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Influence of temperature and pH on methanogenic digestion in two-phase anaerobic co-digestion of pig manure with maize straw
School of Environmental Science and Engineering, Tianjin University.
Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin University.
RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
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2016 (English)In: Journal of Residuals Science and Technology, ISSN 15448053, Vol. 13, 27-32 p.Article in journal (Refereed) Published
Abstract [en]

The objective of this work was to investigate the performance and archaeal community of methanogenic digester under different temperatures (35°C, 55°C) and pH values (6.5, 7.0, 7.5, 8.0 and 8.5) in two-phase anaerobic digestion of pig manure and maize straw. The specific CH4 yields decreased by 22.6%, 60.0% and 94.1% for pH 7.5, 8.0 and 8.5 compared with pH 7.0 (277 N mLg-1CODadd) at 35°C, and decreased by 31.6%, 70.9% and 95.0% compared with pH 7.0 (253 N mLg-1CODadd) at 55°C The methane productions of mesophilic digestion at five pH levels were 13.6%, 9.7%, 24.1%, 50.8% and 30.0% higher than that of thermophilic digestion. Terminal restriction fragment length polymorphism (T-RFLP) analyses combined with clone library indicated that Methanosaeta and Methanosarcina were the dominant genus at 35°C and 55°C, respectively, and the relative abundance decreased significantly with the pH increasing from 7.5 to 8.5. © 2016 DEStech Publications, Inc.

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2016. Vol. 13, 27-32 p.
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Natural Sciences
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URN: urn:nbn:se:ri:diva-316DOI: 10.12783/issn.1544-8053/13/2/S5OAI: oai:DiVA.org:ri-316DiVA: diva2:938583
Available from: 2016-06-17 Created: 2016-06-17 Last updated: 2016-06-29Bibliographically approved

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