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Permanent link (DOI): https://doi.org/10.7939/R3BK63

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Methanogenesis in oil sands tailings: an analysis of the microbial community involved and its effects on tailings densification Open Access

Descriptions

Other title
Subject/Keyword
diluent
microbial community
oil sands tailings
methanogenesis
tailings densification
citrate
polyacrylamide
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Li, Carmen
Supervisor and department
Foght, Julia (Biolgoical Sciences)
Examining committee member and department
Fedorak, Phil (Biological Sciences)
Guan, Leluo (Agriculture, Food and Nutritional Science)
Department
Department of Biological Sciences
Specialization

Date accepted
2010-01-27T22:13:08Z
Graduation date
2010-06
Degree
Master of Science
Degree level
Master's
Abstract
Densification of tailings slurries to mature fine tailings (MFT) is important in the oil sands industry for tailings inventory reduction, pore water recovery and tailings reclamation. The cause of methane release from the tailings pond of Shell Albian Sands (Albian) and the effects this process has on densification of Albian tailings was investigated. Citrate, added to tailings with polyacrylamide and hydrocarbon-diluent, was identified as the methanogenic substrate. Bacterial and Archaeal 16S rRNA gene sequences in Albian MFT were dominated by matches to Rhodoferax, some Clostridia and sulfate-reducing bacteria, and acetoclastic methanogens. Citrate-, diluent-, and polyacrylamide-amendments to Albian MFT did not cause a microbial shift over a 10-month laboratory incubation period. A potential pathway for microbial methane production in Albian MFT is proposed. Methane production and release from citrate-amended Albian MFT correlated to accelerated densification. Though diluent and polyacrylamide did not affect methanogenesis, they potentially affect gas bubble formation and release.
Language
English
DOI
doi:10.7939/R3BK63
Rights
License granted by Carmen Li (cl7@ualberta.ca) on 2010-01-25T16:27:48Z (GMT): 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 the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein 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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File title: Introduction
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Page count: 193
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