subject:(dewatering)

University of Manchester

1. Zhang, Yi. Suspension Dewatering with Aggregate Densification.

Degree: 2014, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270

► This thesis concerns design of two pieces of suspension dewatering equipment (i.e. transient batch settlers and steady state continuous gravity thickeners). In a transient batch… (more)

▼ This thesis concerns design of two pieces of suspension dewatering equipment (i.e. transient batch settlers and steady state continuous gravity thickeners). In a transient batch settler, very slow densification of aggregates within the suspension is considered whilst the drag on the solids in the suspension is assumed to be negligible. The interface of the suspension is then determined by a balance between gravity and the gradient of the compressive yield stress of the gelled suspension. The compressive yield stress functional form in general could be either a weakly gelled formula, or a strongly gelled formula. These formulae differ in the way they behave for solids concentrations in the neighbourhood of the suspension gel point. The effects of the above two gel formulae, the evolution of the compressive yield stress functional form over time during aggregate densification, different initial suspension heights, and different initial feed solids volume fractions upon the predictions of consolidated bed structures and solids volume fractions obtained at the bottom of a batch settler, and upon the evolution of the heights of the suspension and the consolidated bed have been explored. A sufficiently tall initial suspension height might lead to insignificant increases in the solids volume fractions obtained at the bottom of batch settlers after time-dependent aggregate densification. The interfaces of the suspension and the consolidation zone coincide after aggregate densification if the gel point, which increases with time, is larger than the initial feed solids volume fractions. Moreover, the maximum permitted underflow solids fluxes predicted from steady state thickeners have been investigated and compared. Pre-shearing of aggregates which densifies aggregates to have smaller diameters upon entering the thickener is necessary if large underflow solids fluxes and small underflow solids volume fractions are specified. The solids volume fraction at the top of the consolidated bed which is the densified gel point is influenced by the extent of pre-shearing of aggregates. An algorithm for determining this densified gel point has also been developed. In reality, thickeners contain not just a consolidating bed, but also a hindered settling region above it. When the hindered settling region is considered in a thickener, the effects of the extent of aggregate densification that has occurred in the hindered settling region and how that impacts upon thickener performance and sludge rheological properties have been explored in this thesis. A new algorithm for predicting the densified gel point obtained at the top of the consolidated bed has been developed when the hindered settling region is present. The effects of underflow solids volume fractions, aggregate densification rate parameters and pre-shearing of aggregates upon the predictions of maximum permitted underflow solids fluxes, sludge rheological properties, and thickener performance have been explored. The predictions of thickener performance using both the weakly and… Advisors/Committee Members: MARTIN, ALASTAIR AD, Grassia, Paul, Martin, Alastair.

Subjects/Keywords: Suspension;

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APA (6^th Edition):

Zhang, Y. (2014). Suspension Dewatering with Aggregate Densification. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270

Chicago Manual of Style (16^th Edition):

Zhang, Yi. “Suspension Dewatering with Aggregate Densification.” 2014. Doctoral Dissertation, University of Manchester. Accessed December 07, 2019. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270.

MLA Handbook (7^th Edition):

Zhang, Yi. “Suspension Dewatering with Aggregate Densification.” 2014. Web. 07 Dec 2019.

Vancouver:

Zhang Y. Suspension Dewatering with Aggregate Densification. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2019 Dec 07]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270.

Council of Science Editors:

Zhang Y. Suspension Dewatering with Aggregate Densification. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270

University of Alberta

2. Haroon, M Hasin. Flocculation and dewatering of kaolinite suspensions and oil sands mature fine tailings using dual polymers.

Degree: MS, Department of Chemical and Materials Engineering, 2014, University of Alberta

URL: https://era.library.ualberta.ca/files/kw52jb71z

► The development of a method to consolidate and dewater Athabasca oil sands mature fine tailings (MFT) is one of the major challenges facing Alberta’s oil… (more)

Subjects/Keywords: Dewatering; Mature Fine Tailings; Flocculation

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APA (6^th Edition):

Haroon, M. H. (2014). Flocculation and dewatering of kaolinite suspensions and oil sands mature fine tailings using dual polymers. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/kw52jb71z

Chicago Manual of Style (16^th Edition):

Haroon, M Hasin. “Flocculation and dewatering of kaolinite suspensions and oil sands mature fine tailings using dual polymers.” 2014. Masters Thesis, University of Alberta. Accessed December 07, 2019. https://era.library.ualberta.ca/files/kw52jb71z.

MLA Handbook (7^th Edition):

Haroon, M Hasin. “Flocculation and dewatering of kaolinite suspensions and oil sands mature fine tailings using dual polymers.” 2014. Web. 07 Dec 2019.

Vancouver:

Haroon MH. Flocculation and dewatering of kaolinite suspensions and oil sands mature fine tailings using dual polymers. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2019 Dec 07]. Available from: https://era.library.ualberta.ca/files/kw52jb71z.

Council of Science Editors:

Haroon MH. Flocculation and dewatering of kaolinite suspensions and oil sands mature fine tailings using dual polymers. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/kw52jb71z

Hong Kong University of Science and Technology

3. Ho, Man Yin. Enhanced electro-osmotic dewatering of fine particle suspension using a rotating electrode.

Degree: 1999, Hong Kong University of Science and Technology

URL: https://doi.org/10.14711/thesis-b651885 ; http://repository.ust.hk/ir/bitstream/1783.1-5869/1/th_redirect.html

► The mechanism of electro-osmotic dewatering (EOD) is quite different from that of mechanical dewatering. Compared with the mechanical dewatering, EOD can be remarkably effective for… (more)

▼ The mechanism of electro-osmotic dewatering (EOD) is quite different from that of mechanical dewatering. Compared with the mechanical dewatering, EOD can be remarkably effective for hardly dewaterable suspensions of very fine particles and gelatinous materials. However, the gradual discontinuity of liquid state in the dewatering material, due to the formation of an unsaturated layer at the anode, causes the electrical blockage rendering EOD no longer effective. Mixing is believed to reduce such an effect. Therefore, a research is conducted to investigate this effect by having the anode rotating. An experimental apparatus was specially designed for this study. It consisted of one acrylic plastic cylinder, one porous stainless steel plate and one circular stainless steel plate. The porous plate acted as the cathode, and the circular plate as the rotating anode. Bentonite sludge, with 9.lwt% initial solid content was used as the model sludge. The rotational speed varied from 0 to 300rpm. Three commercial impellers (axial flow impeller, high-shear dispersing impeller and high-shear radial flow impellers) were also used as rotating anodes and tested for their performances on EOD. The experimental results showed that, by using a flat plate as the rotating anode, the water removed from the sludge increased significantly with the rotational speed initially and reached a plateau at 240rpm. This was believed due to the "fall-off" of the cake from the anode during the rotation. The solid content of the cake could be 23.0wt%, 60% better than the performance of normal EOD. Besides, the excessive suspension added on the top of the anode was found to have a beneficial effect for both water removal and suppression of drier cake formation. It was also found that a constant thickness of the cake formed (about 5mm) was more efficient in electro-osmotic dewatering. The combined effects of anode rotation and dry cake thickness control could remove 56% of the initial moisture within the suspension. It was 37% better than normal EOD. Different commercial impellers performed similarly at the rotational speed of 240rpm. In addition, the value of rpm=60 was found to be the most effective condition for dewatering in the case of using high shear dispersing impeller. At this optimal condition, the water removal enhancement was comparable with those obtained using the rotating plate with the dry cake thickness control. The interesting experimental results were well explained following the fundamental analysis of EOD.

Subjects/Keywords: Electroosmotic dewatering

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APA (6^th Edition):

Ho, M. Y. (1999). Enhanced electro-osmotic dewatering of fine particle suspension using a rotating electrode. (Thesis). Hong Kong University of Science and Technology. Retrieved from https://doi.org/10.14711/thesis-b651885 ; http://repository.ust.hk/ir/bitstream/1783.1-5869/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ho, Man Yin. “Enhanced electro-osmotic dewatering of fine particle suspension using a rotating electrode.” 1999. Thesis, Hong Kong University of Science and Technology. Accessed December 07, 2019. https://doi.org/10.14711/thesis-b651885 ; http://repository.ust.hk/ir/bitstream/1783.1-5869/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ho, Man Yin. “Enhanced electro-osmotic dewatering of fine particle suspension using a rotating electrode.” 1999. Web. 07 Dec 2019.

Vancouver:

Ho MY. Enhanced electro-osmotic dewatering of fine particle suspension using a rotating electrode. [Internet] [Thesis]. Hong Kong University of Science and Technology; 1999. [cited 2019 Dec 07]. Available from: https://doi.org/10.14711/thesis-b651885 ; http://repository.ust.hk/ir/bitstream/1783.1-5869/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ho MY. Enhanced electro-osmotic dewatering of fine particle suspension using a rotating electrode. [Thesis]. Hong Kong University of Science and Technology; 1999. Available from: https://doi.org/10.14711/thesis-b651885 ; http://repository.ust.hk/ir/bitstream/1783.1-5869/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

4. Keles, Serhat. Fine Coal Dewatering Using Hyperbaric Centrifugation.

Degree: PhD, Mining and Minerals Engineering, 2010, Virginia Tech

URL: http://hdl.handle.net/10919/37807

► The solid-solid separation processes employed by modern coal preparation plants require large amounts of process water that must be removed from the surfaces of particles… (more)

▼ The solid-solid separation processes employed by modern coal preparation plants require large amounts of process water that must be removed from the surfaces of particles using mechanical dewatering equipment. Unfortunately, the existing processes that are used to dewater fine particles are inefficient in terms of moisture reduction and/or solids recovery. Many coal preparation plants are forced to discard fine coal particles because of the inability of existing technologies to reduce the moisture content of this product to an acceptable level. In light of this problem, a new ultrafine dewatering process called hyperbaric filter centrifugation (HFC) has been developed. This novel method combines centrifugation and pressure filtration within a single process to substantially reduce moistures over what can be achieved using conventional dewatering systems. In the current study, steady-state and dynamic dewatering models were developed in order to be able to simulate the behavior of the HFC technology. The steady-state model, which was based on grain-size properties, used empirical expressions to predict product moistures. On the other hand, the dynamic model was based on fundamental theories of filtration and centrifugation. Although the dynamic model provided a better understanding of the working principles of the process, the steady-state grain model produced more accurate equilibrium moisture predictions. Therefore, the steady-state model was used to further investigate the effects of several parameters on cake moistures. As such, the steady-state model was useful for scale up and design purposes. The steady-state dewatering model was also used to perform an economical analysis of potential applications of the HFC technology. The model was used to investigate a variety of new circuit designs that have the potential to be commercially applied in the coal industry. The results clearly showed that this new technology would allow coal companies to process difficult-to-dewater ultrafines using the HFC process, while coarser solids would be more appropriately dewatered using conventional technologies such as vacuum filters or screenbowl centrifuges. This â split dewateringâ concept would provide substantially higher profitability due to lower moistures and higher recoveries of ultrafine solids than could be achieved using a single dewatering process. Laboratory- and pilot-scale versions of this technology has been constructed and tested at the facilities of Mining & Minerals Engineering Department of Virginia Tech. Results of this testing program showed that 30-50% lower moisture values than the ones obtained using conventional mechanical dewatering processes could be achieved with the HFC technology. Based on these promising results, a pilot-scale prototype unit, which was tested successfully at several commercial U.S. coal plants, was also constructed by Decanter Machine, Inc. Finally, the process of developing of this novel technology was successfully completed with the sale of the first full-scale commercial… Advisors/Committee Members: Luttrell, Gerald H. (committeechair), Adel, Gregory T. (committee member), Honaker, Ricky Q. (committee member), Yoon, Roe-Hoan (committeecochair).

Subjects/Keywords: Filtration; Hyperbaric; Centrifugation; Dewatering

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APA (6^th Edition):

Keles, S. (2010). Fine Coal Dewatering Using Hyperbaric Centrifugation. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/37807

Chicago Manual of Style (16^th Edition):

Keles, Serhat. “Fine Coal Dewatering Using Hyperbaric Centrifugation.” 2010. Doctoral Dissertation, Virginia Tech. Accessed December 07, 2019. http://hdl.handle.net/10919/37807.

MLA Handbook (7^th Edition):

Keles, Serhat. “Fine Coal Dewatering Using Hyperbaric Centrifugation.” 2010. Web. 07 Dec 2019.

Vancouver:

Keles S. Fine Coal Dewatering Using Hyperbaric Centrifugation. [Internet] [Doctoral dissertation]. Virginia Tech; 2010. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/10919/37807.

Council of Science Editors:

Keles S. Fine Coal Dewatering Using Hyperbaric Centrifugation. [Doctoral Dissertation]. Virginia Tech; 2010. Available from: http://hdl.handle.net/10919/37807

Linköping University

5. Eriksson, Linnea. Evaluating digestate processing methods at Linköping biogas plant : A resource efficient perspective.

Degree: Environmental Technology and Management, 2016, Linköping University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129763

► Production of biogas is one of several alternatives to meet sustainable energy solutions and waste management. However, managing the by-product (digestate) can be problematic… (more)

▼ Production of biogas is one of several alternatives to meet sustainable energy solutions and waste management. However, managing the by-product (digestate) can be problematic with its high handling costs. Digestate from wet co-digestion biogas plants contains large volumes of water, causing high transportation costs and low concentration of the valuable nutrients. An alternative to try and reduce the associated costs is by processing the digestate. Processing the digestate for volume reduction allow for more economic and resource efficient ways of handling the product. This master thesis was performed on an initiative from Tekniska verken AB and address digestate handling from Linköping biogas plant, a large co-digestion biogas plant in Sweden. The project aimed to find a feasible, more resource efficient management of their digestate by looking at digestate processing alternatives.The approach systematically evaluated a large number of processing techniques by both literature and communication with TvAB or experts. A selection of techniques were further evaluated were studies in laboratory and a market analysis on digestate provided complementary information, aiding the economical evaluation. Results suggest that processing by centrifuge is a viable, economic option when digestate management is costly and a liquid fraction can be recirculated in the process. It has the potential to significantly reducing digestate management costs. Other processing alternatives may be beneficial if transportation distance can be greatly reduced and/or synergies can be found, but the findings in this project suggest that only treatment with centrifuge is of interest. The results are subject to a number of conditions (such as size of the plant) and assumptions (such as recirculation of a liquid fraction) and therefore need individual adaption to be applicable at any specific plant. Conclusive remarks are that although site specific conditions affect the choice of processing, a project such as this may help reducing the necessary time spent on evaluation. Both research process and results may provide valuable findings for similar evaluations in any industry.

Subjects/Keywords: Digestate; bio-fertilizer; dewatering; biogas

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APA (6^th Edition):

Eriksson, L. (2016). Evaluating digestate processing methods at Linköping biogas plant : A resource efficient perspective. (Thesis). Linköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129763

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Eriksson, Linnea. “Evaluating digestate processing methods at Linköping biogas plant : A resource efficient perspective.” 2016. Thesis, Linköping University. Accessed December 07, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129763.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Eriksson, Linnea. “Evaluating digestate processing methods at Linköping biogas plant : A resource efficient perspective.” 2016. Web. 07 Dec 2019.

Vancouver:

Eriksson L. Evaluating digestate processing methods at Linköping biogas plant : A resource efficient perspective. [Internet] [Thesis]. Linköping University; 2016. [cited 2019 Dec 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129763.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Eriksson L. Evaluating digestate processing methods at Linköping biogas plant : A resource efficient perspective. [Thesis]. Linköping University; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129763

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McMaster University

6. Westhaver, Kurt. Development of Dewatering Textile Materials Incorporating Slit-Pore Geometries.

Degree: MASc, 2018, McMaster University

URL: http://hdl.handle.net/11375/23753

►

The treatment of municipal, industrial and agricultural wastewater produces a semi-liquid mixture known as sludge. The costs associated with pumping, transporting, treating, storing, and disposing… (more)

▼

The treatment of municipal, industrial and agricultural wastewater produces a semi-liquid mixture known as sludge. The costs associated with pumping, transporting, treating, storing, and disposing of sludge are significant. Therefore, sludge dewatering techniques are employed to increase the solids content of the material by separating the solid and liquid components, thus reducing the overall volume requiring further handling. Non-mechanical dewatering methods require large areas of land and favorable climatic conditions, while mechanical dewatering technologies require significant capital investment and ongoing operation and maintenance by highly trained personnel. Due to these shortcomings, the conventional methods of sludge dewatering are not applicable to scenarios where: the quantity of sludge is small, there is limited budget, there are land restrictions, or dewatering is performed seasonally. An alternative approach that has recently attracted considerable attention is the use of dewatering fabrics; specially engineered textiles supplied in the form of very large bags into which the sludge is pumped. The concept itself is simple, pressure inside the bag pushes the free water through the fabric while the solid material is retained within. Unfortunately, these products have exhibited poor dewatering performance for certain feed materials. In this work, a series of ‘next-generation’ engineered dewatering fabrics featuring elongated ‘slit’ pores were produced using laser cutting techniques. A comprehensive analysis of the effect of the filter properties on dewatering performance was performed using sludge sourced from two different operations: municipal wastewater treatment and precious metal mining.

Thesis

Master of Applied Science (MASc)

In recent years, the use of engineered dewatering fabrics has emerged as a viable alternative to conventional methods of sludge dewatering in numerous application areas including municipal wastewater, mining, and pulp and paper. Previous studies have focused on the development of empirical ratios between dewatering performance and the porous properties of the textile material. The limitation of this approach is that the latter is difficult to characterize using currently available techniques due to the complex, nonuniform pore structure of conventional woven and nonwoven dewatering fabrics. In this study, a series of dewatering fabrics were produced using advanced microfabrication techniques featuring well-defined slit-pore geometries. Full-factorial design-of-experiment frameworks were employed to evaluate the effects of slit-pore dimensions and slit-pore spacing on cake layer development and key dewatering performance metrics. Laboratory scale dewatering performance tests were performed using both anaerobic digested sludge from the Woodward Avenue Wastewater Treatment Plant in Hamilton, Ontario and metal precipitate sludge from a nickel-copper mine in Ontario, Canada. The results from this study provide new insights into the importance of the cake layer in geotextile…

Advisors/Committee Members: Latulippe, David, Chemical Engineering.

Subjects/Keywords: Geotextile; Dewatering; Sludge; Wastewater

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Westhaver, K. (2018). Development of Dewatering Textile Materials Incorporating Slit-Pore Geometries. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/23753

Chicago Manual of Style (16^th Edition):

Westhaver, Kurt. “Development of Dewatering Textile Materials Incorporating Slit-Pore Geometries.” 2018. Masters Thesis, McMaster University. Accessed December 07, 2019. http://hdl.handle.net/11375/23753.

MLA Handbook (7^th Edition):

Westhaver, Kurt. “Development of Dewatering Textile Materials Incorporating Slit-Pore Geometries.” 2018. Web. 07 Dec 2019.

Vancouver:

Westhaver K. Development of Dewatering Textile Materials Incorporating Slit-Pore Geometries. [Internet] [Masters thesis]. McMaster University; 2018. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/11375/23753.

Council of Science Editors:

Westhaver K. Development of Dewatering Textile Materials Incorporating Slit-Pore Geometries. [Masters Thesis]. McMaster University; 2018. Available from: http://hdl.handle.net/11375/23753

7. Das, Dipesh. Determination Of Optimum Polymer Dose For Grand Forks Wastewater Treatment Plant Lagoon Sludge Dewatering.

Degree: MS, Civil Engineering, 2013, University of North Dakota

URL: https://commons.und.edu/theses/1412

► The Grand Forks Waste Water Treatment Plant (GFWWTP) is currently sending its waste activated sludge (WAS) from the activated sludge treatment process to an… (more)

Subjects/Keywords: Biosolids; Dewatering; GFWWTP; Lagoon; Polymer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Das, D. (2013). Determination Of Optimum Polymer Dose For Grand Forks Wastewater Treatment Plant Lagoon Sludge Dewatering. (Masters Thesis). University of North Dakota. Retrieved from https://commons.und.edu/theses/1412

Chicago Manual of Style (16^th Edition):

Das, Dipesh. “Determination Of Optimum Polymer Dose For Grand Forks Wastewater Treatment Plant Lagoon Sludge Dewatering.” 2013. Masters Thesis, University of North Dakota. Accessed December 07, 2019. https://commons.und.edu/theses/1412.

MLA Handbook (7^th Edition):

Das, Dipesh. “Determination Of Optimum Polymer Dose For Grand Forks Wastewater Treatment Plant Lagoon Sludge Dewatering.” 2013. Web. 07 Dec 2019.

Vancouver:

Das D. Determination Of Optimum Polymer Dose For Grand Forks Wastewater Treatment Plant Lagoon Sludge Dewatering. [Internet] [Masters thesis]. University of North Dakota; 2013. [cited 2019 Dec 07]. Available from: https://commons.und.edu/theses/1412.

Council of Science Editors:

Das D. Determination Of Optimum Polymer Dose For Grand Forks Wastewater Treatment Plant Lagoon Sludge Dewatering. [Masters Thesis]. University of North Dakota; 2013. Available from: https://commons.und.edu/theses/1412

KTH

8. NEIRA, HUGO ALEJANDRO PULGAR. Inverkan av avvattningshastighet på formation och styrka på ark med låg ytvikt.

Degree: Chemical Science and Engineering (CHE), 2015, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172445

► For this thesis project, a method to analyze the dewatering time for the drainage process during laboratory sheet making on a Finnish sheet former… (more)

Subjects/Keywords: Tissue papper; dewatering time; dewatering speed; Laboratory sheet and sheet formation.

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APA (6^th Edition):

NEIRA, H. A. P. (2015). Inverkan av avvattningshastighet på formation och styrka på ark med låg ytvikt. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172445

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

NEIRA, HUGO ALEJANDRO PULGAR. “Inverkan av avvattningshastighet på formation och styrka på ark med låg ytvikt.” 2015. Thesis, KTH. Accessed December 07, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172445.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

NEIRA, HUGO ALEJANDRO PULGAR. “Inverkan av avvattningshastighet på formation och styrka på ark med låg ytvikt.” 2015. Web. 07 Dec 2019.

Vancouver:

NEIRA HAP. Inverkan av avvattningshastighet på formation och styrka på ark med låg ytvikt. [Internet] [Thesis]. KTH; 2015. [cited 2019 Dec 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172445.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

NEIRA HAP. Inverkan av avvattningshastighet på formation och styrka på ark med låg ytvikt. [Thesis]. KTH; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172445

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. Pinto, Thiago César de Souza. Aplicação de técnicas clássicas para polpas não floculadas de dimensionamento de espessadores aplicadas a suspensões de salmoura e lodo biológico.

Degree: Mestrado, Engenharia Mineral, 2007, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3134/tde-01042009-101018/ ;

►

O espessamento é uma operação unitária que tem como finalidade separar, por diferença de massa específica entre o sólido e o líquido, sólidos suspensos em… (more)

▼

O espessamento é uma operação unitária que tem como finalidade separar, por diferença de massa específica entre o sólido e o líquido, sólidos suspensos em meio fluido, pela ação da gravidade. É bastante empregado industrialmente em processos contínuos no adensamento de polpas e minérios, em unidades com reação de precipitação e no tratamento de efluentes, dentre outros. Os equipamentos que realizam esta operação, chamados espessadores, são, em geral, tanques abertos de formato cilíndrico, instalados no eixo vertical com a entrada da suspensão na parte superior central, de fundo ligeiramente cônico para a retirada da polpa espessada e calha circulando o topo para descarga do líquido clarificado. As várias técnicas de projeto destas unidades contínuas são comumente baseadas em ensaios de bancada com provetas. Não é raro ocorrerem para os mesmos dados experimentais, áreas de projeto com desvios superiores a 50%. O presente trabalho visou verificar a validade das técnicas de seleção de TALMADGE-FITCH, ROBERTS e FLUXO DE SÓLIDOS, para o dimensionamento de espessadores industriais com salmoura e lodo biológico. Foram realizados para este fim, ensaios de espessamento em provetas com as próprias suspensões industriais, calculadas as áreas pelas técnicas supracitadas e comparadas com os resultados das secções dos equipamentos contínuos industriais. Os desvios médios dos diâmetros para cada técnica em relação ao espessadores industriais apresentaram contra a segurança dos equipamentos um valor de 42% para o método de Talmadge-Fitch, 45,5% para Roberts e 43,5% para o método do Fluxo de sólidos. Concluiu-se, para as condições estudadas, que os métodos de provetas utilizados forneceram valores na mesma ordem de grandeza e que requerem um fator de escala para o dimensionamento das unidades industriais contínuas.

Thickening is a unit operation that has the goal of solid-liquid separation. The principle of this separation is the difference of specific weight between solid and liquid. This unit operation is used in mineral industries, to ore concentrate, wastewater, and others. The tanks called thickeners are usually open, with the feed on the top of the equipment. The solids discharge is done trough the bottom in a conical shape. The most techniques of sizing thickeners are based on graduated cylinders, and it is a common get result that has a difference area in about 50%. This happens because security coefficient, difficulties for results interpretation and scales factors. This research has the goal to apply the techniques of selection of Solids Flux, Roberts and Talmadge-Fitch in graduated cylinders. These methods are classical for thickener sizing. A comparison has been made between the results by those methods with the data obtained from continuous industrial units for salt solution and biological brine. The shunting line for the techniques obtained was 42% for Talmadge-Fitch, 45,5% for Roberts and 43,5% for Solid Flux in the relationship with industrial thickeners. In conclusion, for the studied condition, all methods showed…

Advisors/Committee Members: Lima, José Renato Baptista de.

Subjects/Keywords: Desaguamento; Dewatering; Mineral processing; Processamento mineral; Thickening

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pinto, T. C. d. S. (2007). Aplicação de técnicas clássicas para polpas não floculadas de dimensionamento de espessadores aplicadas a suspensões de salmoura e lodo biológico. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3134/tde-01042009-101018/ ;

Chicago Manual of Style (16^th Edition):

Pinto, Thiago César de Souza. “Aplicação de técnicas clássicas para polpas não floculadas de dimensionamento de espessadores aplicadas a suspensões de salmoura e lodo biológico.” 2007. Masters Thesis, University of São Paulo. Accessed December 07, 2019. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-01042009-101018/ ;.

MLA Handbook (7^th Edition):

Pinto, Thiago César de Souza. “Aplicação de técnicas clássicas para polpas não floculadas de dimensionamento de espessadores aplicadas a suspensões de salmoura e lodo biológico.” 2007. Web. 07 Dec 2019.

Vancouver:

Pinto TCdS. Aplicação de técnicas clássicas para polpas não floculadas de dimensionamento de espessadores aplicadas a suspensões de salmoura e lodo biológico. [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2019 Dec 07]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3134/tde-01042009-101018/ ;.

Council of Science Editors:

Pinto TCdS. Aplicação de técnicas clássicas para polpas não floculadas de dimensionamento de espessadores aplicadas a suspensões de salmoura e lodo biológico. [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/3/3134/tde-01042009-101018/ ;

University of Alberta

10. Zhang, Chenxi. Cross flow filtration of oil sands total tailings.

Degree: MS, Department of Civil and Environmental Engineering, 2010, University of Alberta

URL: https://era.library.ualberta.ca/files/x346d5748

► This research is a follow up to preliminary studies reported by Beier and Sego (2008) and the objective is to investigate laboratory scale dewatering of… (more)

Subjects/Keywords: cross flow filtration, dewatering, oil sands tailings

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APA (6^th Edition):

Zhang, C. (2010). Cross flow filtration of oil sands total tailings. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/x346d5748

Chicago Manual of Style (16^th Edition):

Zhang, Chenxi. “Cross flow filtration of oil sands total tailings.” 2010. Masters Thesis, University of Alberta. Accessed December 07, 2019. https://era.library.ualberta.ca/files/x346d5748.

MLA Handbook (7^th Edition):

Zhang, Chenxi. “Cross flow filtration of oil sands total tailings.” 2010. Web. 07 Dec 2019.

Vancouver:

Zhang C. Cross flow filtration of oil sands total tailings. [Internet] [Masters thesis]. University of Alberta; 2010. [cited 2019 Dec 07]. Available from: https://era.library.ualberta.ca/files/x346d5748.

Council of Science Editors:

Zhang C. Cross flow filtration of oil sands total tailings. [Masters Thesis]. University of Alberta; 2010. Available from: https://era.library.ualberta.ca/files/x346d5748

The Ohio State University

11. Bartkowiak, Brandon Michael. Ground-water flow modeling of the impact of quarry dewatering on water levels in the fractured carbonate aquifer, Kelleys Island, Ohio.

Degree: MS, Geological Sciences, 2009, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1245339592

► To aid in determining the impact of quarry dewatering on Kelleys Island, Ohio, three steady-state, numerical models were constructed using MODFLOW. Paleozoic aged carbonate… (more)

Subjects/Keywords: Geology; Kelleys Island; quarry; dewatering; MODFLOW

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APA (6^th Edition):

Bartkowiak, B. M. (2009). Ground-water flow modeling of the impact of quarry dewatering on water levels in the fractured carbonate aquifer, Kelleys Island, Ohio. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1245339592

Chicago Manual of Style (16^th Edition):

Bartkowiak, Brandon Michael. “Ground-water flow modeling of the impact of quarry dewatering on water levels in the fractured carbonate aquifer, Kelleys Island, Ohio.” 2009. Masters Thesis, The Ohio State University. Accessed December 07, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1245339592.

MLA Handbook (7^th Edition):

Bartkowiak, Brandon Michael. “Ground-water flow modeling of the impact of quarry dewatering on water levels in the fractured carbonate aquifer, Kelleys Island, Ohio.” 2009. Web. 07 Dec 2019.

Vancouver:

Bartkowiak BM. Ground-water flow modeling of the impact of quarry dewatering on water levels in the fractured carbonate aquifer, Kelleys Island, Ohio. [Internet] [Masters thesis]. The Ohio State University; 2009. [cited 2019 Dec 07]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1245339592.

Council of Science Editors:

Bartkowiak BM. Ground-water flow modeling of the impact of quarry dewatering on water levels in the fractured carbonate aquifer, Kelleys Island, Ohio. [Masters Thesis]. The Ohio State University; 2009. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1245339592

University of Alberta

12. Zhu,Ying. Cationic and Anionic Dual Polymer Pairs for Mature Fine Tailings Flocculation and Dewatering.

Degree: MS, Department of Chemical and Materials Engineering, 2015, University of Alberta

URL: https://era.library.ualberta.ca/files/cns0646039

► The accumulation of oil sands tailings poses serious environmental issues in Alberta, Canada. In the tailings ponds, the fine clays and residual bitumen form the… (more)

▼ The accumulation of oil sands tailings poses serious environmental issues in Alberta, Canada. In the tailings ponds, the fine clays and residual bitumen form the so-called mature fine tailings (MFT) which contain 30~40 wt% fine solid particles primarily below 44 µm in size, 1~3 wt% residual bitumen with the balance water. Without any physical or chemical treatment, the MFT remains as a stable suspension in tailings ponds indefinitely. Adding a polymer as a process aid to treat the oil sands tailings has been investigated for many years to cause fine solids to flocculate and thus accelerate dewatering. However, the performance of single polymer treatment is generally unsatisfactory. Recent studies in sewage treatment suggest that a dual polymer method, in which two different polymers are added in sequence, has a better flocculation performance. In this study, the use of dual polymer pairs in the flocculation and dewatering of MFT was investigated. A cationic polydiallyldimethylammonium chloride (polyDADMAC) polymer (Alcomer 7115, from BASF) and an anionic linear polyacrylamide polymer (A3335, from SNF) were found to be an effective combination in MFT dewatering treatment by filtration. The effects of polymer dosage, filtration pressure and the sequence of polymer addition were studied. Capillary suction time (CST) and specific resistance to filtration (SRF) were measured to evaluate the dewaterability of treated MFT. From the experimental data, MFT treated with the polymer combination of Alcomer 7115 and A3335 can give low CST results around 50 s, compared with around 3000 s of untreated MFT. Also the SRF was decreased from a magnitude of 1014 m/kg to 1012 ~ 1013 m/kg, indicating treated MFT being relatively much easier to dewater. Cryogenic scanning electron microscopic (Cryo-SEM) images of the treated MFT were taken to show the morphology of the MFT with or without treatment with either a single polymer or dual polymer pairs. The results demonstrated that the pore sizes are larger when the dual polymer pairs were used, implying higher dewaterability of MFT in this case.

Subjects/Keywords: dewatering; dual polymer treatment; mature fine tailings

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhu,Ying. (2015). Cationic and Anionic Dual Polymer Pairs for Mature Fine Tailings Flocculation and Dewatering. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/cns0646039

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

Zhu,Ying. “Cationic and Anionic Dual Polymer Pairs for Mature Fine Tailings Flocculation and Dewatering.” 2015. Masters Thesis, University of Alberta. Accessed December 07, 2019. https://era.library.ualberta.ca/files/cns0646039.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

Zhu,Ying. “Cationic and Anionic Dual Polymer Pairs for Mature Fine Tailings Flocculation and Dewatering.” 2015. Web. 07 Dec 2019.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

Zhu,Ying. Cationic and Anionic Dual Polymer Pairs for Mature Fine Tailings Flocculation and Dewatering. [Internet] [Masters thesis]. University of Alberta; 2015. [cited 2019 Dec 07]. Available from: https://era.library.ualberta.ca/files/cns0646039.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

Zhu,Ying. Cationic and Anionic Dual Polymer Pairs for Mature Fine Tailings Flocculation and Dewatering. [Masters Thesis]. University of Alberta; 2015. Available from: https://era.library.ualberta.ca/files/cns0646039

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

McMaster University

13. Cobbledick, Jeffrey. OPTIMIZING POLYMER ASSISTED DEWATERING IN RECUPERATIVE THICKENING VIA A LAB-SCALE SYSTEM FOR ENHANCED BIOGAS PRODUCTION IN ANAEROBIC DIGESTION PROCESSES.

Degree: MASc, 2016, McMaster University

URL: http://hdl.handle.net/11375/19012

►

There is growing interest in the use of high performance anaerobic digestion (AD) processes for the production of biogas at wastewater treatment facilities to offset… (more)

▼

There is growing interest in the use of high performance anaerobic digestion (AD) processes for the production of biogas at wastewater treatment facilities to offset the energy demands associated with wastewater treatment. Recuperative thickening (RT) is a promising technique which involves recycling a portion of the digested solids back to the incoming feed. In general there exists a significant number of knowledge gaps in the field of RT because the studies that have been conducted to date have almost exclusively occurred in pilot or full scale trials; this approach greatly limits the amount of process optimization that can be done in a given trial. In this work, a detailed and comprehensive study of RT processes was conducted at the lab scale; a demonstration of the optimization of polymer assisted dewatering is given and biogas production and quality monitored. Two custom designed digesters (capacity = 1.5 L) were operated in parallel with one acting as a ‘control’ digester and the other operating under a semi-batch RT mode; both digesters were also operated in parallel under RT with alternative polymer flocculants. There were no significant changes in the overall biogas methane composition; however the RT digester had an average biogas productivity over two times higher than the control one. It was found that the recycling of the polymer flocculant back into the RT digester resulted in a significant improvement in dewatering performance. At the highest polymer concentration tested, all polymer flocculants demonstrated equivalent dewatering performance achieving over 6 times lower CST’s than the control; at lower polymer concentrations the 4516 polymer flocculant had superior dewatering performance. Thus, there exists an opportunity to decrease the overall consumption of polymer flocculants through judicious selection of the flocculant and the dose that is used both for the thickening and end-stage dewatering processes in RT digesters.

Thesis

Master of Applied Science (MASc)

In wastewater treatment (WWT), solid wastes are treated using a technique called anaerobic digestion (AD) which involves the conversion of solids in biogas by anaerobic bacteria. Biogas is a mixture of mostly methane and carbon dioxide and can be used as a fuel source for energy production. There’s growing interest in the use of high performance AD processes for the production of biogas at WWT facilities to offset the energy demands associated with WWT. Recuperative thickening (RT) is a promising technique which involves recycling a portion of the digested solids back to the digester. In this work, a detailed and comprehensive study of RT processes was conducted at the lab scale; a demonstration of the optimization of polymer assisted dewatering is given and biogas production and quality monitored. Two 1.5 L custom designed digesters were operated in parallel one as a ‘control’ and the other operating under a semi-batch RT.

Advisors/Committee Members: Latulippe, David, Chemical Engineering.

Subjects/Keywords: Anaerobic Digestion; Dewatering; Polymer Optimization; Biogas Production

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APA (6^th Edition):

Cobbledick, J. (2016). OPTIMIZING POLYMER ASSISTED DEWATERING IN RECUPERATIVE THICKENING VIA A LAB-SCALE SYSTEM FOR ENHANCED BIOGAS PRODUCTION IN ANAEROBIC DIGESTION PROCESSES. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/19012

Chicago Manual of Style (16^th Edition):

Cobbledick, Jeffrey. “OPTIMIZING POLYMER ASSISTED DEWATERING IN RECUPERATIVE THICKENING VIA A LAB-SCALE SYSTEM FOR ENHANCED BIOGAS PRODUCTION IN ANAEROBIC DIGESTION PROCESSES.” 2016. Masters Thesis, McMaster University. Accessed December 07, 2019. http://hdl.handle.net/11375/19012.

MLA Handbook (7^th Edition):

Cobbledick, Jeffrey. “OPTIMIZING POLYMER ASSISTED DEWATERING IN RECUPERATIVE THICKENING VIA A LAB-SCALE SYSTEM FOR ENHANCED BIOGAS PRODUCTION IN ANAEROBIC DIGESTION PROCESSES.” 2016. Web. 07 Dec 2019.

Vancouver:

Cobbledick J. OPTIMIZING POLYMER ASSISTED DEWATERING IN RECUPERATIVE THICKENING VIA A LAB-SCALE SYSTEM FOR ENHANCED BIOGAS PRODUCTION IN ANAEROBIC DIGESTION PROCESSES. [Internet] [Masters thesis]. McMaster University; 2016. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/11375/19012.

Council of Science Editors:

Cobbledick J. OPTIMIZING POLYMER ASSISTED DEWATERING IN RECUPERATIVE THICKENING VIA A LAB-SCALE SYSTEM FOR ENHANCED BIOGAS PRODUCTION IN ANAEROBIC DIGESTION PROCESSES. [Masters Thesis]. McMaster University; 2016. Available from: http://hdl.handle.net/11375/19012

McGill University

14. Lightfoot, Dennis G. (Dennis George). Combined fields (electro-osmosis and pressure) dewatering of kelp.

Degree: MS, Department of Agricultural Engineering., 1991, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile68202.pdf

►

The world's brown marine algae, or kelps, have a great potential for agricultural use. Over 14 million tonnes of kelp are estimated to be available… (more)

Subjects/Keywords: Kelps.; Electroosmotic dewatering.

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APA (6^th Edition):

Lightfoot, D. G. (. G. (1991). Combined fields (electro-osmosis and pressure) dewatering of kelp. (Masters Thesis). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile68202.pdf

Chicago Manual of Style (16^th Edition):

Lightfoot, Dennis G (Dennis George). “Combined fields (electro-osmosis and pressure) dewatering of kelp.” 1991. Masters Thesis, McGill University. Accessed December 07, 2019. http://digitool.library.mcgill.ca/thesisfile68202.pdf.

MLA Handbook (7^th Edition):

Lightfoot, Dennis G (Dennis George). “Combined fields (electro-osmosis and pressure) dewatering of kelp.” 1991. Web. 07 Dec 2019.

Vancouver:

Lightfoot DG(G. Combined fields (electro-osmosis and pressure) dewatering of kelp. [Internet] [Masters thesis]. McGill University; 1991. [cited 2019 Dec 07]. Available from: http://digitool.library.mcgill.ca/thesisfile68202.pdf.

Council of Science Editors:

Lightfoot DG(G. Combined fields (electro-osmosis and pressure) dewatering of kelp. [Masters Thesis]. McGill University; 1991. Available from: http://digitool.library.mcgill.ca/thesisfile68202.pdf

Virginia Tech

15. Freeland, Chad Lee. Low Temperature Drying of Ultrafine Coal.

Degree: MS, Mining and Minerals Engineering, 2010, Virginia Tech

URL: http://hdl.handle.net/10919/76750

► A new dewatering technology, called low temperature drying, has been developed to remove water from ultrafine (minus 325 mesh) coal particles. The process subjects partially… (more)

Subjects/Keywords: ultrafine coal; coal dewatering; low temperature drying

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APA (6^th Edition):

Freeland, C. L. (2010). Low Temperature Drying of Ultrafine Coal. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/76750

Chicago Manual of Style (16^th Edition):

Freeland, Chad Lee. “Low Temperature Drying of Ultrafine Coal.” 2010. Masters Thesis, Virginia Tech. Accessed December 07, 2019. http://hdl.handle.net/10919/76750.

MLA Handbook (7^th Edition):

Freeland, Chad Lee. “Low Temperature Drying of Ultrafine Coal.” 2010. Web. 07 Dec 2019.

Vancouver:

Freeland CL. Low Temperature Drying of Ultrafine Coal. [Internet] [Masters thesis]. Virginia Tech; 2010. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/10919/76750.

Council of Science Editors:

Freeland CL. Low Temperature Drying of Ultrafine Coal. [Masters Thesis]. Virginia Tech; 2010. Available from: http://hdl.handle.net/10919/76750

Luleå University of Technology

16. Nyberg, Per. Tapuli Mine Pre-Development : Dike Construction and Dewatering of the Starter Pit.

Degree: 2011, Luleå University of Technology

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-45869

►

On December 20th, 2010, Northland Resources AB was approved to begin mining iron in the ore body Tapuli, located in Kaunisvaara, north of Pajala.… (more)

Subjects/Keywords: Technology; Teknik; Dike; Dewatering; Mine Development; Tapuli

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APA (6^th Edition):

Nyberg, P. (2011). Tapuli Mine Pre-Development : Dike Construction and Dewatering of the Starter Pit. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-45869

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nyberg, Per. “Tapuli Mine Pre-Development : Dike Construction and Dewatering of the Starter Pit.” 2011. Thesis, Luleå University of Technology. Accessed December 07, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-45869.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nyberg, Per. “Tapuli Mine Pre-Development : Dike Construction and Dewatering of the Starter Pit.” 2011. Web. 07 Dec 2019.

Vancouver:

Nyberg P. Tapuli Mine Pre-Development : Dike Construction and Dewatering of the Starter Pit. [Internet] [Thesis]. Luleå University of Technology; 2011. [cited 2019 Dec 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-45869.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nyberg P. Tapuli Mine Pre-Development : Dike Construction and Dewatering of the Starter Pit. [Thesis]. Luleå University of Technology; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-45869

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oklahoma State University

17. Mukherjee, Anuradha. Farm Ethanol Dewatering: Detailed Design Of Distillation Unit.

Degree: School of Chemical Engineering, 2009, Oklahoma State University

URL: http://hdl.handle.net/11244/9650

► Sweet sorghum offers a range of advantages due to its low water input, high carbohydrate yield and drought tolerant characteristics. The team at the School… (more)

▼ Sweet sorghum offers a range of advantages due to its low water input, high carbohydrate yield and drought tolerant characteristics. The team at the School of Bio-systems & Agricultural Engineering at Oklahoma State University has demonstrated the ability to harvest, express, and ferment sweet sorghum on-farm. The fermentation product is an aqueous 6 - 10 wt % ethanol product. The high concentration of water (90+ wt %) in the fermentation product provides a strong incentive to perform on-farm dewatering to replace high costs for transportation to a central processing facility. Furthermore, to ensure successful recovery of the ethanol obtained from fermenting sweet sorghum on farm, a small scale dewatering facility needs to be established. Rigorous, first-principles simulations have been created to provide the material and energy balances required for equipment design. Based on the findings from the simulations, the detailed design of a two-column dewatering system capable of producing a 190 proof ethanol product was completed. The design addresses contemporary issues of water requirements and waste disposal. The proposed design eliminates the need for well water make-up, required for cooling or steam generation, with air-cooling and reboiler substitutes. The system is designed to process approximately 250 gph of fermentation product in two 12-inch diameter columns, the smallest practical size that can be implemented on a farm. With a state-of-the-art demonstration unit future studies can be geared towards data generation and analysis required for economic and technical optimization of an on-farm ethanol production facility. Results from this work could have significant economic impact on agriculture. The role of the farmer will expand from feedstock supplier to that of fuel producer and increase the economic opportunities for local communities. Advisors/Committee Members: Whiteley, James R. (advisor), Bellmer, Danielle D. (committee member), Fahlenkamp, Heather (committee member).

Subjects/Keywords: design; dewatering; distillation; ethanol; on-farm; separation

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APA (6^th Edition):

Mukherjee, A. (2009). Farm Ethanol Dewatering: Detailed Design Of Distillation Unit. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/9650

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mukherjee, Anuradha. “Farm Ethanol Dewatering: Detailed Design Of Distillation Unit.” 2009. Thesis, Oklahoma State University. Accessed December 07, 2019. http://hdl.handle.net/11244/9650.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mukherjee, Anuradha. “Farm Ethanol Dewatering: Detailed Design Of Distillation Unit.” 2009. Web. 07 Dec 2019.

Vancouver:

Mukherjee A. Farm Ethanol Dewatering: Detailed Design Of Distillation Unit. [Internet] [Thesis]. Oklahoma State University; 2009. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/11244/9650.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mukherjee A. Farm Ethanol Dewatering: Detailed Design Of Distillation Unit. [Thesis]. Oklahoma State University; 2009. Available from: http://hdl.handle.net/11244/9650

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

18. Gupta, Nikhil. Development of a Novel Fine Coal Cleaning and Dewatering Technology.

Degree: PhD, Mining Engineering, 2014, Virginia Tech

URL: http://hdl.handle.net/10919/64262

► The cleaning and dewatering of ultrafine (minus 44 micron) coal slurries is one of the biggest challenges faced by coal industry. Existing commercial technologies cannot… (more)

Subjects/Keywords: fine coal; dewatering; processing; scale-up

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gupta, N. (2014). Development of a Novel Fine Coal Cleaning and Dewatering Technology. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/64262

Chicago Manual of Style (16^th Edition):

Gupta, Nikhil. “Development of a Novel Fine Coal Cleaning and Dewatering Technology.” 2014. Doctoral Dissertation, Virginia Tech. Accessed December 07, 2019. http://hdl.handle.net/10919/64262.

MLA Handbook (7^th Edition):

Gupta, Nikhil. “Development of a Novel Fine Coal Cleaning and Dewatering Technology.” 2014. Web. 07 Dec 2019.

Vancouver:

Gupta N. Development of a Novel Fine Coal Cleaning and Dewatering Technology. [Internet] [Doctoral dissertation]. Virginia Tech; 2014. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/10919/64262.

Council of Science Editors:

Gupta N. Development of a Novel Fine Coal Cleaning and Dewatering Technology. [Doctoral Dissertation]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/64262

University of Toronto

19. Ya, Jaehoon. Electro-dewatering Treatment of Pulp and Paper Mill Biosludge: The Effects of Conditioners.

Degree: 2017, University of Toronto

URL: http://hdl.handle.net/1807/79498

►

Biosludge has been a problem for pulp and paper mills due to its difficulty to dewater. Electro-dewatering can significantly reduce the water content of biosludge,… (more)

Subjects/Keywords: Biosludge; Conditioners; Electro-dewatering; Electro-osmosis; Pulp and paper mill; Sludge Dewatering; 0542

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ya, J. (2017). Electro-dewatering Treatment of Pulp and Paper Mill Biosludge: The Effects of Conditioners. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/79498

Chicago Manual of Style (16^th Edition):

Ya, Jaehoon. “Electro-dewatering Treatment of Pulp and Paper Mill Biosludge: The Effects of Conditioners.” 2017. Masters Thesis, University of Toronto. Accessed December 07, 2019. http://hdl.handle.net/1807/79498.

MLA Handbook (7^th Edition):

Ya, Jaehoon. “Electro-dewatering Treatment of Pulp and Paper Mill Biosludge: The Effects of Conditioners.” 2017. Web. 07 Dec 2019.

Vancouver:

Ya J. Electro-dewatering Treatment of Pulp and Paper Mill Biosludge: The Effects of Conditioners. [Internet] [Masters thesis]. University of Toronto; 2017. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/1807/79498.

Council of Science Editors:

Ya J. Electro-dewatering Treatment of Pulp and Paper Mill Biosludge: The Effects of Conditioners. [Masters Thesis]. University of Toronto; 2017. Available from: http://hdl.handle.net/1807/79498

Karlstad University

20. Lingman, Oskar. Energi- och miljöeffekter av mekanisk avvattning som försteg till torkning av träflis vid pelletsproduktion.

Degree: Science and Technology (starting 2013), 2018, Karlstad University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68785

►

Med rådande klimathot i form av ökande koldioxidhalter i vår jords atmosfär krävs stora gemensamma insatser för att minska utsläppen. Genom att välja bort… (more)

▼

Med rådande klimathot i form av ökande koldioxidhalter i vår jords atmosfär krävs stora gemensamma insatser för att minska utsläppen. Genom att välja bort fossila bränslen och istället använda miljövänliga energikällor skapar vi tillsammans en hållbar framtid. Träpellets är ett biobränsle tillverkat på biomassa i form av träflis och dess förbränning kan i princip ses som koldioxidneutral. Tillverkningen av bränslepellets är emellertid en energikrävande process där termisk torkning av råvaran står för en majoritet av energianvändningen under pelletstillverkningen, där träflisen torkas från 55–10% fukthalt genom kondensering. I och med den ökande efterfrågan av pellets kommer även större möjligheter till effektivisering, där torksteget i produktionen har stort fokus. Syftet med denna studie har varit att undersöka energi- och miljöeffekter av en ny tvåstegsteknik bestående av mekanisk avvattning som försteg till termisk torkning av träflis i en pelletsproduktion. Den mekanisk avvattningsteknik som undersökts är Drinor CDP - Continuous Dewatering Press. Det primära målet med arbetet har varit att undersöka Drinors CDP som försteg till en bandtork och pneumatisk tork för att slutligen svara på vilken av kombinationerna som ger lägst energianvändning och miljöpåverkan i form av utsläpp. Som referens kommer torkprocessen hos Stora Enso Timber Gruvön användas, där en bandtork i dag används som torksteg. Som delmål kommer två olika partikelstorlekar undersökas vid pneumatisk torkning bestående av spån och flis, detta för att utreda partikelstorlekars påverkan på pneumatisk torkning och om det ens är möjligt att pneumatiskt transportera större flis. Resultaten visar att mekanisk avvattning är en bra lösning för pelletsindustrin. Fallet med CDP i kombination med bandtork ledde till en energireducering med ca 50% och 35% minskade utsläpp som en följd, jämfört med referensfallet bestående av endast bandtork. Resultaten visade även att stora träflispartiklar kunde transporteras pneumatiskt vid en lufthastighet på drygt 23 m/s. Pneumatisk torkning bidrog till en hög användning av el på grund av höga temperaturer, vilket i sin tur leder till stora mängder koldioxidutsläpp.

With the occurring climate threats in the form of increasing levels of carbon dioxide in our Earth's atmosphere, major joint efforts are needed to reduce our emissions. By opting out of fossil fuels and instead using environmentally friendly energy sources, we help create a sustainable future. Wood pellets are a biofuel made from biomass in the form of woodchips and its combustion can in principle be seen as neutral. However, the production of wood pellets is an energy-consuming process where thermal drying of the wet wood chips accounts for a majority of the total energy use during pellet production, where wood chips are typically dried from 55 – 10% moisture by condensation. With an increasing demand for pellets, there will also be more opportunities for efficiency, where the drying stage in production has a large focus. The purpose of this study…

Subjects/Keywords: Pellets; mechanical dewatering; dewatering; energy; wood chips; environment; Pellets; mekanisk avvattning; avvattning; energi; träflis; miljö; Energy Engineering; Energiteknik

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APA (6^th Edition):

Lingman, O. (2018). Energi- och miljöeffekter av mekanisk avvattning som försteg till torkning av träflis vid pelletsproduktion. (Thesis). Karlstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68785

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lingman, Oskar. “Energi- och miljöeffekter av mekanisk avvattning som försteg till torkning av träflis vid pelletsproduktion.” 2018. Thesis, Karlstad University. Accessed December 07, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68785.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lingman, Oskar. “Energi- och miljöeffekter av mekanisk avvattning som försteg till torkning av träflis vid pelletsproduktion.” 2018. Web. 07 Dec 2019.

Vancouver:

Lingman O. Energi- och miljöeffekter av mekanisk avvattning som försteg till torkning av träflis vid pelletsproduktion. [Internet] [Thesis]. Karlstad University; 2018. [cited 2019 Dec 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68785.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lingman O. Energi- och miljöeffekter av mekanisk avvattning som försteg till torkning av träflis vid pelletsproduktion. [Thesis]. Karlstad University; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68785

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Florida

21. Diaz, Matthew. Resistivity of Phosphatic Clay Slurries During Electrokinetic Dewatering.

Degree: 2014, University of Florida

URL: http://ufdc.ufl.edu/AA00057377

► Phosphatic clay slurries are generated while processing phosphate matrices for fertilizer production and are associated with several environmental issues. Recent research has shown that the… (more)

Subjects/Keywords: Anodes; Corrosion; Dewatering; Electric fields; Electrical resistivity; Electrodes; Electrokinetics; pH; Phosphates; Phosphatic clay; Clay; Clay wastes – Dewatering; Electrokinetics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Diaz, M. (2014). Resistivity of Phosphatic Clay Slurries During Electrokinetic Dewatering. (Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/AA00057377

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Diaz, Matthew. “Resistivity of Phosphatic Clay Slurries During Electrokinetic Dewatering.” 2014. Thesis, University of Florida. Accessed December 07, 2019. http://ufdc.ufl.edu/AA00057377.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Diaz, Matthew. “Resistivity of Phosphatic Clay Slurries During Electrokinetic Dewatering.” 2014. Web. 07 Dec 2019.

Vancouver:

Diaz M. Resistivity of Phosphatic Clay Slurries During Electrokinetic Dewatering. [Internet] [Thesis]. University of Florida; 2014. [cited 2019 Dec 07]. Available from: http://ufdc.ufl.edu/AA00057377.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Diaz M. Resistivity of Phosphatic Clay Slurries During Electrokinetic Dewatering. [Thesis]. University of Florida; 2014. Available from: http://ufdc.ufl.edu/AA00057377

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Florida

22. Mckinney, James. Design of Electrolytic Dewatering Systems for Phosphatic Clay Suspensions.

Degree: PhD, Chemical Engineering, 2010, University of Florida

URL: http://ufdc.ufl.edu/UFE0041569

► Phosphatic clays arise as a waste product of the Florida phosphate mining industry. The clays exist initially as a 2-6 solids weight percent slurry which… (more)

▼ Phosphatic clays arise as a waste product of the Florida phosphate mining industry. The clays exist initially as a 2-6 solids weight percent slurry which is pumped to large impoundment areas for natural settling. The clay settling process takes as long as 25 years to reach a value of 40wt% solids. The clay settling areas currently cover an area of over 100 square miles in Central Florida, representing 40 percent of the land that has been mined. The Florida Institute of Phosphate Research (FIPR) has supported bench- and pilot-scale studies to determine the technical and economic feasibility of a variety of processes to speed the dewatering of clays associated with phosphate mining. The approaches considered included using a freeze-thaw cycle to remove water, adding sand layers to enhance drainage, and adding flocculants to enhance settling. While flocculants are used commercially, the other techniques have not been permanently implemented on a large scale, and settling to an acceptable solids content still requires as much as 25 years. Application of an electric field provides an alternative approach for accelerating the removal of water from clay. In this concept, direct electrical current is applied to induce movement of either clay particles or water. In dilute suspensions, the electric field induces the movement of clay particles suspended in water which is known as electrophoresis. Upon formation of a solid matrix, the electric field further induces the movement of water in a process known as electro-osmosis. The objective of this work was to use small-scale electrokinetic experiments to develop parameters that can be used for large-scale design. A bench-top Plexiglas cell was built to perform the experiments. Clay slurry samples were obtained from a phosphate mine located in Central Florida. A set of experimental results were used to calculate scaling parameters to aid in predicting the solids content as a function of operating time and the electric field applied. This was done by scaling the change in solids content by the applied electric field. A linear relationship was found at short times while at longer times a maximum solids weight percent was reached as a function of the electric field. A constitutive relationship was established which relates the increase in solids content to time and the applied electric field. A mathematical model previously developed at the University of Florida was used to model and evaluate varying electrode configurations in a one-square-mile clay settling area. The electrical current generated from the applied voltage was calculated to project electrical power and energy requirements for such a process. For a given electrode configuration, the associated electric field can also be calculated. The experimental work suggests a relationship between the solids content of the clays with the electric field. The model results can then be used to identify regions where the electric field is nonuniform, which indicates regions where the clays would have a nonuniform solids weight percent.… Advisors/Committee Members: Orazem, Mark E. (committee chair), Ziegler, Kirk (committee member), Svoronos, Spyros (committee member), Balachandar, Sivaramakrishnan (committee member).

Subjects/Keywords: Anodes; Dewatering; Electric fields; Electrodes; Electrokinetics; Energy requirements; Phosphates; Phosphatic clay; Pipelines; Slurries; clay, consolidation, dewatering, electrokinetics, phosphate, waste

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mckinney, J. (2010). Design of Electrolytic Dewatering Systems for Phosphatic Clay Suspensions. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0041569

Chicago Manual of Style (16^th Edition):

Mckinney, James. “Design of Electrolytic Dewatering Systems for Phosphatic Clay Suspensions.” 2010. Doctoral Dissertation, University of Florida. Accessed December 07, 2019. http://ufdc.ufl.edu/UFE0041569.

MLA Handbook (7^th Edition):

Mckinney, James. “Design of Electrolytic Dewatering Systems for Phosphatic Clay Suspensions.” 2010. Web. 07 Dec 2019.

Vancouver:

Mckinney J. Design of Electrolytic Dewatering Systems for Phosphatic Clay Suspensions. [Internet] [Doctoral dissertation]. University of Florida; 2010. [cited 2019 Dec 07]. Available from: http://ufdc.ufl.edu/UFE0041569.

Council of Science Editors:

Mckinney J. Design of Electrolytic Dewatering Systems for Phosphatic Clay Suspensions. [Doctoral Dissertation]. University of Florida; 2010. Available from: http://ufdc.ufl.edu/UFE0041569

23. Wang, Xinshu. Improving the Papermaking Properties of Kraft Pulp by Controlling Hornification and Internal Fibrillation.

Degree: 2006, Helsinki University of Technology

URL: http://lib.tkk.fi/Diss/2006/isbn9512282313/

►

The objective of this thesis was to improve press dewatering and paper properties of kraft pulps by controlling hornification and internal fibrillation. Hornification was induced… (more)

▼

The objective of this thesis was to improve press dewatering and paper properties of kraft pulps by controlling hornification and internal fibrillation. Hornification was induced by drying and by pressing pulps, and internal fibrillation was developed in refining. Hornification and internal fibrillation are related to the change in fibre pore structure. In this thesis, a thermoporosimetry technique with cyclohexane as an absorbate was tested and found suitable for detecting the change in pore size and pore volume during drying and refining. The results show that for never-dried fibres, refining mainly expands the large pores in the cell wall, whereas it has only a slight effect on the small pores. Drying closes most of the large pores and a substantial amount of the small pores. For dried fibres, refining not only expands the large pores but also reopens the small pores to a certain extent. Even though the pore volume of previously dried pulps can be recovered by refining (i.e., the pulp can be reswollen), some small pores, which are closed in drying, are not reopened by normal levels of refining. In other words, refining does not completely reverse hornification. Drying of pulps greatly reduces pulp swelling, enhancing dewatering but impairing tensile strength. Dried pulps offer a far better combination of dewatering and tensile strength than never-dried pulps. One possible reason is that some small hard-to-dewater pores in the fibre wall are irreversibly closed by drying, which enables better dewatering. However, pulp drying is energy-consuming. Pressing pulps may provide an economical way to improve dewatering, while maintaining paper strength properties. Pressing hornifies pulps, which promotes dewatering but impairs tensile strength to a certain extent. On the other hand, pressing causes fibres to flatten, with the flattened fibres providing more surface contact for bonding, thus increasing density and tensile strength. Never-dried pulps which were pressed before refining were found to give both improved dewatering and better tensile strength. The refining results support the earlier view that internal fibrillation is largely produced by a cyclic compressive action. It is suggested that fibres need to be turned over in refining and compressed from different directions in order to disrupt their internal structure and cause internal fibrillation. Compression also facilitates fibre straightening, but does not promote external fibrillation and fines generation. At the same swelling level, more straightened pulps give higher tensile strength, and pulps with less fines and external fibrillation enable better dewatering. Hence, to achieve an optimum combination of dewatering and tensile strength, chemical pulp refining should aim at increasing internal fibrillation, straightening fibres, and keeping the amount of fines and external fibrils at a low level.

Reports / Helsinki University of Technology, Laboratory of Paper and Printing Technology. Series A, ISSN 1796-7414; 26

Advisors/Committee Members: Helsinki University of Technology, Department of Forest Products Technology, Laboratory of Paper and Printing Technology.

Subjects/Keywords: swelling; thermoporosimetry; refining; pressing; drying; dewatering; tensile strength

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wang, X. (2006). Improving the Papermaking Properties of Kraft Pulp by Controlling Hornification and Internal Fibrillation. (Thesis). Helsinki University of Technology. Retrieved from http://lib.tkk.fi/Diss/2006/isbn9512282313/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Xinshu. “Improving the Papermaking Properties of Kraft Pulp by Controlling Hornification and Internal Fibrillation.” 2006. Thesis, Helsinki University of Technology. Accessed December 07, 2019. http://lib.tkk.fi/Diss/2006/isbn9512282313/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Xinshu. “Improving the Papermaking Properties of Kraft Pulp by Controlling Hornification and Internal Fibrillation.” 2006. Web. 07 Dec 2019.

Vancouver:

Wang X. Improving the Papermaking Properties of Kraft Pulp by Controlling Hornification and Internal Fibrillation. [Internet] [Thesis]. Helsinki University of Technology; 2006. [cited 2019 Dec 07]. Available from: http://lib.tkk.fi/Diss/2006/isbn9512282313/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang X. Improving the Papermaking Properties of Kraft Pulp by Controlling Hornification and Internal Fibrillation. [Thesis]. Helsinki University of Technology; 2006. Available from: http://lib.tkk.fi/Diss/2006/isbn9512282313/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta

24. Zhang, Ying. Laboratory Study of Freeze-Thaw Dewatering of Albian Mature Fine Tailings (MFT).

Degree: MS, Department of Civil and Environmental Engineering, 2012, University of Alberta

URL: https://era.library.ualberta.ca/files/z603qz86s

► Tailing ponds in Northern Alberta has covered an area of 170 km2. Directive 074 issued in 2009 set stringent criteria for tailings reclamation. Freeze-thaw dewatering… (more)

Subjects/Keywords: tailings; MFT; dewatering; freezing; freeze-thaw; finite strain consolidation

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APA (6^th Edition):

Zhang, Y. (2012). Laboratory Study of Freeze-Thaw Dewatering of Albian Mature Fine Tailings (MFT). (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/z603qz86s

Chicago Manual of Style (16^th Edition):

Zhang, Ying. “Laboratory Study of Freeze-Thaw Dewatering of Albian Mature Fine Tailings (MFT).” 2012. Masters Thesis, University of Alberta. Accessed December 07, 2019. https://era.library.ualberta.ca/files/z603qz86s.

MLA Handbook (7^th Edition):

Zhang, Ying. “Laboratory Study of Freeze-Thaw Dewatering of Albian Mature Fine Tailings (MFT).” 2012. Web. 07 Dec 2019.

Vancouver:

Zhang Y. Laboratory Study of Freeze-Thaw Dewatering of Albian Mature Fine Tailings (MFT). [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2019 Dec 07]. Available from: https://era.library.ualberta.ca/files/z603qz86s.

Council of Science Editors:

Zhang Y. Laboratory Study of Freeze-Thaw Dewatering of Albian Mature Fine Tailings (MFT). [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/z603qz86s

Cranfield University

25. Fane, Sarah Elizabeth. Control of E.coli in biosolids.

Degree: PhD, 2016, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/11815

► Achieving microbial compliance levels in biosolids storage is complicated by the unpredictable increase of Escherichia coli (E. coli), which serves as an important indicator for… (more)

▼ Achieving microbial compliance levels in biosolids storage is complicated by the unpredictable increase of Escherichia coli (E. coli), which serves as an important indicator for pathogen presence risk. Meeting required microbial specifications validates sludge treatment processes and ensures that a safe product is applied to agricultural land. Controlled indicator monitoring provides confidence for farmers, retailers and the food industry, safeguarding the sludge-to-land application route. Following mechanical dewatering biosolids products are stored before microbial compliance testing permits agricultural application. During storage, concentrations of E. coli bacteria can become elevated and prevent the product from meeting the conventional or enhanced levels of treatment outlined in The Safe Sludge Matrix guidelines. Literature research identified innate characteristics of sludge and ambient environmental parameters of storage which are factors likely to influence E. coli behaviour in stored biosolids. The research hypothesis tested whether E. coli growth and death in dewatered sewage sludge can be controlled by the modification of physical-chemical factors in the cake storage environment. Parameters including nutrient availability, temperature, moisture content and atmospheric influences were investigated through a series of laboratory-scale experiments. Controlled dewatering and the assessment of modified storage environments using traditional microbial plating and novel flow cytometry analysis have been performed. At an operational scale, pilot trials and up-scaled monitoring of the sludge storage environment have been conducted enabling verification of laboratory results. Understanding the dynamics of cell health within the sludge matrix in relation to nutrient availability has provided a valuable understanding of the mechanisms that may be affecting bacterial growth post-dewatering. The importance of elevated storage temperatures on E. coli death rates and results showing the benefits of a controlled atmosphere storage environment provide important considerations for utilities.

Subjects/Keywords: Biosolids; Compliance; Safe sludge matrix; Storage; Mechanical dewatering; Temperature; Cell disruption

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fane, S. E. (2016). Control of E.coli in biosolids. (Doctoral Dissertation). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/11815

Chicago Manual of Style (16^th Edition):

Fane, Sarah Elizabeth. “Control of E.coli in biosolids.” 2016. Doctoral Dissertation, Cranfield University. Accessed December 07, 2019. http://dspace.lib.cranfield.ac.uk/handle/1826/11815.

MLA Handbook (7^th Edition):

Fane, Sarah Elizabeth. “Control of E.coli in biosolids.” 2016. Web. 07 Dec 2019.

Vancouver:

Fane SE. Control of E.coli in biosolids. [Internet] [Doctoral dissertation]. Cranfield University; 2016. [cited 2019 Dec 07]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/11815.

Council of Science Editors:

Fane SE. Control of E.coli in biosolids. [Doctoral Dissertation]. Cranfield University; 2016. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/11815

Technical University of Lisbon

26. Castro, Teresa Amélia Garcia de. Proposta de valorização agronómica das lamas da fito-etar de Barroca D'Alva.

Degree: 2011, Technical University of Lisbon

URL: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4029

►

Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia

Sludge management has become a key issue in urban wastewater treatment. Constructed wetland with common… (more)

Subjects/Keywords: constructed wetlands; sewage sludge; Phragmites australis; sludge mineralization; sludge dewatering

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APA (6^th Edition):

Castro, T. A. G. d. (2011). Proposta de valorização agronómica das lamas da fito-etar de Barroca D'Alva. (Thesis). Technical University of Lisbon. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4029

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Castro, Teresa Amélia Garcia de. “Proposta de valorização agronómica das lamas da fito-etar de Barroca D'Alva.” 2011. Thesis, Technical University of Lisbon. Accessed December 07, 2019. http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4029.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Castro, Teresa Amélia Garcia de. “Proposta de valorização agronómica das lamas da fito-etar de Barroca D'Alva.” 2011. Web. 07 Dec 2019.

Vancouver:

Castro TAGd. Proposta de valorização agronómica das lamas da fito-etar de Barroca D'Alva. [Internet] [Thesis]. Technical University of Lisbon; 2011. [cited 2019 Dec 07]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4029.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Castro TAGd. Proposta de valorização agronómica das lamas da fito-etar de Barroca D'Alva. [Thesis]. Technical University of Lisbon; 2011. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4029

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cape Peninsula University of Technology

27. Kholisa, Buyisile. The effect of rheological properties on sludge dewatering in belt filter press .

Degree: 2016, Cape Peninsula University of Technology

URL: http://etd.cput.ac.za/handle/20.500.11838/2464

► Polymers used as flocculants in the secondary sludge dewatering process are one of the most expensive inputs in these plants. The disadvantage is that these… (more)

Subjects/Keywords: Rheology; Sewage – Purification – Activated sludge process; Sewage sludge – Dewatering; Filter-presses

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APA (6^th Edition):

Kholisa, B. (2016). The effect of rheological properties on sludge dewatering in belt filter press . (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/2464

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kholisa, Buyisile. “The effect of rheological properties on sludge dewatering in belt filter press .” 2016. Thesis, Cape Peninsula University of Technology. Accessed December 07, 2019. http://etd.cput.ac.za/handle/20.500.11838/2464.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kholisa, Buyisile. “The effect of rheological properties on sludge dewatering in belt filter press .” 2016. Web. 07 Dec 2019.

Vancouver:

Kholisa B. The effect of rheological properties on sludge dewatering in belt filter press . [Internet] [Thesis]. Cape Peninsula University of Technology; 2016. [cited 2019 Dec 07]. Available from: http://etd.cput.ac.za/handle/20.500.11838/2464.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kholisa B. The effect of rheological properties on sludge dewatering in belt filter press . [Thesis]. Cape Peninsula University of Technology; 2016. Available from: http://etd.cput.ac.za/handle/20.500.11838/2464

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Case Western Reserve University

28. Jeffrey, Bargiel. Commercialization of Lateral Displacement Array for the Dewatering of Microalgae.

Degree: MSs, Physics, 2009, Case Western Reserve University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=case1238702010

► It is shown that a lateral displacement array is technically and commercially feasible for the dewatering of microalgae for the production of algal oil for… (more)

Subjects/Keywords: Energy; Engineering; Fluid Dynamics; Physics; algae; dewatering; biofuels

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APA (6^th Edition):

Jeffrey, B. (2009). Commercialization of Lateral Displacement Array for the Dewatering of Microalgae. (Masters Thesis). Case Western Reserve University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=case1238702010

Chicago Manual of Style (16^th Edition):

Jeffrey, Bargiel. “Commercialization of Lateral Displacement Array for the Dewatering of Microalgae.” 2009. Masters Thesis, Case Western Reserve University. Accessed December 07, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1238702010.

MLA Handbook (7^th Edition):

Jeffrey, Bargiel. “Commercialization of Lateral Displacement Array for the Dewatering of Microalgae.” 2009. Web. 07 Dec 2019.

Vancouver:

Jeffrey B. Commercialization of Lateral Displacement Array for the Dewatering of Microalgae. [Internet] [Masters thesis]. Case Western Reserve University; 2009. [cited 2019 Dec 07]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=case1238702010.

Council of Science Editors:

Jeffrey B. Commercialization of Lateral Displacement Array for the Dewatering of Microalgae. [Masters Thesis]. Case Western Reserve University; 2009. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=case1238702010

Penn State University

29. Basu, Anwesha. Electrostatic & Electrokinetic Dewatering Of Mature Fine Tailings.

Degree: MS, Chemical Engineering, 2013, Penn State University

URL: https://etda.libraries.psu.edu/catalog/18853

► Mature Fine tailings (MFTs) are the byproducts from the mineral processing operations of bitumen mining. They are alkaline suspensions containing high fines (particles < 44… (more)

▼ Mature Fine tailings (MFTs) are the byproducts from the mineral processing operations of bitumen mining. They are alkaline suspensions containing high fines (particles < 44 μm) content. Dewatering and consolidation of MFTs are important for both recycle of water to the oil extraction units and reclamation of clay. However, those are difficult to achieve by sedimentation alone due to low hydraulic conductivity of the tailings. In this dissertation, we have looked at how different surface phenomena like colloidal destabilization and electrokinetic transport mechanisms can bring about water separation in MFTs. Suppression of charges on a colloidal particle electrostatically to allow aggregation has always been a popular means of dewatering the tailings. In this study, we used several versions of a commercial coagulant with non-ionic and anionic polymeric flocculants to treat three different extraction tailings obtained from the respective resources. The polymers were tested for their ability to flocculate the tailings by zeta potential and floc size measurements. Diffusiophoresis is a well-understood flow mechanism that can produce micro-flows even in the inaccessible micro and nano-channels present in a porous medium, for e.g. the concentrated tailings deposits. In our system of MFTs, we observed that flows induced by ionic gradients due to dissolution of inorganic salts like calcium carbonate aid dewatering by a phenomenon called diffusioosmosis. The role of such flows in enhanced dewatering of MFTs is explored in this study in great detail. Thus, the above methods, though governed by different scientific mechanisms, are primarily dependent on the surface charge of the tailings. Although, the results presented here may not give a direct comparison between the dewatering efficiencies for each of these studied methods, but can definitely help us appreciate the fact that both of them can simultaneously be utilized towards achieving better water separation from the tailings and therefore improved consolidation of clay sediments.

Subjects/Keywords: mature fine tailings; dewatering; destabilization; diffusioosmosis; layering and consolidation.

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APA (6^th Edition):

Basu, A. (2013). Electrostatic & Electrokinetic Dewatering Of Mature Fine Tailings. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/18853

Chicago Manual of Style (16^th Edition):

Basu, Anwesha. “Electrostatic & Electrokinetic Dewatering Of Mature Fine Tailings.” 2013. Masters Thesis, Penn State University. Accessed December 07, 2019. https://etda.libraries.psu.edu/catalog/18853.

MLA Handbook (7^th Edition):

Basu, Anwesha. “Electrostatic & Electrokinetic Dewatering Of Mature Fine Tailings.” 2013. Web. 07 Dec 2019.

Vancouver:

Basu A. Electrostatic & Electrokinetic Dewatering Of Mature Fine Tailings. [Internet] [Masters thesis]. Penn State University; 2013. [cited 2019 Dec 07]. Available from: https://etda.libraries.psu.edu/catalog/18853.

Council of Science Editors:

Basu A. Electrostatic & Electrokinetic Dewatering Of Mature Fine Tailings. [Masters Thesis]. Penn State University; 2013. Available from: https://etda.libraries.psu.edu/catalog/18853

Penn State University

30. Verma, Shubham. An Evaluation of a Pilot-Scale Plate-and-Frame Filter Press for Dewatering Fine Coal Refuse and Silica-Sand.

Degree: MS, Petroleum and Mineral Engineering, 2009, Penn State University

URL: https://etda.libraries.psu.edu/catalog/9505

► Laboratory testing was conducted to evaluate the performance of a pilot-scale plate-and-frame filter press for dewatering coal refuse slurries and silica-sand slurries. The fully automated… (more)

▼ Laboratory testing was conducted to evaluate the performance of a pilot-scale plate-and-frame filter press for dewatering coal refuse slurries and silica-sand slurries. The fully automated filter press was manufactured by TH Minerals, Spain and is equipped with a hydraulic system, which operates the plate and diaphragm pumps. The filter press is capable of achieving an operating pressure of up to 150 psi. The unit contains a single set of plates having a filtration area 0.45 m x 0.45 m. Each plate is covered by a poly-propylene cloth with a pore size 0.051 mm. The first slurry sample was obtained from an anthracite cleaning plant located in Pennsylvania. This sample was collected from the plant’s refuse thickener underflow stream, which was feeding a belt-filter press at approximately 24% solids by weight. The sample was a nominal -0.2 mm and had an ash value of 50%. It contained approximately 50% of -0.025 mm material with an ash value of 68%. The second sample was collected from the thickener underflow stream of a bituminous coal cleaning facility located in Pennsylvania. This sample, which was approximately 35% solids by weight, was nominal -0.8 mm and had an ash value of 42%. It contained approximately 25% of -0.025 mm material with an ash value of 64%. The third sample was collected from the thickener underflow stream of another bituminous coal cleaning facility located in Pennsylvania. This sample, which was approximately 22% solids by weight, was nominal -0.14 mm and had an ash value of 15.0%. It contained approximately 65.3% of -0.025 mm material with an ash value of 20.9%. The fourth sample was collected from the thickener underflow stream of a silica-sand processing plant located in Pennsylvania. This sample, which was approximately 10% solids by weight, was nominal -0.14 mm. It contained approximately 37% of -0.025 mm material. A statistical design was developed for each sample using Minitab 15. The tests were carried out to evaluate the effects of feed solids concentration, filter time, probe level, air-drying time, and air-blow pressure on filtrate flow, filtrate solids content, final cake moisture, and filter press unit capacity. Overall it was found that the filter time and drying time had the most significant effects on product moisture and the unit capacity. For Plant 1, product moistures ranged from 22% to 28% with filtrate solids content of approximately 0.2% solids by weight. The unit capacities ranged from 0.8 kg/hr/m2 to 3.6 kg/hr/m2 corresponding to filter cake moistures of 17.2% to 26% respectively. For Plant 2, product moistures ranged from 23.5% to 25.5% with filtrate solids content of approximately 1% solids by weight. The unit capacities ranged from 0.81 kg/hr/m2 to 1.1 kg/hr/m2 corresponding to filter cake moistures of 23.8% versus 25.6% respectively. For Plant 3, product moistures ranged from 16% to 21% with filtrate solids content of approximately 0.07% solids by weight. The unit capacities ranged from 2.2 kg/hr/m2 to 4.2 kg/hr/m2 corresponding to filter cake moistures of 16.9% versus…

Subjects/Keywords: plate and frame filter press; Fine coal dewatering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Verma, S. (2009). An Evaluation of a Pilot-Scale Plate-and-Frame Filter Press for Dewatering Fine Coal Refuse and Silica-Sand. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/9505

Chicago Manual of Style (16^th Edition):

Verma, Shubham. “An Evaluation of a Pilot-Scale Plate-and-Frame Filter Press for Dewatering Fine Coal Refuse and Silica-Sand.” 2009. Masters Thesis, Penn State University. Accessed December 07, 2019. https://etda.libraries.psu.edu/catalog/9505.

MLA Handbook (7^th Edition):

Verma, Shubham. “An Evaluation of a Pilot-Scale Plate-and-Frame Filter Press for Dewatering Fine Coal Refuse and Silica-Sand.” 2009. Web. 07 Dec 2019.

Vancouver:

Verma S. An Evaluation of a Pilot-Scale Plate-and-Frame Filter Press for Dewatering Fine Coal Refuse and Silica-Sand. [Internet] [Masters thesis]. Penn State University; 2009. [cited 2019 Dec 07]. Available from: https://etda.libraries.psu.edu/catalog/9505.

Council of Science Editors:

Verma S. An Evaluation of a Pilot-Scale Plate-and-Frame Filter Press for Dewatering Fine Coal Refuse and Silica-Sand. [Masters Thesis]. Penn State University; 2009. Available from: https://etda.libraries.psu.edu/catalog/9505

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