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›› 2007, Vol. 41 ›› Issue (3): 11-14.

• 研究报道 • Previous Articles     Next Articles

Effect of Temperature Modulation on Hydrogen Fermentation from Steam Exploded Straw

LI Dong-min, CHEN Hong-zhang   

  1. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, CAS, Beijing 100080, China
  • Received:2006-12-22 Revised:1900-01-01 Online:2007-05-30 Published:2007-05-30

Abstract: Hydrogen was produced by simultaneous saccharification and fermentation from steam exploded straw using Clostridium butyricum AS1.209. However, the optimum temperature of enzymatic hydrolysis is far away from that of fermentation and the utilization of substrate is limited. To solve the problem of inconsistent temperature, the reaction temperature was modulated for two times when fermentation processed at the time of 10h and 30h, respectively. The temperature quickly increased to 45℃ and then decreased back to 35℃ after maintaining for 2 h. The temperature modulation was favorable for enzymatic hydrolysis and fermentation. The hydrogen yield of temperature changing process was 1.2 times higher than that at constant temperature. The conversion rates of cellulose and hemicellulose were 75% and 88%, respectively.

Key words: steam exploded straw, hydrogen fermentation, temperature modulation

CLC Number: