产酸发酵细菌产氢机理探讨  

STUDY ON THE MECHANISM OF BACTERIAL HYDROGEN EVOLUTION BY FERMENTATION

作　　者：任南琪[1] 李建政[1] 林明[1] 王勇[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《太阳能学报》2002年第1期124-128,共5页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究发展规划 (973 )项目 (G2 0 0 0 0 2 64 0 2 )

摘　　要：生物制氢技术在世界范围内受到了普遍重视 ,对于生物产氢的机理研究也在不断深入 ,为生物制氢技术的开发打下坚实的基础。该文在前人研究成果的基础上 ,对产酸发酵细菌的多种产氢途经和机理进行了全面探讨。分析认为 ,在产酸相反应器中的产酸发酵发酵细菌 ,其主要产氢途径是丙酮酸脱羧产氢和辅酶I的氧化与还原平衡调节产氢。通过生化反应的热力学分析证明 ,即便是氢分压高达 0 5个标准大气压时 ,只要生境中 pH值小于4 78,NADH +H+The study on the mechanism of hydrogen evolution by microorganism provides the groud to develop the technology of bioproducing hydrogen.In orde to investigate the mechanism of bacterial hydrogen evolution by fermentation,four approaches were developed and analyzed from physiological and thermodynamic point of view based on the results in this field.Among the four approaches,the oxidative decarboxylation of pyruvic acid to acetyl-CoA and the balance adjustment of codehydrogenase 1 were the dominating modes in the acidogenic phase reactor.The results showed that even the hydrogen partial pressure was up to 0 5 atmospheric pressure,the reaction of hydrogen production from NADH+H + could be carride out just when the pH of medium was below 4 78.

关 键 词：产酸发酵 细菌 机理 PH值 产酸相反应器 丙酮酸脱羧 生物制氢技术 

分 类 号：TQ92[轻工技术与工程—发酵工程] TQ116.2