Document Detail


Degradation of aroclor 1242 in a single-stage coupled anaerobic/aerobic bioreactor.
MedLine Citation:
PMID:  11763034     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Degradation of Aroclor 1242 was studied in granular biofilm reactors with limited aeration. An aerobic biphenyl degrader, Rhodococcus sp. M5, was used to supplement a natural bacterial population present in a "bioaugmented" reactor, while the "non-bioaugmented" reactor only contained natural granular sludge. The bioaugmentation, however appeared to have no effect on the reactor performance. Aroclor measurements showed its disappearance in both reactors with only 16-19% of Aroclor recovered from the reactor biomass and effluent. Simultaneously, a chlorine balance indicated that dechlorination occurred at a specific rate of 1.43 mg PCB (g volatile suspended solids)(-1) d(-1), which was comparable to the observed rate of Aroclor disappearance. Intermediates detected in both reactors were biphenyl, benzoic acid, and mono-hydroxybiphenyls. This suggests that a near-complete mineralization of Aroclor can be achieved in a single-stage anaerobic/aerobic system due to a combination of reductive and oxidative degradation mechanisms.
Authors:
B Tartakovsky; A Michott; J C Cadieux; J Hawari; S R Guiot
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water research     Volume:  35     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2001 Dec 
Date Detail:
Created Date:  2001-12-12     Completed Date:  2002-04-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  4323-30     Citation Subset:  IM    
Affiliation:
Biotechnology Research Institute, Montreal, Quebec, Canada.
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MeSH Terms
Descriptor/Qualifier:
Aroclors / metabolism*
Bacteria, Aerobic / physiology
Bacteria, Anaerobic / physiology
Biofilms*
Bioreactors*
Environmental Pollutants / metabolism*
Oxidation-Reduction
Rhodococcus / physiology*
Water Purification
Chemical
Reg. No./Substance:
0/Aroclors; 0/Environmental Pollutants; 53469-21-9/aroclor 1242

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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