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Anaerobic treatment of municipal wastewater at ambient temperature: Analysis of archaeal community structure and recovery of dissolved methane
| 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) |
| URI: | http://hdl.handle.net/2115/50385 |
| 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)
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Submitter: 佐藤 久
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