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 400555
Title Biological formation of caproate and caprylate from acetate: fuel and chemical production from low grade biomass
Author(s) Steinbusch, K.J.J.; Hamelers, H.V.M.; Plugge, C.M.; Buisman, C.J.N.
Source Energy & Environmental Science 4 (2011)1. - ISSN 1754-5692 - p. 216 - 224.
Department(s) Sub-department of Environmental Technology
Microbiological Laboratory
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) fermentative hydrogen-production - fatty-acids - clostridium-kluyveri - carboxylic-acids - mixed cultures - bacteria - ethanol - 2-bromoethanesulfonate - methanogenesis - ketonization
Abstract This research introduces an alternative mixed culture fermentation technology for anaerobic digestion to recover valuable products from low grade biomass. In this mixed culture fermentation, organic waste streams are converted to caproate and caprylate as precursors for biodiesel or chemicals. It was found that acetate, as the main intermediate of anaerobic digestion, can be elongated to medium chain fatty acids with six and eight carbon atoms. Mixed microbial communities were able to produce 8.17 g l-1 caproate and 0.32 g l-1 caprylate under methanogenesis-suppressed conditions in a stable batch reactor run. The highest production rate was 25.6 mM C caproate per day with a product yield of 0.6 mol C per mol C. This elongation process occurred with both ethanol and hydrogen as electron donors, demonstrating the flexibility of the process. Microbial characterization revealed that the microbial populations were stable and dominated by relatives of Clostridium kluyveri
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