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Anaerobic treatment of municipal wastewater at ambient temperature: Analysis of archaeal community structure and recovery of dissolved methane

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Title: Anaerobic treatment of municipal wastewater at ambient temperature: Analysis of archaeal community structure and recovery of dissolved methane
Authors: Bandara, Wasala M.K.R.T.W. Browse this author
Kindaichi, Tomonori Browse this author
Satoh, Hisashi Browse this author →KAKEN DB
Sasakawa, Manabu Browse this author
Nakahara, Yoshihito Browse this author
Takahashi, Masahiro Browse this author
Okabe, Satoshi Browse this author →KAKEN DB
Keywords: Archaeal community structure
Degassing membrane
Dissolved methane
Municipal wastewater
Psychrophilic condition
Upflow anaerobic sludge blanket process
Issue Date: 1-Nov-2012
Publisher: Elsevier
Journal Title: Water Research
Volume: 46
Issue: 17
Start Page: 5756
End Page: 5764
Publisher DOI: 10.1016/j.watres.2012.07.061
PMID: 22921025
Abstract: Anaerobic treatment is an attractive option for the biological treatment of municipal wastewater. In this study, municipal wastewater was anaerobically treated with a bench-scale upflow anaerobic sludge blanket (UASB) reactor at temperatures from 6-31℃ for 18 months to investigate total chemical oxygen demand (COD) removal efficiency, archaeal community structure, and dissolved methane (D-CH4) recovery efficiency. The COD removal efficiency was more than 50% in summer and below 40% in winter with no evolution of biogas. Analysis of the archaeal community structures of the granular sludge from the UASB using 16S rRNA gene-cloning indicated that after microorganisms had adapted to low temperatures, the archaeal community had a lower diversity and the relative abundance of acetoclastic methanogens decreased together with an increase in hydrogenotrophic methanogens. D-CH4, which was detected in the UASB effluent throughout the operation, could be collected with a degassing membrane. The ratio of the collection to recovery rates was 60% in summer and 100% in winter. For anaerobic treatment of municipal wastewater at lower temperatures, hydrogenotrophic methanogens play an important role in COD removal and D-CH4 can be collected to reduce greenhouse gas emissions and avoid wastage of energy resources.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐藤 久

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