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Permanent link (DOI): https://doi.org/10.7939/R3VD14

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Ozonation and biodegradation of oil sands process water Open Access

Descriptions

Other title
Subject/Keyword
ozonation
naphthenic acid
toxicity
biodegradation
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wang, Nan
Supervisor and department
Gamal El Din, Mohamed (Civil and Environmental Engineering )
Examining committee member and department
Belosevic, Mike (Biological Science)
Ulrich, Ania (Civil and Environmental Engineering)
Department
Department of Civil and Environmental Engineering
Specialization

Date accepted
2011-04-15T21:26:26Z
Graduation date
2011-06
Degree
Master of Science
Degree level
Master's
Abstract
To ensure oil sands process water (OSPW) is suitable for discharge into the environment, advanced water treatment technologies are required. In this study, integrated ozonation-biodegradation was investigated as a potential treatment option for OSPW. The treatment efficiency was evaluated in terms of naphthenic acid (NA) degradation, chemical oxygen demand (COD), carbonaceous Biological oxygen demand (CBOD), and acute toxicity reduction. Degradation of NAs of more than 99% was achieved using a semi-batch ozonation system at a utilized ozone dose of 80 mg/L combined with subsequent biodegradation. The results also show that ozone decreased the amount of COD while increasing the biodegradability of COD. It was noted that the carbon number and number of NA rings influenced the level of NA oxidation. With a utilized ozone dose of approximately 100 mg/L, the ozonated and biodegraded treated OSPW showed no toxic effect towards bacterium Vibrio fischeri. The results of this study indicate that integrated ozonation-biodegradation is a promising treatment technology for OSPW.
Language
English
DOI
doi:10.7939/R3VD14
Rights
License granted by Nan Wang (nwang@ualberta.ca) on 2011-04-15T21:22:19Z (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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