Ethanol prefermentation of food waste in sequencing batch methane fermentation for improved buffering capacity and microbial community analysis

文献类型: 外文期刊

第一作者: Yu, Miao

作者: Yu, Miao;Wu, Chuanfu;Wang, Qunhui;Ren, Yuanyuan;Sun, Xiaohong;Li, Yu-You

作者机构:

关键词: Food waste;Methane fermentation;Ethanol prefermentation;Microbial community;High-throughput sequencing

期刊名称:BIORESOURCE TECHNOLOGY ( 影响因子:9.642; 五年影响因子:9.237 )

ISSN: 0960-8524

年卷期: 2018 年 248 卷

页码:

收录情况: SCI

摘要: This study investigates the effects of ethanol prefermentation (EP) on methane fermentation. Yeast was added to the substrate for EP in the sequencing batch methane fermentation of food waste. An Illumina MiSeq high-throughput sequencing system was used to analyze changes in the microbial community. Methane production in the EP group (254 mL/g VS) was higher than in the control group (35 mL/g VS) because EP not only increased the buffering capacity of the system, but also increased hydrolytic acidification. More carbon source was converted to ethanol in the EP group than in the control group, and neutral ethanol could be converted continuously to acetic acid, which promoted the growth of Methanobacterium and Methanosarcina. As a result, the relative abundance of methane-producing bacteria was significantly higher than that of the control group. Kinetic modeling indicated that the EP group had a higher hydrolysis efficiency and shorter lag phase. (C) 2017 Elsevier Ltd. All rights reserved.

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