Enhancing anaerobic digestion performance and degradation of lignocellulosic components of rice straw by combined biological and chemical pretreatment

被引：123
作者：
Guan, Ruolin [1 ]
Li, Xiujin [1 ]
Wachemo, Akiber Chufo [1 ,2 ]
Yuan, Hairong [1 ]
Liu, Yanping [1 ]
Zou, Dexun [1 ]
Zuo, Xiaoyu [1 ]
Gu, Junyu [1 ]
机构：
[1] Beijing Univ Chem Technol, Ctr Resource & Environm Res, Beijing 100029, Peoples R China
[2] Arba Minch Univ, Dept Water Supply & Environm Engn, POB 21, Arba Minch, Ethiopia
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2018年 / 637卷
关键词：
Bio-chemical pretreatment; Liquid fraction of digestate (LFD); Ammonia solution; CaO; Anaerobic digestion; BIOGAS PRODUCTION; CORN STOVER; WHEAT-STRAW; ENZYMATIC-HYDROLYSIS; METHANE PRODUCTION; SODIUM-HYDROXIDE; LIQUID FRACTION; KITCHEN WASTE; BIOMASS; MANURE;
D O I：
10.1016/j.scitotenv.2018.04.366
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In order to determine eco-friendly pretreatment method, the combination of different pretreatment reagents such as: CaO, ammonia solution (AS), liquid fraction of digestate (LFD), CaO-AS and CaO-LFD were used in this study. The features of physico-chemical structures and anaerobic digestion (AD) performance of rice straw were investigated using different combined biological and chemical pretreatment methods. The results showed that CaO-LFD bio-chemical pretreatment achieved the best effect among different pretreatment conditions. The removal rate of lignocellulosic components from CaO-LFD pretreated rice straw was 20.73% higher than that of the control sample. The ether and ester bonds between lignin and hemicellulose were ruptured during pretreatment. Moreover, the methane yield from CaO-LFD pretreated rice straw was 274.65 mL gVS(-1), which was 57.56% more than the control. Compared with the untreated rice straw, T-80 decreased by 42.86%. CaO-LFD combined pretreatment has advantages as both biological and chemical pretreatment, which complement each other to improve the degradation of the rice straw. Meantime, AD performance was improved and excellent economic viability was achieved. Therefore, this study provides sustainable insight for exploring efficient pretreatment strategy to stabilize and enhance AD performance for further application. (C) 2018 Elsevier B.V. All rights reserved.
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页码：9 / 17
页数：9
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