Enhancement effect of biochar addition on anaerobic co-digestion of pig manure and corn straw under biogas slurry circulation

被引：25

作者：

Huang, Xinning ^{[1
,2
,3
]}

Miao, Xinying ^{[1
,2
,3
]}

Chu, Xiaodong ^{[1
,2
,3
]}

Luo, Lina ^{[1
,2
,3
]}

Zhang, Hongqiong ^{[1
,2
,3
]}

Sun, Yong ^{[1
,2
,3
,4
]}

机构：

[1] Northeast Agr Univ, Harbin, Peoples R China

[2] Key Lab Agr Renewable Resources Utilizat Technol &, Harbin 150030, Peoples R China

[3] Minist Agr, Key Lab Pig breeding Facil Engn, Harbin, Peoples R China

[4] Northeast Agr Univ, Coll Engn, Harbin 150030, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 372卷

基金：

国家重点研发计划;

关键词：

Anaerobic co -digestion; Livestock manure; Microbial community; Methane metabolic pathways; METHANE PRODUCTION; ELECTRON-TRANSFER;

D O I：

10.1016/j.biortech.2023.128654

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Based on the semi-continuous anaerobic co-digestion (AcoD) reactor, the effects of biochar addition on the in-ternal environmental changes and gas production characteristics were studied under the condition of biogas slurry recirculation. The results showed that the addition of biochar enhanced the degradation and metabolic pathways of acetate and propionate, thereby reducing the concentrations of volatile fatty acids (VFAs), total ammonia and chemical oxygen demand by 55 %, 41 % and 61 %, respectively. The buffer system formed by the combination of NH4+ and VFAs of C2-C5 was also enhanced, thereby improving the stability of the system. The addition of biochar effectively increased the relative abundance of Bacteroidetes, Chloroflexi, Spirochaetota and Synergistota, and enhanced three methanogenic metabolic pathways. This study provides scientific support for the application of biochar to solve the system inhibition in mixed substrate semi-continuous AcoD process and provides technical support for the stable operation of biogas project.

引用

页数：10

共 25 条

[1] Effect of viscosity on process stability and microbial community composition during anaerobic mesophilic digestion of Maotai-flavored distiller's grains [J].