Enhancing cellulose accessibility of corn stover by deep eutectic solvent pretreatment for butanol fermentation

被引：319
作者：
Xu, Guo-Chao [1 ]
Ding, Ji-Cai [1 ]
Han, Rui-Zhi [1 ]
Dong, Jin-Jun [1 ]
Ni, Ye [1 ]
机构：
[1] Jiangnan Univ, Sch Biotechnol, Minist Educ, Key Lab Ind Biotechnol, Wuxi 214122, Jiangsu, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2016年 / 203卷
基金：
中国国家自然科学基金;
关键词：
Corn stover; Deep eutectic solvent; Pretreatment; Butanol fermentation; Ionic liquid; COMBINING IONIC LIQUID; ENZYMATIC SACCHARIFICATION; LIGNOCELLULOSIC BIOMASS; HYDROLYSIS; ACID; SYSTEM;
D O I：
10.1016/j.biortech.2015.11.002
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this study, an effective corn stover (CS) pretreatment method was developed for biobutanol fermentation. Deep eutectic solvents (DESs), consisted of quaternary ammonium salts and hydrogen donors, display similar properties to room temperature ionic liquid. Seven DESs with different hydrogen donors were facilely synthesized. Choline chloride: formic acid (ChCl: formic acid), an acidic DES, displayed excellent performance in the pretreatment of corn stover by removal of hemicellulose and lignin as confirmed by SEM, FTIR and XRD analysis. After optimization, glucose released from pretreated CS reached 17.0 g L-1 and yield of 99%. The CS hydrolysate was successfully utilized in butanol fermentation by Clostridium saccharobutylicum DSM 13864, achieving butanol titer of 5.63 g L-1 with a yield of 0.17 g g(-1) total sugar and productivity of 0.12 g L-1 h(-1). This study demonstrates DES could be used as a promising and biocompatible pretreatment method for the conversion of lignocellulosic biomass into biofuel. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：364 / 369
页数：6
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