Document Detail


Evolution of butyric acid and the methanogenic microbial population in a thermophilic dry anaerobic reactor.
MedLine Citation:
PMID:  20471818     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Knowledge of the relationship between the evolution of butyric acid, the main precursor of methane, and the methanogenic microbial population, quantified by fluorescent in situ hybridization (FISH), is important for understating and controlling the anaerobic digestion of solid waste. In this study, a statistical analysis has been made of this relationship in a laboratory-scale continuously stirred tank reactor (CSTR) without recycling of biomass. The CSTR has been operated at four organic loading rates (OLR) between 4.42 and 7.50 kg VS m(-3)day(-1), using the Organic Fraction of Municipal Solid Waste (OFMSW) as the substrate. During the start-up stage, the consumption of butyric acid is related to the population of H(2)-utilising methanogens (R(2)=0.774), whereas in the stabilization stage, it is related to that of acetoclastic methanogens (R(2)=0.716). Therefore, it can be concluded that the methanogenic population dynamics are closely correlated with the concentration of volatile fatty acids, and in particular, with that of butyric acid.
Authors:
B Montero; J L Garcia-Morales; D Sales; R Solera
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-14
Journal Detail:
Title:  Waste management (New York, N.Y.)     Volume:  30     ISSN:  1879-2456     ISO Abbreviation:  Waste Manag     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-09-06     Completed Date:  2011-01-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9884362     Medline TA:  Waste Manag     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1790-7     Citation Subset:  IM    
Copyright Information:
(c) 2010 Elsevier Ltd. All rights reserved.
Affiliation:
Department of Chemical Engineering and Food Technology, Faculty of Marine and Environmental Sciences, University of Cadiz, Campus Rio San Pedro s/n, 11510 Puerto Real, Cadiz, Spain. blanca.montero@uca.es
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MeSH Terms
Descriptor/Qualifier:
Bacteria, Anaerobic / metabolism*
Bioreactors*
Butyric Acid / metabolism*
Chromatography, Gas
Fatty Acids
In Situ Hybridization, Fluorescence
Methanomicrobiales / metabolism*
Population Dynamics
Refuse Disposal / instrumentation*,  methods*
Chemical
Reg. No./Substance:
0/Fatty Acids; 107-92-6/Butyric Acid

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


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