Bacterial competition for thermophilic L-Iactate and hydrogen fermentation from glucose
The objective of this study is to investigate competition between thermophilic L-lactate fermentation by Bacillus coagulans and hydrogen fermentation. To evaluate the competition clearly, glucose is used as a substrate. For this purpose, batch thermophilic acid fermentation experiments are performed under different conditions of bacterial composition, lactate and antibiotic. Microbial composition is also analyzed by random cloning method. It is concluded that the microbial composition of seed sludge is important to control hydrogen, lactate or other acid fermentation, and the effect of initial hydrogen producing bacterial concentration is negligible under these experimental conditions. The results prove that lactate is the key inhibitor to hydrogen producing bacteria, and antibiotic produced by B. coagulans itself has also some inhibitory effect to hydrogen producing bacteria.
lactate fermentation hydrogen fermentation Bacillus coagulans inhibition glucose antibiotic
T. Hidaka Y. Kosaka H. Yagi Y. Kusuda F. Nishimura H. Tsuno
Department of Environmental Engineering, Kyoto University, Cl,Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan
国际会议
天津
英文
89-99
2011-11-12（万方平台首次上网日期，不代表论文的发表时间）