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NTIS 바로가기Microbiology and biotechnology letters = 한국미생물·생명공학회지, v.45 no.3, 2017년, pp.185 - 199
조경숙 (이화여자대학교 환경공학과) , 정혜경 (이화여자대학교 환경공학과)
Methane, which is emitted from natural and anthropogenic sources, is a representative greenhouse gas for global warming. Methanotrophs are widespread in the environment and play an important role in the biological oxidation of methane via methane monooxygenases (MMOs), key enzymes for methane oxidat...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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주요한 인위적 메탄 발생원에는 무엇이 있는가? | 전지구적 메탄 배출량의 1/3은 자연적 발생원(주로 습지) 유래이고, 2/3은 인위적 발생원 유래로 추정되고 있다[1]. 주요한 인위적 메탄 발생원은 장내세균에 의한 발효(enteric fermentation), 가스/오일, 매립지, 벼농사, 석탄 채광, 폐수 처리 등이다[Table 1] [1, 3]. 인위적인 메탄 발생 기작은 크게 3가지로 분류할 수 있다. | |
Methylotrophic bacteria란? | Methylotrophic bacteria는 메탄, 메탄올, 메틸화된 아민, halomethane 등과 같이 C1 화합물을 이용할 수 있는 세균을 지칭하는데, 메탄산화세균은 methylotrophic bacteria에 속하는 대표적인 세균이다. 메탄산화세균은 메탄을 유일 탄소원과 에너지원으로 이용할 수 있는 그람 음성의 호기성 세균이다[2]. | |
메탄을 온실가스인 이산화탄소로 산화시키는 메탄 저감 기술이 온실효과를 줄일 수 있는 이유는? | 따라서 메탄의 궁극적인 저감 기작은 메탄을 이산화탄소로 산화시켜 처리하는 것이다[1]. 비록 메탄의 산화물인 이산화탄소 역시 온실가스이지만, 메탄의 GWP가 이산화탄소 보다 27배나 크기 때문에, 메탄의 온실효과를 1/27 수준으로 저하시키는 효과를 얻을 수 있다. 메탄을 이산화탄소로 산화시키는 과정에서 발열반응이 일어나고 이 반응이 일어나기 위해서는 활성화 에너지(430 kJ/mol)가 필요하다. |
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