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Permanent link (DOI): https://doi.org/10.7939/R3DQ5Q

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Study of Bio-densification Process in Oil Sands Tailings: Modeling and Experimental Validation Open Access

Descriptions

Other title
Subject/Keyword
Consolidation of tailings
Mature Fine Tailings
Oil sands tailings
Bio-densification
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Roozbahani, Saba
Supervisor and department
Szymanski, Jozef (Civil and Environment Engineering)
Gupta, Rajender (Chemical and Material Engineering)
Examining committee member and department
Prasad, Vinay (Chemical and Material Engineering)
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2012-06-28T10:46:33Z
Graduation date
2012-11
Degree
Master of Science
Degree level
Master's
Abstract
Slow densification of mature fine tailings (MFT) is one of the major challenges in reduction of tailings inventory, pore-water recovery and reclamation of tailings for oil sands industry. Bio-densification is a new treatment method in which densification of tailings is accelerated through microbiological activity. Two-meter columns were installed to study effect of microbial activity on consolidation of MFT. Gas production and changes in concentration of ions due to microbial activity are recognized as two important parameters in settling rate of bio-activated tailings. Therefore, effects of these parameters on consolidation characteristics of tailings are studied. Effect of bicarbonate ions on settling was investigated based on a series of experiments on bitumen-free MFT which was synthesized through separation process. Two models have been developed based on finite strain theory to describe consolidation of saturated and gassy slurries. These equations are solved by COMSOL Multiphysics to predict the experimental observations.
Language
English
DOI
doi:10.7939/R3DQ5Q
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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