ETHANOL-PRODUCTION FROM ENZYMATIC HYDROLYSATES OF AFEX-TREATED COASTAL BERMUDAGRASS AND SWITCHGRASS

被引：44

作者：

RESHAMWALA, S

SHAWKY, BT

DALE, BE

机构：

[1] TEXAS A&M UNIV,DEPT CHEM ENGN,COLLEGE STN,TX 77843

[2] NATL RES CTR,DEPT MICROBIAL CHEM,CAIRO,EGYPT

来源：

APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY | 1995年 / 51-2卷

关键词：

ETHANOL; LIGNOCELLULOSE; CELLULASE ENZYMES; AMMONIA FIBER EXPLOSION; KLEBSIELLA OXYTOCA;

D O I：

10.1007/BF02933410

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Switchgrass and coastal bermudagrass were pretreated by ammonia fiber explosion (AFEX), and the treated materials hydrolyzed using 5 IU cellulase/g substrate. Resulting sugar solutions (2-3%, w/v) were fermented with recombinant Klebsiella oxytoca. Glucose was rapidly and completely fermented to ethanol, whereas xylose fermentation was slower and less complete. At higher sugar concentrations (similar to 8%) glucose fermentation continued, but xylose fermentation almost ceased. Protein extraction somewhat enhanced ethanol production from coastal bermudagrass. Improved fermentation technologies and media appear necessary for practical mixed-sugar lignocellulosic hydrolyzates.

引用

页码：43 / 55

页数：13

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