Ethanol production from rice straw using optimized aqueous-ammonia soaking pretreatment and simultaneous saccharification and fermentation processes

被引:236
作者
Ko, Ja Kyong [1 ]
Bak, Jin Seop [1 ]
Jung, Min Woo [1 ]
Lee, Hee Jin [1 ]
Choi, In-Geol [1 ]
Kim, Tae Hyun [2 ]
Kim, Kyoung Heon [1 ]
机构
[1] Korea Univ, Sch Life Sci & Biotechnol, Seoul 136713, South Korea
[2] Iowa State Univ, Dept Agr & Biosyst Engn, Ames, IA 50011 USA
关键词
Pretreatment; Ammonia; Lignocellulose; Lignin; Ethanol; ENZYMATIC-HYDROLYSIS; BIOETHANOL PRODUCTION; LIGNOCELLULOSIC MATERIALS; CORN STOVER; XYLANASE; BIOMASS; DELIGNIFICATION; LIGNIN; SUGAR; YIELD;
D O I
10.1016/j.biortech.2009.04.026
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Rice straw was pretreated using aqueous-ammonia solution at moderate temperatures to enable production of the maximum amount of fermentable sugars from enzymatic hydrolysis. The effects of various operating variables including pretreatment temperature, pretreatment time, the concentration of ammonia and the solid-to-liquid ratio on the degree of lignin removal and the enzymatic digestibility were optimized using response surface methodology. The optimal reaction conditions, which resulted in an enzymatic digestibility of 71.1%, were found to be 69 degrees C, 10 h and an ammonia concentration of 21% (w/w). The effects of different commercial cellulases and the additional effect of a non-cellulolytic enzyme, xylanase. were also evaluated. Additionally, simultaneous saccharification and fermentation was conducted with rice straw to assess the ethanol production yield and productivity. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:4374 / 4380
页数:7
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