The enhancement of pretreatment and enzymatic hydrolysis of corn stover by FeSO4 pretreatment

被引：62

作者：

Zhao, Jing ^{[1
]}

Zhang, Hongman ^{[1
]}

Zheng, Rongping ^{[1
]}

Lin, Zengxiang ^{[2
]}

Huang, He ^{[2
]}

机构：

[1] Nanjing Univ Technol, Coll Sci, Nanjing 210009, Jiang Su, Peoples R China

[2] Nanjing Univ Technol, Coll Life Sci & Pharm, Nanjing 210009, Jiang Su, Peoples R China

来源：

BIOCHEMICAL ENGINEERING JOURNAL | 2011年 / 56卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Hemicellulose; Cellulose; Ferrous sulfate; Pretreatment; Enzymatic hydrolysis; Corn stover; INORGANIC SALTS; LIGNIN; XYLAN; CELLULOSE; HEMICELLULOSE; TECHNOLOGIES; OPTIMIZATION; PYROLYSIS; SUGARS; IMPACT;

D O I：

10.1016/j.bej.2011.06.002

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

FeSO4 was investigated as a catalyst for the pretreatment of corn stover. It was observed that FeSO4 significantly increased the hemicellulose degradation in aqueous solutions heated between 140 and 200 degrees C with high xylose recovery and low cellulose removal. Optimum pretreatment conditions were 0.1 mol/L FeSO4 at 180 degrees C for 20 min. The cellulose conversion was 36.4% higher than that pretreated by hot water under the same enzymatic hydrolysis conditions. The hydrolysis efficiencies of treated materials were characterized by reaction rate constants. Km and the activity of cellulase. The results showed that FeSO4 pretreatment apparently removed the hemicellulose, promoted the activity of cellulase and enhanced the accessibility of cellulase to cellulose, thus significantly increased the enzymatic digestibility. FeSO4 pretreatment could disrupt almost all ester linkages between cellulose and hemicellulose. The results obtained indicated that FeSO4 pretreatment as a special pretreatment method could enhance enzymatic hydrolysis of lignocellulosic biomass by destructing chemical composition and altering structural features. (C) 2011 Elsevier B.V. All rights reserved,

引用

页码：158 / 164

页数：7

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