標題: Study of chemical pretreatment and enzymatic saccharification for producing fermentable sugars from rice straw
作者: Chen, Wen-Hsing
Chen, Yi-Chun
Lin, Jih-Gaw
環境工程研究所
Institute of Environmental Engineering
關鍵字: Process integration;Chemical pretreatment;Rice straw;Glucose;Cellulase;Enzymatic saccharification
公開日期: 1-七月-2014
摘要: This study evaluated a cost-effective approach for the conversion of rice straw into fermentable sugars. The composition of rice straw pretreated with 1 % sulfuric acid or 1 % sodium hydroxide solution was compared to rice straw with no chemical pretreatment. Enzymatic saccharification experiments on non-pretreated rice straw (NPRS), pretreated rice straw (PRS), and pretreated rice straw with acid hydrolysate (PRSAH) were conducted in a series of batch reactors. The results indicated that pretreating the rice straw with dilute acid and base increased the cellulose content from 38 % to over 50 %. During enzymatic saccharification, straight aliphatic cellulose was hydrolyzed before branched hemicellulose, and glucose was the major hydrolysis product. The glucose yield was 0.52 g glucose/g for NPRS and was comparable to the yields of 0.50 g glucose/g for PRS and 0.58 g glucose/g for PRSAH. The hydrolysis of rice straw to produce glucose can be described by a first-order reaction with a rate constant of 0.0550 d(-1) for NPRS, 0.0653 d(-1) for PRSAH, and 0.0654 d(-1) for PRS. Overall, the production of fermentable sugars from ground rice straw will be more cost effective if the straw is not pretreated with chemicals.
URI: http://dx.doi.org/10.1007/s00449-013-1106-0
http://hdl.handle.net/11536/24617
ISSN: 1615-7591
DOI: 10.1007/s00449-013-1106-0
期刊: BIOPROCESS AND BIOSYSTEMS ENGINEERING
Volume: 37
Issue: 7
起始頁: 1337
結束頁: 1344
顯示於類別:期刊論文


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  1. 000338237700011.pdf