About: Competition and coexistence of sulfate-reducing bacteria, acetogens and methanogens in a lab-scale anaerobic bioreactor as affected by changing substrate to sulfate ratio

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About: Competition and coexistence of sulfate-reducing bacteria, acetogens and methanogens in a lab-scale anaerobic bioreactor as affected by changing substrate to sulfate ratio Goto Sponge NotDistinct Permalink

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type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
title	Competition and coexistence of sulfate-reducing bacteria, acetogens and methanogens in a lab-scale anaerobic bioreactor as affected by changing substrate to sulfate ratio
Creator	Muyzer, Gerard Stams, Alfons Dar, Shabir Gijs, J Kleerebezem, Robbert
source	PMC
abstract	The microbial population structure and function of natural anaerobic communities maintained in lab-scale continuously stirred tank reactors at different lactate to sulfate ratios and in the absence of sulfate were analyzed using an integrated approach of molecular techniques and chemical analysis. The population structure, determined by denaturing gradient gel electrophoresis and by the use of oligonucleotide probes, was linked to the functional changes in the reactors. At the influent lactate to sulfate molar ratio of 0.35 mol mol(−1), i.e., electron donor limitation, lactate oxidation was mainly carried out by incompletely oxidizing sulfate-reducing bacteria, which formed 80–85% of the total bacterial population. Desulfomicrobium- and Desulfovibrio-like species were the most abundant sulfate-reducing bacteria. Acetogens and methanogenic Archaea were mostly outcompeted, although less than 2% of an acetogenic population could still be observed at this limiting concentration of lactate. In the near absence of sulfate (i.e., at very high lactate/sulfate ratio), acetogens and methanogenic Archaea were the dominant microbial communities. Acetogenic bacteria represented by Dendrosporobacter quercicolus-like species formed more than 70% of the population, while methanogenic bacteria related to uncultured Archaea comprising about 10–15% of the microbial community. At an influent lactate to sulfate molar ratio of 2 mol mol(−1), i.e., under sulfate-limiting conditions, a different metabolic route was followed by the mixed anaerobic community. Apparently, lactate was fermented to acetate and propionate, while the majority of sulfidogenesis and methanogenesis were dependent on these fermentation products. This was consistent with the presence of significant levels (40–45% of total bacteria) of D. quercicolus-like heteroacetogens and a corresponding increase of propionate-oxidizing Desulfobulbus-like sulfate-reducing bacteria (20% of the total bacteria). Methanogenic Archaea accounted for 10% of the total microbial community.
has issue date	2008-04-01(xsd:dateTime)
bibo:doi	10.1007/s00253-008-1391-8
bibo:pmid	18305937
has license	no-cc
sha1sum (hex)	3d9c8ffbadb8a8ad484a639fe18ddbcdb72848f3
schema:url	https://doi.org/10.1007/s00253-008-1391-8
resource representing a document's title	Competition and coexistence of sulfate-reducing bacteria, acetogens and methanogens in a lab-scale anaerobic bioreactor as affected by changing substrate to sulfate ratio
has PubMed Central identifier	PMC2271084
has PubMed identifier	18305937
schema:publication	Appl Microbiol Biotechnol
resource representing a document's body	covid:3d9c8ffbadb8a8ad484a639fe18ddbcdb72848f3#body_text
is schema:about of	named entity 'chemical analysis' named entity 'total' named entity 'stirred' named entity 'ratio' named entity 'integrated' named entity 'function' named entity 'LIMITATION' named entity 'ANALYZED' named entity 'CONDITIONS' named entity 'ELECTRON DONOR' named entity 'CHEMICAL ANALYSIS' named entity 'lactate' named entity 'microbial community' named entity 'ratio' named entity 'sulfate' named entity 'acetogens' named entity 'sulfate' named entity 'sulfate' named entity 'route' named entity 'lactate' named entity 'ratios' named entity 'oligonucleotide' named entity 'limitation' named entity 'lactate' named entity 'molecular techniques' named entity 'molar ratio' named entity 'lactate' named entity 'methanogenic bacteria' named entity 'lactate' named entity 'oxidizing' named entity 'electron donor' named entity 'acetogens' named entity 'propionate' named entity 'methanogenic Archaea' named entity 'anaerobic' named entity 'anaerobic' named entity 'denaturing gradient gel electrophoresis' named entity 'ENVIRONMENTAL BIOTECHNOLOGY' named entity 'sulfate' named entity 'lactate' named entity 'vitamin' named entity 'hybridized' named entity 'lactate' named entity 'lactate' named entity 'dissolved oxygen' named entity 'PCR' named entity '16S rRNA' named entity 'sulfate' named entity 'primer' named entity 'bacterial cells' named entity '3.5' named entity 'molecular methods' named entity 'sulfate' named entity 'thermodynamic' named entity 'relative abundance' named entity 'propionic acid' named entity 'relative abundance' named entity 'carbon dioxide' named entity 'R2a' named entity 'R2a' named entity 'sulfate' named entity 'partial oxidation' named entity 'lactate' named entity 'DGGE' named entity 'R2a' named entity 'R2a' named entity 'stirred tank' named entity 'methanogenic' named entity 'acetogenesis' named entity 'organism' named entity '16S rRNA' named entity 'lactate' named entity 'acetate' named entity 'microbial communities' named entity 'Archaea' named entity 'methanogenic' named entity 'acetate'

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