Comparison of four different chemical pretreatments of corn stover for enhancing enzymatic digestibility

被引：208

作者：

Chen, Ming ^{[1
]}

Zhao, Jing ^{[1
]}

Xia, Liming ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Chem Engn & Bioengn, Hangzhou 310027, Peoples R China

来源：

BIOMASS & BIOENERGY | 2009年 / 33卷 / 10期

关键词：

Corn (Zea mays L.) stover; Pretreatment; Lignin removal; Enzymatic digestibility; Ethanol fermentation; Lignocellulosic biomass; ETHANOL-PRODUCTION; LIME PRETREATMENT; HYDROLYSIS; CELLULASE; AMMONIA;

D O I：

10.1016/j.biombioe.2009.05.025

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Four commonly used chemical pretreatment processes based on dilute acid, lime, aqueous ammonia steeping followed by dilute acid hydrolysis, and sodium hydroxide, were evaluated to provide comparative performance data. An obverse correlation between lignin removal and enzymatic digestibility of pretreated corn stover was observed. Compared with other three pretreatments, pretreatment of corn stover with 2% NaOH substantially increased the lignin removal and enhanced the accessibility and digestibility of cellulose. The hydrolysis yield of NaOH-pretreated corn stover reached 81.2% by 48 h at 8.0% substrate concentration and cellulase dosage of 20 FPU g(-1) substrate. Chemical analysis showed that the enzymatic hydrolysate from NaOH-pretreated corn stover contained higher content of fermentable sugars and less inhibitors, which is suitable for subsequent fermentation process to produce ethanol. The research results are meaningful in bioconversion and utilization of renewable lignocellulosic biomass. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1381 / 1385

页数：5

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