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  4. Impact of iron- and/or sulfate-reduction on a cis-1,2-dichloroethene and vinyl chloride respiring bacterial consortium: experiments and model-based interpretation
 
research article

Impact of iron- and/or sulfate-reduction on a cis-1,2-dichloroethene and vinyl chloride respiring bacterial consortium: experiments and model-based interpretation

Murray, Alexandra
•
Maillard, Julien  
•
Rolle, Massimo
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March 1, 2020
Environmental Science-Processes & Impacts

Process understanding of microbial communities containing organohalide-respiring bacteria (OHRB) is important for effective bioremediation of chlorinated ethenes. The impact of iron and sulfate reduction on cis-1,2-dichloroethene (cDCE) and vinyl chloride (VC) dechlorination by a consortium containing the OHRB Dehalococcoides spp. was investigated using multiphase batch experiments. The OHRB consortium was found to contain endogenous iron- and sulfate-reducing bacteria (FeRB and SRB). A biogeochemical model was developed and used to quantify the mass transfer, aquatic geochemical, and microbial processes that occurred in the multiphase batch system. It was determined that the added SRB had the most significant impact on contaminant degradation. Addition of the SRB increased maximum specific substrate utilization rates, k(max), of cDCE and VC by 129% and 294%, respectively. The added FeRB had a slight stimulating effect on VC dechlorination when exogenous SRB were absent, but when cultured with the added SRB, FeRB moderated the SRB's stimulating effect. This study demonstrates that subsurface microbial community interactions are more complex than categorical, guild-based competition for resources such as electron donor.

  • Details
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Type
research article
DOI
10.1039/c9em00544g
Web of Science ID

WOS:000526894100022

Author(s)
Murray, Alexandra
Maillard, Julien  
Rolle, Massimo
Broholm, Mette
Holliger, Christof  
Date Issued

2020-03-01

Publisher

ROYAL SOC CHEMISTRY

Published in
Environmental Science-Processes & Impacts
Volume

22

Issue

3

Start page

740

End page

750

Subjects

Chemistry, Analytical

•

Environmental Sciences

•

Chemistry

•

Environmental Sciences & Ecology

•

desulfovibrio-vulgaris hildenborough

•

trichloroethylene tce

•

genome sequence

•

kinetic-model

•

ferric iron

•

dechlorination

•

competition

•

fe(iii)

•

hydrogen

•

culture

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LBE  
Available on Infoscience
May 3, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/168553
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