effects, time fixed effects and spillover effects. Empirical results evaluated against a representative Midwest control group and over six regression models adjusting for various fixed effects produced, on average, one-sided significant results for average treatment on the treated (ATOT) with a (min, max) range of growth rates as (5.53%-7.63%), (10.0%-12.0%), (14.7%-19.6%), (14.5%-18.3%), and (13.3%-18.9%) from one to five years after treatment, respectively. The minimum value of these estimates can be represented as an uncorrected average annual growth rate as 2.75%, 3.33%, 3.68%, 2.90%, and 2.22% over the respective period from one to five years after treatment. Employment levels for the treated group increased on average by 211 at the county level five years after treatment. A comparative Midwest control group lost, on average, 169 jobs over the five year period after treatment. A treated county employment multiplier calculated using the direct, indirect and induced employment impacts varied from 1.46 during the year of treatment to 7.6 five years after treatment relative to the control group. Five years after treatment, the treated group employment rate gradually increased, on average, by 2.2% which was better than either of the two counterfactual control groups used in this comparison.
Overall, the analysis presented in this dissertation does show statistically significant…
Subjects/Keywords: Rural Economic Development; Renewable Fuel Standard; Energy; Bioenergy; Ethanol Biorefineries; U.S. Midwest; Economic Policy; Energy Policy; Environmental Policy; Growth and Development; Industrial Organization; Regional Economics
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Manager
APA (6th Edition):
Hall, S. W. (2019). ECONOMIC IMPACT OF ETHANOL BIOREFINERIES IN THE U.S. MIDWEST FROM 2001 TO 2015: A QUASI-EXPERIMENTAL APPROACH. (Doctoral Dissertation). University of Kentucky. Retrieved from https://uknowledge.uky.edu/agecon_etds/76
Chicago Manual of Style (16th Edition):
Hall, Scott W. “ECONOMIC IMPACT OF ETHANOL BIOREFINERIES IN THE U.S. MIDWEST FROM 2001 TO 2015: A QUASI-EXPERIMENTAL APPROACH.” 2019. Doctoral Dissertation, University of Kentucky. Accessed January 20, 2021.
https://uknowledge.uky.edu/agecon_etds/76.
MLA Handbook (7th Edition):
Hall, Scott W. “ECONOMIC IMPACT OF ETHANOL BIOREFINERIES IN THE U.S. MIDWEST FROM 2001 TO 2015: A QUASI-EXPERIMENTAL APPROACH.” 2019. Web. 20 Jan 2021.
Vancouver:
Hall SW. ECONOMIC IMPACT OF ETHANOL BIOREFINERIES IN THE U.S. MIDWEST FROM 2001 TO 2015: A QUASI-EXPERIMENTAL APPROACH. [Internet] [Doctoral dissertation]. University of Kentucky; 2019. [cited 2021 Jan 20].
Available from: https://uknowledge.uky.edu/agecon_etds/76.
Council of Science Editors:
Hall SW. ECONOMIC IMPACT OF ETHANOL BIOREFINERIES IN THE U.S. MIDWEST FROM 2001 TO 2015: A QUASI-EXPERIMENTAL APPROACH. [Doctoral Dissertation]. University of Kentucky; 2019. Available from: https://uknowledge.uky.edu/agecon_etds/76
29.
Papadaki, Aikaterini.
Valorisation of renewable resources produced by sugarcane mills and oilseed processing industries via microbial and enzymatic processes for the production of fumaric acid, wax esters, biolubricants and oleogels.
Degree: 2018, Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών
URL: http://hdl.handle.net/10442/hedi/45523
► This PhD thesis focuses on the processing and valorization of food industry raw materials, including very high polarity (VHP) cane sugar, molasses, soybean cake, and…
(more)
▼ This PhD thesis focuses on the processing and valorization of food industry raw materials, including very high polarity (VHP) cane sugar, molasses, soybean cake, and renewable resources, such as fatty acid distillates derived from vegetable oil refining processes, towards the development of novel biorefinery concepts. The aim was the production of value-added bio-economy products, which can be applied in the food industry, through bioprocess development. The chemical composition of all raw materials was initially quantified, including soluble sugars, nitrogen, protein, phenolic compounds, ash, moisture content, trace minerals and fibers. Thereafter, the proper processing methods were developed for the biotechnological production of intermediate products, such as microbial oils, and food additives, such as fumaric acid and carotenoids. Additionally, fatty acid esters and oleogels, as novel bio-based products for the food industry, were produced in the last part of this thesis.Initially, the research focused on the soybean cake processing method via the enzymatic route, aiming to the valorization of the protein content. A two-stage bioprocess was developed employing solid state fungal fermentation for the production of crude enzymes that were used for enzymatic hydrolysis of soybean cake to produce a nutrient-rich fermentation feedstock. The effect of temperature and initial enzyme activity on the hydrolysis process was evaluated through the determination of free amino nitrogen (FAN) and inorganic phosphorus concentration in the produced hydrolysate.Soybean cake hydrolysate was utilized as pre-culture fermentation medium in the cultivation of the fungal strain Rhizopus arrhizus for the production of fumaric acid. Batch and fed-batch fermentations were conducted in shake flasks for the production of fumaric acid using different raw materials, such as mixtures of glucose and fructose, VHP cane sugar and molasses. The highest fumaric acid concentration (40 g/L) with a sugar conversion yield of 0.86 g/g was achieved in a fermentation medium containing VHP cane sugar inoculated with a pre-culture medium produced with soybean cake hydrolysate at initial FAN concentration of 200 mg/L. The utilization of molasses showed that its high content in specific phenolic compounds and trace elements was inhibitory for the production of fumaric acid.Microbial oil and carotenoids production by the oleaginous yeast Rhodosporidium toruloides DSM 4444 was assessed using VHP cane sugar and molasses. Shake flask fermentations using VHP cane sugar led to microbial oil concentration of 8.1 g/L and total dry weight of 23.8 g/L. The effect of supplementation with phosphate salts, trace elements and commercial nitrogen sources in a molasses-based medium was evaluated in shake flask cultures for microbial oil production. Experimental results showed that 12.7 g/L microbial oil was achieved with an intracellular content of 59% (w/w), when the medium contained all the supplements. Fed-batch fermentations in bioreactor were also carried out using…
Subjects/Keywords: Κυκλική οικονομία; Βιοδιυλιστήρια; Επεξεργασία τροφίμων και παραπροϊόντων; Βιοδιεργασίες; Βιοτεχνολογία; Zύμωση; Ένζυμα; Μικροβιακά λιπίδια; Καροτενοειδή; Πρόσθετα τροφίμων; Ελαιοπηκτές; Circular economy; Biorefineries; Food and by-products processing; Bioprocessing; Biotechnology; Fermentation; Enzymes; Microbial oil; Carotenoids; Food additives; Oleogels
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APA ·
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APA (6th Edition):
Papadaki, A. (2018). Valorisation of renewable resources produced by sugarcane mills and oilseed processing industries via microbial and enzymatic processes for the production of fumaric acid, wax esters, biolubricants and oleogels. (Thesis). Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών. Retrieved from http://hdl.handle.net/10442/hedi/45523
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Papadaki, Aikaterini. “Valorisation of renewable resources produced by sugarcane mills and oilseed processing industries via microbial and enzymatic processes for the production of fumaric acid, wax esters, biolubricants and oleogels.” 2018. Thesis, Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών. Accessed January 20, 2021.
http://hdl.handle.net/10442/hedi/45523.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Papadaki, Aikaterini. “Valorisation of renewable resources produced by sugarcane mills and oilseed processing industries via microbial and enzymatic processes for the production of fumaric acid, wax esters, biolubricants and oleogels.” 2018. Web. 20 Jan 2021.
Vancouver:
Papadaki A. Valorisation of renewable resources produced by sugarcane mills and oilseed processing industries via microbial and enzymatic processes for the production of fumaric acid, wax esters, biolubricants and oleogels. [Internet] [Thesis]. Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών; 2018. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10442/hedi/45523.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Papadaki A. Valorisation of renewable resources produced by sugarcane mills and oilseed processing industries via microbial and enzymatic processes for the production of fumaric acid, wax esters, biolubricants and oleogels. [Thesis]. Agricultural University of Athens; Γεωπονικό Πανεπιστήμιο Αθηνών; 2018. Available from: http://hdl.handle.net/10442/hedi/45523
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Tennessee – Knoxville
30.
Huang, Xia.
Bayesian Logistic Regression Model for Siting Biomass-using Facilities.
Degree: MS, Statistics, 2010, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_gradthes/808
► Key sources of oil for western markets are located in complex geopolitical environments that increase economic and social risk. The amalgamation of economic, environmental, social…
(more)
▼ Key sources of oil for western markets are located in complex geopolitical environments that increase economic and social risk. The amalgamation of economic, environmental, social and national security concerns for petroleum-based economies have created a renewed emphasis on alternative sources of energy which include biomass. The stability of sustainable biomass markets hinges on improved methods to predict and visualize business risk and cost to the supply chain.
This thesis develops Bayesian logistic regression models, with comparisons of classical maximum likelihood models, to quantify significant factors that influence the siting of biomass-using facilities and predict potential locations in the 13-state Southeastern United States for three types of biomass-using facilities. Group I combines all biomass-using mills,
biorefineries using agricultural residues and wood-using bioenergy/biofuels plants. Group II included pulp and paper mills, and
biorefineries that use agricultural and wood residues. Group III included food processing mills and
biorefineries that use agricultural and wood residues. The resolution of this research is the 5-digit ZIP Code Tabulation Area (ZCTA), and there are 9,416 ZCTAs in the 13-state Southeastern study region.
For both classical and Bayesian approaches, a training set of data was used plus a separate validation (hold out) set of data using a pseudo-random number-generating function in SAS® Enterprise Miner. Four predefined priors are constructed. Bayesian estimation assuming a Gaussian prior distribution provides the highest correct classification rate of 86.40% for Group I; Bayesian methods assuming the non-informative uniform prior has the highest correct classification rate of 95.97% for Group II; and Bayesian methods assuming a Gaussian prior gives the highest correct classification rate of 92.67% for Group III. Given the comparative low sensitivity for Group II and Group III, a hybrid model that integrates classification trees and local Bayesian logistic regression was developed as part of this research to further improve the predictive power. The hybrid model increases the sensitivity of Group II from 58.54% to 64.40%, and improves both of the specificity and sensitivity significantly for Group III from 98.69% to 99.42% and 39.35% to 46.45%, respectively. Twenty-five optimal locations for the biomass-using facility groupings at the 5-digit ZCTA resolution, based upon the best fitted Bayesian logistic regression model and the hybrid model, are predicted and plotted for the 13-state Southeastern study region.
Advisors/Committee Members: Timothy M. Young, Frank M. Guess, Russell L. Zaretzki.
Subjects/Keywords: biorefineries; agricultural residues; site location; prediction; Bayesian logistic regression models; Classification Trees; Applied Statistics; Statistical Methodology; Statistical Models
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huang, X. (2010). Bayesian Logistic Regression Model for Siting Biomass-using Facilities. (Thesis). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_gradthes/808
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Huang, Xia. “Bayesian Logistic Regression Model for Siting Biomass-using Facilities.” 2010. Thesis, University of Tennessee – Knoxville. Accessed January 20, 2021.
https://trace.tennessee.edu/utk_gradthes/808.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Huang, Xia. “Bayesian Logistic Regression Model for Siting Biomass-using Facilities.” 2010. Web. 20 Jan 2021.
Vancouver:
Huang X. Bayesian Logistic Regression Model for Siting Biomass-using Facilities. [Internet] [Thesis]. University of Tennessee – Knoxville; 2010. [cited 2021 Jan 20].
Available from: https://trace.tennessee.edu/utk_gradthes/808.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Huang X. Bayesian Logistic Regression Model for Siting Biomass-using Facilities. [Thesis]. University of Tennessee – Knoxville; 2010. Available from: https://trace.tennessee.edu/utk_gradthes/808
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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Open Access Theses and Dissertations
