Effects of intermittent and continuous aeration on accelerative stabilization and microbial population dynamics in landfill bioreactors(ENVIRONMENTAL BIOTECHNOLOGY)

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概要

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• Performance and microbial population dynamics in landfill bioreactors were investigated in laboratory experiments. Three reactors were operated without aeration (control reactor, CR), with cyclic 6-h aeration and 6-h non-aeration (intermittently aerated reactor, IAR), and with continuous aeration (continuously aerated reactor, CAR). Each reactor was loaded with high-organic solid waste. The performance of IAR was highest among the reactors up to day 90. The respective solid weight, organic matter content, and waste volume on day 90 in the CR, IAR, and CAR were 50.9, 39.1, and 47.5%; 46.5, 29.3 and 35.0%; and 69, 38, and 53% of the initial values. Organic carbon and nitrogen compounds in leachate in the IAR and the CAR showed significant decreases in comparison to those in the CR. The most probable number (MPN) values of fungal 18S rDNA in the CAR and the IAR were higher than those in the CR. Terminal restriction fragment length polymorphism analysis showed that unique and diverse eubacterial and archaeal communities were formed in the IAR. The intermittent aeration strategy was favorable for initiation of solubilization of organic matter by the aerobic fungal populations and the reduction of the acid formation phase. Then the anaerobic H_2-producing bacteria Clostridium became dominant in the IAR. Sulfate-reducing bacteria, which cannot use acetate/sulfate but which instead use various organics/sulfate as the electron donor/acceptor were also dominant in the IAR. Consequently, Methanosarcinales, which are acetate-utilizing methanogens, became the dominant archaea in the IAR, where high methane production was observed.

• 社団法人日本生物工学会の論文

著者

• Ike Michihiko

  Division of Sustainable Energy and Environmental Engineering, Osaka University

• SODA Satoshi

  Division of Endocrinology and Metabolism, Niigata University Graduate School of Medical and Dental S

• Sang Nguyen

  Division Of Sustainable Energy And Environmental Engineering Graduate School Of Engineering Osaka Un

• Sang Nguyen

  The Division Of Sustainable Energy And Environmental Engineering Graduate School Of Engineering Osak

• Inoue Daisuke

  Division of Sustainable Energy and Environmental Engineering, Osaka University

• Sei Kazunari

  Division of Sustainable Energy and Environmental Engineering, Osaka University

• Ike M

  Division Of Sustainable Energy And Environmental Engineering Osaka University

• Inoue Daisuke

  Division Of Sustainable Energy And Environmental Engineering Graduate School Of Engineering Osaka Un

• Sei Kazunari

  Dept. Mat. Env. Energy. Osaka Univ.

• Ike Michihiko

  Division Of Sustainable Energy And Environmental Engineering Osaka University

• Ike Michihiko

  大阪大学 環境･エネルギー工学専攻

• Ike Michihiko

  Division Of Sustainable Energy And Environmental Engineering Graduate School Of Engineering Osaka Un

• Inoue Daisuke

  Division Of Endocrinology And Metabolism Department Of Internal Medicine Hyogo Prefectural Amagasaki

• Soda S

  National Institute For Environmental Studies

• Soda Satoshi

  Division Of Endocrinology And Metabolism Niigata University Graduate School Of Medical And Dental Sc

• Ike Michihiko

  Environ. Eng. Osaka Univ.

• Ike M

  Osaka University

• Ike Michihiko

  Department Of Environmental Engineering Faculty Of Engineering Osaka University

• Sei K

  Dept. Mat. Env. Energy. Osaka Univ.

• Sei Kazunari

  Division Of Sustainable Energy And Environmental Engineering Graduate School Of Engineering Osaka Un

• Ike M

  Division Of Sustainable Energy And Environmental Engineering Graduate School Of Engineering Osaka Un

• Inoue Daisuke

  Division Of Artificial Environment Systems Yokohama National University

• Inoue Daisuke

  Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University

• SODA SATOSHI

  Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University

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