Pretreatment of corn stover with diluted acetic acid for enhancement of acidogenic fermentation

被引：39

作者：

Zhao, Xu ^{[1
]}

Wang, Lijuan ^{[2
]}

Lu, Xuebin ^{[1
]}

Zhang, Shuting ^{[1
]}

机构：

[1] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China

[2] Aerosp Environm Engn Co Ltd, Beijing 100074, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 158卷

基金：

中国国家自然科学基金;

关键词：

Pretreatment; Acetic acid; Corn stover; Acidogenic fermentation; HYDROGEN-PRODUCTION; HYDROTHERMAL PRETREATMENT; ANAEROBIC-DIGESTION; XYLOSE; OPTIMIZATION; HYDROLYSIS; STRAW;

D O I：

10.1016/j.biortech.2014.01.122

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A Box-Behnken design of response surface method was used to optimize acetic acid-catalyzed hydrothermal pretreatment of corn stover, in respect to acid concentration (0.05-0.25%), treatment time (5-15 min) and reaction temperature (180-210 degrees C). Acidogenic fermentations with different initial pH and hydrolyzates were also measured to evaluate the optimal pretreatment conditions for maximizing acid production. The results showed that pretreatment with 0.25% acetic acid at 191 degrees C for 7.74 min was found to be the most optimal condition for pretreatment of corn stover under which the production of acids can reach the highest level. Acidogenic fermentation with the hydrolyzate of pretreatment at the optimal condition at the initial pH = 5 was shown to be butyric acid type fermentation, producing 21.84 g acetic acid, 7.246 g propionic acid, 9.170 butyric acid and 1.035 g isovaleric acid from 100 g of corn stover in 900 g of water containing 2.25 g acetic acid. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：12 / 18

页数：7

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