Interaction between Homoacetogens and Methanogens in Lake Sediments

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概要

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• The interaction between homoacetogens and methanogens in lake sediments was investigated using hydrogen consumption as an indicator. Sediments samples were obtained from Lake Izunuma, Miyagi prefecture, Japan, a wintering place for migratory birds from Siberia. A batch experiment using H_2/CO_2 as a substrate was conducted to determine the acetate generation and methane production potential of the sediments. Incubation for 4 d at 37℃ gave the following stoichiometric equation : 88H_2+39HCO^-_3+22H^+→+17CH_3COO^-+5CH_4+83H_2O. The activities, ν_m, of hydrogen-utilizing homoacetogens and methanogens respectively ranged from 3.2 to 48 and from 1.8 to 3.2 mgCOD・gVSS^<-1>・h^<-1>. The population of hydrogen-utilizing homoacetogens was determined to be 2.6×10^8MPN・gVSS^<-1> which was approximately two orders of magnitude higher than that of hydrogen-utilizing methanogens. The results suggest that homoacetogens in the sediments functioned not only as hydrogen consumers but also as major degraders of organic matter, forming acetate as major reduction product.

• 社団法人日本生物工学会の論文
• 1998-11-25

著者

• Li Yu-you

  Technical Research Institute Ataka Construction & Engineering Co.ltd.

• LAY JIUNN-JYI

  Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporati

• NOIKE TATSUYA

  Department of Civil Engineering, Tohoku University

• Lay Jiunn-jyi

  Core Research For Evolutional Science And Technology (crest) Japan Science And Technology Corporatio

• Noike Tatsuya

  Department Of Civil Engineering Tohoku University

関連論文

• Interaction between Homoacetogens and Methanogens in Lake Sediments

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