Synergistic mechanism of substrate hydrolysis and methanogenesis under "gradient anaerobic digestion" process

被引：13

作者：

Chen, Xiaotian ^{[1
]}

Cui, Zongjun ^{[1
]}

Zhao, Yehua ^{[2
]}

Zhu, Na ^{[2
]}

Liu, Yang ^{[1
]}

Hu, Zihan ^{[1
]}

Yuan, Xufeng ^{[1
]}

机构：

[1] China Agr Univ, Coll Agron, Ctr Biomass Engn, Beijing 100193, Peoples R China

[2] Beijing Yingherui Environm Technol Co Ltd, Beijing 102412, Peoples R China

来源：

ENERGY CONVERSION AND MANAGEMENT | 2024年 / 309卷

关键词：

Gradient anaerobic digestion; Hydrolysis-methanogenesis process; Synergistic relationship; Microbial community structure; Metabolic function; CO-DIGESTION; METHANE PRODUCTION; BIOGAS PRODUCTION; WHEAT-STRAW; PRETREATMENT; STOVER; FERMENTATION; PROPIONATE; CONVERSION; ADDITIVES;

D O I：

10.1016/j.enconman.2024.118443

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The destruction of the synergistic effect of the hydrolysis-methanogenesis process (HMP) of substrate may lead to the serious carbon loss of substrate and low biogas yield in traditional straw biogas engineering. In this study, the influence of substrate composition on anaerobic digestion (AD) was investigated under pilot conditions, and the relationship between HMP was further investigated under full-scale plants. The results showed that straw with a high content of soluble substances had the highest methane yield (264.25 L/kg VS) and degradation rate (59.32 %). At HRT = 20 d, the full-scale plant achieved the highest biogas yield (576.92 L/kg VS, 3.47 L/L/d) and degradation rate (67.50 %). Microbial analysis showed that substrate composition affected microbial community and methanogenic metabolic pathway. The analysis results of PICRUSt2 confirm that gradient AD guarantees the synergistic relationship of HMP. This study provides the theoretical basis and engineering guidance for improving the AD process in traditional straw biogas engineering.

引用

页数：11

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