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Co-digestion of bovine slaughterhouse wastes, cow manure, various crops and municipal solid waste at thermophilic conditions: a comparison with specific case running at mesophilic conditions
University of Borås, School of Engineering.
University of Borås, School of Engineering.
2013 (English)In: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 67, no 5, 989-995 p.Article in journal (Refereed) Published
Sustainable development
The content falls within the scope of Sustainable Development
Abstract [en]

A co-digestion process was evaluated when mixing different ratios of agro-industrial residues, i.e. bovine slaughterhouse waste (SB); cow manure (M); various crop residues (VC); and municipal solid waste (MSW) by anaerobic batch digestion under thermophilic conditions (55 °C). A selected study case at mesophilic condition (37 °C) was also investigated. The performance of the co-digestion was evaluated by kinetics (k(0)). The best kinetic results were obtained under thermophilic operation when a mixture of 22% w/w SB, 22% w/w M, 45% w/w VC and 11% w/w MSW was co-digested, which showed a proper combination of high values in r(s)CH(4) and k(0) (0.066 Nm(3)CH(4)/kgVS*d, 0.336 d(-1)) during the anaerobic process. The effect of temperature on methane yield (Y(CH4)), specific methane rate (r(s)CH(4)) and k(0) was also analyzed for a specific study case; there a mixture of 25% w/w of SB, 37.5% w/w of M, 37.5% of VC and 0% of MSW was used. Response variables were severely affected by mesophilic conditions, diminishing to at least 45% of the thermophilic values obtained for a similar mixture. The effect of temperature suggested that thermophilic conditions are suitable to treat these residues.

Place, publisher, year, edition, pages
I W A Publishing , 2013. Vol. 67, no 5, 989-995 p.
Keyword [en]
Resursåtervinning
National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-1553DOI: 10.2166/wst.2013.647ISI: 000316333400008PubMedID: 23416589Local ID: 2320/12239OAI: oai:DiVA.org:hb-1553DiVA: diva2:869611
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2016-11-23Bibliographically approved

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CiteExportLink to record
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