Carbon/electron Source Dependence of Polychlorinated Biphenyl Dechlorination Pathways for Anaerobic Granules

Nollet, Hendrik, Van de Putte, Iris, Raskin, Lutgarde and Verstraete, Willy (2005) Carbon/electron Source Dependence of Polychlorinated Biphenyl Dechlorination Pathways for Anaerobic Granules. Chemosphere, 58 3: 299-310. doi:10.1016/j.chemosphere.2004.07.036


Author Nollet, Hendrik
Van de Putte, Iris
Raskin, Lutgarde
Verstraete, Willy
Title Carbon/electron Source Dependence of Polychlorinated Biphenyl Dechlorination Pathways for Anaerobic Granules
Journal name Chemosphere   Check publisher's open access policy
ISSN 0045-6535
Publication date 2005-01
Sub-type Article (original research)
DOI 10.1016/j.chemosphere.2004.07.036
Volume 58
Issue 3
Start page 299
End page 310
Total pages 12
Place of publication Oxford
Publisher Pergamon Press/Elsevier
Language eng
Subject 090703 Environmental Technologies
Formatted abstract
The effect of acclimating anaerobic granules from commercial bioreactors with different carbon/electron sources on their ability to reductively dechlorinate previous termanext term tri-(2,3,4-CB) and heptachlorobiphenyl (2,2′,3,3′,4,5,6-CB) was studied. The anaerobic granules were first grown in upflow anaerobic sludge blanket (UASB) reactors fed with two different mixtures of carbon/electron sources, i.e., propionate/butyrate/methanol and formate/methanol. Differences in dechlorination patterns for 2,2′,3,3′,4,5,6-CB were observed in batch experiments inoculated with granules from these two sets of UASB reactors. Variation of the carbon/electron source, during the dechlorination process, had no effect on the dechlorination pathway, but the extents and rates of dechlorination were highest for ethanol and formate and lowest for pyruvate fed batches. Pre-acclimation of different anaerobic sludges to polychlorinated biphenyls (PCBs) shortened the lag period, but did not influence the PCB dechlorination pathway. This is the first time that similar acclimation conditions for several anaerobic microbial communities prior to inoculation were reported to yield similar substrate specificities for the reductive dechlorination of specific PCB congeners. This research demonstrates previous termanext term successful strategy for the development of biocatalysts to serve as the inoculum of partially decontaminated sites in order to provide microorganisms with specificities complementary to those of naturally occurring dechlorinators.
Keyword Polychlorinated biphenyl
Anaerobic granules
Carbon/electron source
Unadapted
Reductive dechlorination pathway
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Advanced Water Management Centre Publications
 
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