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Improved biogas production from whole stillage by co-digestion with cattle manure
RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
2012 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 114, 314-319 p.Article in journal (Refereed)
Abstract [en]

Whole stillage, as sole substrate or co-digested with cattle manure, was evaluated as substrate for biogas production in five mesophilic laboratory-scale biogas reactors, operating semi-continuously for 640days. The process performance was monitored by chemical parameters and by quantitative analysis of the methanogenic and acetogenic population. With whole stillage as sole substrate the process showed clear signs of instability after 120days of operation. However, co-digestion with manure clearly improved biogas productivity and process stability and indicated increased methane yield compared with theoretical values. The methane yield at an organic loading rate (OLR) at 2.8gVS/(L×day) and a hydraulic retention time (HRT) of 45days with a substrate mixture 85% whole stillage and 15% manure (based on volatile solids [VS]) was 0.31N L CH 4/gVS. Surprisingly, the abundance of the methanogenic and acetogenic populations remained relatively stable throughout the whole operation and was not influenced by process performance. © 2012 Elsevier Ltd.

Place, publisher, year, edition, pages
2012. Vol. 114, 314-319 p.
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Agricultural Science, Forestry and Fisheries
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URN: urn:nbn:se:ri:diva-2418DOI: 10.1016/j.biortech.2012.03.005PubMedID: 22464422Scopus ID: 2-s2.0-84860425357OAI: oai:DiVA.org:ri-2418DiVA: diva2:960008
Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2017-11-21Bibliographically approved

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