Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of Substrates on the Microbial Communities in a Microbial Electrolysis Cell and Anaerobic Digestion Coupled System

기질에 따른 미생물 전해 전지-혐기성 소화의 미생물 군집 특성

  • LEE, CHAE-YOUNG (Department of Civil Eng. and Institute of River Environmental Technology, The University of Suwon) ;
  • HAN, SUN-KEE (Department of Environmental Health, Korea National Open University)
  • 이채영 (수원대학교 토목공학과.하천환경기술연구소) ;
  • 한선기 (한국방송통신대학교 환경보건학과)
  • Received : 2019.05.29
  • Accepted : 2019.06.30
  • Published : 2019.06.30
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Abstract

This study was conducted to evaluate the microbial communities in coupled system of a microbial electrolysis cell and an anaerobic digestion. Glucose, butyric acid, propionic acid and acetic acid were used as substrates. The maximum methane production and methane production rate of propionic acid respectively were $327.9{\pm}6.7mL\;CH_4/g\;COD$ and $28.3{\pm}3.1mL\;CH_4/g\;COD{\cdot}d$, which were higher than others. Microbial communities' analyses indicated that acetoclastic methangens were predominant in all systems. But the proportion of hydrogenotrophic methanogens was higher in the system using propionic acid as a substrate when compared to others. In coupled system of a microbial electrolysis cell and anaerobic digestion, the methane production was higher as the distribution of hydrogen, which was generated by substrate degradation, and proportion of hydrogenotrophic methanogens was higher.

Keywords

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Fig. 1. Schematic diagram of reactor

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Fig. 2. Methane production with different substrates

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Fig. 3. Methane production rate with different substrates

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Fig. 4. Taxonomic composition of microorganisms in reactors 다. 이러한 결과는 생물전기화학적 기술이 메탄을 생

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