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COD/sulfate ratio does not affect the methane yield and microbial diversity in anaerobic digesters
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Resource recovery.ORCID iD: 0000-0002-8170-379x
Newcastle Univ, Sch Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England..ORCID iD: 0000-0002-7220-530X
Univ Warwick, Sch Life Sci, Coventry CV4 7AL, W Midlands, England..
Univ Warwick, Sch Life Sci, Coventry CV4 7AL, W Midlands, England..
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2019 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 155, no A Z, 1986, APPLIED AND ENVIRONMENTAL MICROBIOLOGY, V51, P572 rdy KJ, 2003, FEMS MICROBIOLOGY ECOLOGY, V44, P361, p. 444-454Article in journal (Refereed) Published
Abstract [en]

Anaerobic digestion of organic matter is the major route of biomethane production. However, in the presence of sulfate, sulfate-reducing bacteria (SRB) typically outcompete methanogens, which may reduce or even preclude methane production from sulfate-containing wastewaters. Although sulfate reduction and methanogenesis can occur simultaneously, our limited understanding of the microbiology of anaerobic digesters treating sulfate-containing wastewaters constrains improvements in the production of methane from these systems. This study tested the effects of carbon sources and chemical oxygen demand-to-sulfate ratio (COD/SO42-) on the diversity and interactions of SRB and methanogens in an anaerobic digester treating a high-sulfate waste stream. Overall, the data showed that sulfate removal and methane generation occurred in varying efficiencies and the carbon source had limited effect on the methane yield. Importantly, the results demonstrated that methanogenic and SRB diversities were only affected by the carbon source and not by the COD/SO42- ratio. 

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2019. Vol. 155, no A Z, 1986, APPLIED AND ENVIRONMENTAL MICROBIOLOGY, V51, P572 rdy KJ, 2003, FEMS MICROBIOLOGY ECOLOGY, V44, P361, p. 444-454
Keywords [en]
Anaerobic digestion, Methanogens, Sulfate reducers, COD/Sulfate ratio
National Category
Renewable Bioenergy Research
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URN: urn:nbn:se:kth:diva-251469DOI: 10.1016/j.watres.2019.02.038ISI: 000464488500042PubMedID: 30861382Scopus ID: 2-s2.0-85062679302OAI: oai:DiVA.org:kth-251469DiVA, id: diva2:1317370
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QC 20190522

Available from: 2019-05-22 Created: 2019-05-22 Last updated: 2019-05-29Bibliographically approved

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Cetecioglu, Zeynep

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