Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 334009
Title Interspecies electron transfer in methanogenic propionate degrading consortia
Author(s) Bok, F.A.M. de; Plugge, C.M.; Stams, A.J.M.
Source Water Research 38 (2004)6. - ISSN 0043-1354 - p. 1368 - 1375.
DOI https://doi.org/10.1016/j.watres.2003.11.028
Department(s) Microbiology
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2004
Keyword(s) sulfate-reducing bacterium - syntrophobacter-wolinii - oxidizing bacterium - granular sludge - sp-nov - methanospirillum-hungatei - formate dehydrogenases - anaerobic degradation - phylogenetic analysis - smithella-propionica
Abstract Propionate is a key intermediate in the conversion of complex organic matter under methanogenic conditions. Oxidation of this compound requires obligate syntrophic consortia of acetogenic proton- and bicarbonate reducing bacteria and methanogenic archaea. Although H-2 acts as an electron-carrier in these consortia, evidence accumulates that formate plays an even more important role. To make energy yield from propionate oxidation energetically feasible for the bacteria and archaea involved, the concentrations of H-2 and formate have to be extremely low. On the other hand, the diffusion distance of these carriers has to be small to allow high propionate conversion rates. Accordingly, the high conversion rates observed in methanogenic bioreactors are due to the fact that the propionate-oxidizing bacteria and their methanogenic partners form micro-colonies within the densely packed granules. (C) 2003 Elsevier Ltd. All rights reserved.
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