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Pretreatment of rice straw by a hot-compressed water process for enzymatic hydrolysis.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Yu, Guoce Yano, Shinichi Inoue, Hiroyuki Inoue, Seiichi Endo, Takashi Sawayama, Shigeki
Description	Country affiliation: Japan Author Affiliation: Yu G ( Biomass Technology Research Center, National Institute of Advanced Industrial Science and Technology, Hiroshima, Japan. yugc@tsinghua.edu.cn)
Abstract	Hot-compressed water (HCW) is among several cost-effective pretreatment processes of lignocellulosic biomass for enzymatic hydrolysis. The present work investigated the characteristics of HCW pretreatment of rice straw including sugar production and inhibitor formation in the liquid fraction and enzymatic hydrolysis of pretreated material. Pretreatment was carried out at a temperature ranging from 140 to 240 degrees C for 10 or 30 min. Soluble oligosaccharides were found to constitute almost all the components of total sugars in the liquid fraction. The maximal production of total glucose at 180 degrees C and below accounted for 4.4-4.9% of glucan in raw material. Total xylose production peaked at 180 degrees C, accounting for 43.3% of xylan in raw material for 10-min pretreatment and 29.8% for 30-min pretreatment. The production of acetic acid increased at higher temperatures and longer treatment time, indicating more significant disruption of lignocellulosic structure, and furfural production achieved the maximum (2.8 mg/ml) at 200 degrees C for both 10-min and 30-min processes. The glucose yield by enzymatic hydrolysis of pretreated rice straw was no less than 85% at 180 degrees C and above for 30-min pretreatment and at 200 degrees C and above for 10-min pretreatment. Considering sugar recovery, inhibitor formation, and process severity, it is recommended that a temperature of 180 degrees C for a time of 30 min can be the most efficient process for HCW pretreatment of rice straw.
File Format	HTM / HTML
ISSN	02732289
Issue Number	2
Volume Number	160
e-ISSN	15590291
Journal	Applied Biochemistry and Biotechnology
Language	English
Publisher	Springer
Publisher Date	2010-01-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Biochemistry Discipline Biotechnology Biotechnology Methods Enzymes Chemistry Oryza Sativa Biomass Fermentation Glucose Analysis Metabolism Hot Temperature Hydrolysis Saccharomyces Cerevisiae Xylose Evaluation Studies Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Environmental Engineering Biochemistry Bioengineering Applied Microbiology and Biotechnology Biotechnology

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Pretreatment of Rice Straw by a Hot-Compressed Water Process for Enzymatic Hydrolysis

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