期刊
BIORESOURCE TECHNOLOGY
卷 333, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125205
关键词
Cow manure; High solid anaerobic digestion; Solid content; Methane production; Methanogenic pathways
资金
- Natural Science Foundation of China [51678338]
This study demonstrates that high solid anaerobic digestion of cow manure can achieve a stable gas production process under appropriate conditions. As the solid content increases, the gas production rate decreases, but can still be maintained at a relatively high level. The abundances of relevant microbial communities also increase accordingly.
High solid anaerobic digestion has become the mainstream technology for sustainable on-farm treatment of solid wastes but has not been optimized with respect to increasing solid content in cow manure (CM). In the present study, CM was batch digested at total solid (TS) of 5%, 10%, 15% and 20% and microbial communities were investigated. The process remained stable up to 15% TS. The biomethane production rate at TS of 10% and 15% was reported to be 352.2 mL g-1 VS and 318.6 mL g-1 VS, reaching up to 83% and 75% of TS 5% biomethane, respectively. Kinetics results disclosed that the biodegradable organics could be utilized at increasing solid content with decreasing hydrolysis rate. The abundances of hydrogenotrophic and methylotrophic methanogens increased significantly with increasing solid content. This study is of great importance for understanding and application of high solid anaerobic digestion of cow manure.
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