Hydrolysis of wheat straw hemicellulose and detoxification of the hydrolysate for xylitol production
Xylitol can be obtained from wheat straw hemicellulose containing high content of xylan. This study describes a new system of hydrolysis-a mixed solution of formic acid and hydrochloric acid in which xylan can be hydrolyzed effectively.The hydrolysate contains high content of formic acid which inhibit the fermentation obviously. One of the most efficient methods for removing inhibiting compounds is treatment of the hydrolysate with ion-exchange resins. Formate can be removed by 77.78％ and furfural, acetic acid, phenolic compounds can be removed by 90.36％,96.29％,77.44％, respectively after the hydrolysate being treated with superfluous Ca(OH)2 and D311 ion-exchange resin.The hydrolysis-xylose can be fermented by Candida.tropicalis strain(AS2.1776) to produce xylitol with a yield of 41.88 ％(xylitol/xylose).
straw hydrolysate formic acid xylose xylitol fermentation
ZHUANG Junping LIU Ying WU Zhen SUN Yong LIN Lu
Department of Resources Science and Engineering,State Key Lab of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China
国际会议
广州
英文
1389-1393
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）