Dilute acid pretreatment of rapeseed straw for fermentable sugar generation

被引：58

作者：

Castro, Eulogio ^{[1
]}

Diaz, Manuel J. ^{[1
]}

Cara, Cristobal ^{[1
]}

Ruiz, Encarnacion ^{[1
]}

Romero, Inmaculada ^{[1
]}

Moya, Manuel ^{[1
]}

机构：

[1] Univ Jaen, Dept Chem Environm & Mat Engn, Jaen 23071, Spain

来源：

BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 02期

关键词：

Agricultural residues; Dilute acid pretreatment; Enzymatic hydrolysis; Rapeseed straw; ENZYMATIC-HYDROLYSIS; CORN STOVER; LIGNOCELLULOSICS; OPTIMIZATION; BIOMASS; YIELDS;

D O I：

10.1016/j.biortech.2010.08.057

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The influence of the main pretreatment variables on fermentable sugar generation from rapeseed straw is studied using an experimental design approach. Low and high levels for pretreatment temperature (140-200 degrees C), process time (0-20 min) and concentration of sulfuric acid (0.5-2% w/v) were selected according to previous results. Glucose and xylose composition, as well as sugar degradation, were monitored and adjusted to a quadratic model. Non-sugar components of the hydrolysates were also determined. Enzymatic hydrolysis yields were used for assessing pretreatment performance. Optimization based on the mathematical model show that total conversion of cellulose from pretreated solids can be achieved at pretreatment conditions of 200 degrees C for 27 min and 0.40% free acid concentration. If optimization criteria were based on maximization of hemicellulosic sugars recovery in the hydrolysate along with cellulose preservation in the pretreated solids, milder pretreatment conditions of 144 degrees C, 6 min and 2% free acid concentration should be used. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1270 / 1276

页数：7

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