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《Chinese Journal of Applied & Environmental Biology》 2009-01
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Effect of Straw Pretreatments on Bio-hydrogen Production

LIU Peiwang, YUAN Yuexiang, YAN Zhiying, SONG Li, LIU Xiaofeng, LIAO Yinzhang & HE Rongna (Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China)  
The effects of chemical, biological and chemical-biological pretreatments of straw on bio-hydrogen fermentation and production were comparatively studied. The experiments showed that a considerable portion of cellulose and hemicellulose in straw could be hydrolyzed and converted to reducing sugar by the pretreatments. The best hydrolytic result of straw was attained by 1% H2SO4, and 50 g straw could produce 16.05 g reducing sugar by hydrolysis. The maximum bio-hydrogen production was obtained from the straw with NaOH-biological combination pretreatment, and it reached 21.04 mL g-1, which was 75 times higher than that from the straw without pretreatment. The maximum concentration of H2 was 57.3%, which was 96 times higher than that of the straw with no pretreatment. The optimum pH range was 4.5~6.0, and the optimum substrate concentration ranged between 45 and 55 g L-1. In the process of fermentation, the VFAs mainly consisted of acetate and butyrate.
【Fund】: 国家科技支撑计划项目(No.2006BAD07A00);; 中国科学院项目(No.KSCX2-YW-G-008)资助~~
【CateGory Index】: TQ116.2
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