Improving the methane yield of maize straw: Focus on the effects of pretreatment with fungi and their secreted enzymes combined with sodium hydroxide

被引：68
作者：
Zhao, Xiaoling [1 ]
Luo, Kai [1 ]
Zhang, Yue [1 ]
Zheng, Zehui [1 ]
Cai, Yafan [1 ]
Wen, Boting [2 ]
Cui, Zongjun [1 ]
Wang, Xiaofen [1 ]
机构：
[1] China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China
[2] Chinese Acad Agr Sci, Inst Food Sci & Technol, Beijing 100193, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2018年 / 250卷
关键词：
Fungal pretreatment; Enzymatic pretreatment; NaOH pretreatment; Maize straw; Methane yield; ANAEROBIC-DIGESTION; CELLULASE PRODUCTION; ALKALINE PRETREATMENT; TRICHODERMA-REESEI; RICE STRAW; SILAGE; FERMENTATION; OPTIMIZATION; SLUDGE; MODEL;
D O I：
10.1016/j.biortech.2017.09.160
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In order to improve the methane yield, the alkaline and biological pretreatments on anaerobic digestion (AD) were investigated. Three treatments were tested: NaOH, biological (enzyme and fungi), and combined NaOH with biological. The maximum reducing sugar concentrations were obtained using Enzyme T (2.20 mg/mL) on the 6th day. The methane yield of NaOH+Enzyme A was 300.85 mL/g TS, 20.24% higher than the control. Methane yield obtained from Enzyme (T+A) and Enzyme T pretreatments were 277.03 and 273.75 mL/g TS, respectively, which were as effective as 1% NaOH (276.16 mL/g TS) in boosting methane production, and are environmentally friendly and inexpensive biological substitutes. Fungal pretreatment inhibited methane fermentation of maize straw, 15.68% was reduced by T+A compared with the control. The simultaneous reduction of DM, cellulose and hemicellulose achieved high methane yields. This study provides important guidance for the application of enzymes to AD from lignocellulosic agricultural waste.
引用
收藏
页码：204 / 213
页数：10
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