Biochemical Mechanism of Fermentative Hydrogen Production by Bacteria

摘要：

The three fermentation types are discussed in fermentative hydrogen production by mixed culture. Butyric acid-type and ethanol-type are main hydrogen production pathways in mixed culture system. The optimum liquid phase terminal fermentation product of acid-producing phase is the same with that of organism hydrogen-producing, so one of acetic acid and ethanol and butyric acid can be used as the optimum liquid phase terminal fermentation product. Fermentation bacteria lack electron transfer system, and therefore redundant electrons formed through dehydrogenation in fermentation must be removed through other routes. NADH/NAD+ is often used as a media inside organism. Fermentation process is controlled by NADH+H+ negative feedback and NADH/NAD+ equilibrium adjustment is one of the keys to control fermentation product. There are two routes for fermentative hydrogen evolution. Firstly, direct H2-producing route is in biochemical reaction. Secondly, NADH/NAD+ equilibrium adjustment produces H2. The utilization of H2 by homo-type acetic acid-producing bacteria is thought as interspecies hydrogen transfer.

关键词： Fermentative hydrogen fermentation types ethanol-type fermentation NADH/NAD+ equilibrium

作者: YUE Liran LI Yongfeng REN Nanqi LIU Xiaoye XIONG Xiaojing LI Jianzheng

作者单位: Forestry College,Northeast Forestry University,Harbin 150040,Heilongjiang,China Forestry College,Northeast Forestry University,Harbin 150040,Heilongjiang,China Municipal and Enviro Municipal and Environmental Engineering School,Harbin Institute of Technology,Harbin 150090,Heilongj College of Chemistry and Chemical Engineering,Shanghai University Engineering and Science,Shanghai 2

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 502-510

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）