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›› 2007, Vol. 41 ›› Issue (5): 13-17.

• 研究报告 • Previous Articles     Next Articles

Study on Acid Hydrolysis of Wheat Straw and Fermentation of Xylose in Hydrolysate to Xylitol

WU Zhen, LIN Lu, PANG Chun-sheng, SUN Yong, PENG Hong, LI Jia-zhe   

  1. State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2007-01-29 Revised:1900-01-01 Online:2007-09-30 Published:2007-09-30

Abstract: Hemicellulose could be hydrolyzed adequately when wheat straw was retained in the system of formic acid/hydrochloric acid for 0.5 h under 65℃. Straw hydrolysate was fermented by Candida tropicalis to produce xylitol. The effects of different concentration of formic acid and formate on the fermentation of D-xylose were studied. D-xylose could be fermented to produce xylitol availably with a concentration of 2 g/L formic acid or 5 g/L formate. A high concentration of formic acid or formate restrained the fermentation of D-xylose. Straw formic acid hydrolysate could be fermented to produce xylitol after the formate was removed by ion exchange resins of D311. All xylose was consumed within 72 h with a xylitol yield of 16.88%(xylitol/xylose).

Key words: wheat straw hydrolysis, formic acid, xylose, xylitol, fermentation

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