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TitleBiodegradation of oil sands process affected water in sequencing batch reactors and microbial community analysis by high-throughput pyrosequencing
Publication TypeJournal Article
Year of Publication2014
AuthorsChoi, J., & Liu Y.
Pagination6 pages
Date Published08/2014
PublisherInternational Biodeterioration & Biodegradation
Publication Languageeng
KeywordsBiodegradation, bioremediation, laboratory, microbiology, tailings, tailings water, UofA, wastewater, wastewater treatment

Two sequencing batch reactors (SBR) were constructed and filled with different inocula of activated sludge (AS) and mature fine tailings (MFT) to treat oil sands process-affected water (OSPW). The COD was reduced by 82% in the AS-SBR and 43% in the MFT-SBR during phase I using 10% OSPW and 90% synthetic wastewater as reactor feed. However, COD removal reached 12% and 20% in the AS-SBR and the MFT-SBR, respectively, when 100% raw OSPW was fed into the reactors. Maximum removal of acid-extractable organics (AEO) was 8.7% and 16.6% in the AS-SBR and the MFT-SBR, respectively with a hydraulic retention time of one day. Pyrosequencing analysis revealed that Proteobacteria was the dominant phylum and beta- and gamma-Proteobacteria were dominant classes in both reactors. Evidence of a microbial community change was observed when influent raw OSPW was switched from 50 to 100%. More significant changes in the AS-SBR community were detected.

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