Effect of Ca(OH)2 pretreatment on extruded rice straw anaerobic digestion

被引：112

作者：

Gu, Yu ^{[1
]}

Zhang, Yalei ^{[1
]}

Zhou, Xuefei ^{[1
]}

机构：

[1] Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Key Lab Yangtze Water Environm,Minist Educ, Shanghai 200092, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 196卷

关键词：

Biogas production; Ca(OH)(2) pretreatment; Enzyme hydrolysis; Extrusion pretreatment; Rice straw; WHEAT-STRAW; ENZYMATIC DIGESTIBILITY; METHANE PRODUCTION; HYDROLYSIS; FERMENTATION;

D O I：

10.1016/j.biortech.2015.07.004

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

It has been proven that extrusion can change the structure of rice straw and increase biogas production, but the effect of a single pretreatment is limited. Ca(OH)(2) pretreatment was used to enhance the enzyme hydrolysis and biogas production of extruded rice straw. After Ca(OH)(2) pretreatment, the glucose and xylose conversion rates in enzymatic hydrolysis increased from 36.0% and 22.4% to 66.8% and 50.2%, respectively. The highest biogas production observed in 8% and 10% Ca(OH)(2) pretreated rice straw reached 564.7 mL/g VS and 574.5 mL/g VS, respectively, which are 34.3% and 36.7% higher than the non-Ca(OH)(2)-loaded sample. The Ca(OH)(2) pretreatment can effectively remove the lignin and increase the fermentable sugar content. The structural changes in the extruded rice straw have also been analyzed by XRD, FTIR, and SEM. Considering all of the results, an 8% Ca(OH)(2) loading rate is the best option for the pretreatment of extruded rice straw. (C) 2015 Published by Elsevier Ltd.

引用

页码：116 / 122

页数：7

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