文档介绍：Biogas technology in china Biogas technology in china Zhiying Yan Zhiying Yan Student number: 174 Student number: 174 Chengdu institute of biology, CAS Chengdu institute of biology, CAS 1. The conception of biogas 1. The conception of biogas what what ’’ s the biogas ? s the biogas ? It is originally called swamp gas just because It is originally called swamp gas just because people found it in swamp area. Also, it is be people found it in swamp area. Also, it is be called biogas due to production of this gas by called biogas due to production of this gas by biological metabolism under anaerobic biological metabolism under anaerobic conditions. conditions. 2. 2. The fermentation of biogas and its The fermentation of biogas and its ’’ posing Biogas fermentation, widely distributed in the Biogas fermentation, widely distributed in the nature, is the bioconversion process by which nature, is the bioconversion process by which organic matter is degraded and converted into organic matter is degraded and converted into inflammable gas by many kinds of microbes at inflammable gas by many kinds of microbes at anaerobic conditions. Fermentation materials is anaerobic conditions. Fermentation materials is very available very available such as human or livestock such as human or livestock ’’ s s manure, manure, straw, waste water and waste residuals straw, waste water and waste residuals from factories. from factories. Its Its’’ posing is methane (CH posing is methane (CH 4 4 ), ), which content is 55-70%. Then, it is carbon which content is 55-70%. Then, it is carbon dioxide (CO dioxide (CO 2 2 ), which content is 30-45%. There ), which content is 30-45%. There is still a little nitrogen gas (N is still a little nitrogen gas (N 2 2 ), hydrogen gas ), hydrogen gas (H (H 2 2 ),sulfurated hydrogen (H ),sulfurated hydrogen (H 2 2 S), and so on. So S), and so on. So biogas technology can not only anic biogas technology can n