Document Detail

Stimulation of in vitro anaerobic oxidation of methane rate in a continuous high-pressure bioreactor.
MedLine Citation:
PMID:  20060292     Owner:  NLM     Status:  MEDLINE    
Anaerobic oxidation of methane coupled to sulphate reduction (SR-AOM) prevents oceanic methane emissions and is considered as a major environmental process in the deep-sea sediments. To stimulate in vitro SR-AOM activity, we designed a (continuous) high-pressure bioreactor system. Fed-batch mode incubations showed that the elevated methane pressure stimulated SR-AOM activity: when the methane pressure increased from 1 to 4.5 to 8 MPa, the initial SR-AOM activity increased from 3.46 to 8.64 to 9.22 micromol sulphide production/g(dw)/day; the apparent affinity (K(m)) for methane was 37 mM. However, in each fed-batch mode incubation, there was an inhibitory effect observed after 2 days, probably due to the accumulation of sulphide and the increase of pH. When the reactor was operated in a continuous mode, the SR-AOM activity was constantly increasing within 18 days at both 1 and 8 MPa pressures.
Yu Zhang; Jean-Pierre Henriet; Jeroen Bursens; Nico Boon
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-01-13
Journal Detail:
Title:  Bioresource technology     Volume:  101     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-02-03     Completed Date:  2010-04-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  3132-8     Citation Subset:  IM    
Copyright Information:
Copyright 2009 Elsevier Ltd. All rights reserved.
Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, 9000 Gent, Belgium.
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MeSH Terms
Bioreactors / microbiology*
Methane / metabolism*
Sulfides / metabolism
Reg. No./Substance:
0/Sulfides; 74-82-8/Methane

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