How exothermic characteristics of rice straw during anaerobic digestion affects net energy production

文献类型： 外文期刊

第一作者： Luo, Tao

作者： Luo, Tao;Ge, Yihong;Mei, Zili;Fu, Yanran;Khoshnevisan, Benyamin;Pan, Junting;Liu, Hongbin;Xue, Jian

作者机构：

关键词： Anaerobic digestion; Hydrolysis rate; Self-heating; Straw

期刊名称：ENERGY （ 影响因子：7.147； 五年影响因子：6.845 ）

ISSN： 0360-5442

年卷期： 2020 年 212 卷

页码：

收录情况： SCI

摘要： The self-heating of lignocellulosic biomass, when degraded under anaerobic conditions, has been reportedly observed. Such a phenomenon would cause substrate to show exothermic characteristics which are in contrast to the current thermodynamic or microbiological knowledge. Rice straw (RS), when undergone anaerobic digestion, is prone to self-heating which can increase the reactor temperature according to heat-releasing characteristics, thus improve the net energy production. In the present study, the relationship of biogas production and self-heating release as well as the synergistic effects of two energy production pathways was investigated. Moreover, the optimal process for maximizing the biogas production under self-heating phenomenon was scrutinized. Compared to control assays, a 0.48 degrees C increase in average temperature was noticed among experimental trials due to RS self-heating phenomenon. The results showed that the self-heating was even improved simultaneous with increased methane production rate. Hydrolysis rate and total solid content were found to be possible promising options to control the self-heating release. (C) 2020 Elsevier Ltd. All rights reserved.

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