期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 167, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.bej.2020.107873
关键词
Microaerobic pretreatment; Dry anaerobic digestion; Microbial community; Corn stalk; Methane production
资金
- National Natural Science Foundation of China [21978289]
- Chinese Academy of Sciences Strategic Leading Science and Technology Project (Class A) [XDA21050400]
- Guangdong Province Science and Technology Project [2017B020238005]
- Key R&D Project of Jiangxi Province [20171ACG70020]
- Major research and development projects in Jiangxi Province [20182ABC28006]
- Guangzhou Science and Technology Project [201803030007]
The study showed that micmaembic pretreatment (MP) can improve the stability and biogas production performance of thermophilic dry anaerobic digestion (AD). Proper MP enhanced methane production, reduced environmental risks, promoted substrate hydrolysis and improved AD performance by accelerating the growth of hydrogenotrophic methanogens.
In this study, micmaembic pretreatment (MP) was used to improve the system stability and biogas production performance of the thermophilic dry anaerobic digestion (AD). The results showed that proper MP made the AD have better methane-producing performance and the maximum cumulative methane production was 108.31 mL/g VS with an oxygen load of 5 mL/g VS, which was 13.20 % higher than that of control group (G1, 95.68 mL/g VS). Specific micmaerobic conditions promoted the generation of volatile fatty acid (VFA) and reduced propionic acid content in the digestive system. In addition, the volatile solid (VS) removal rate of the digestive substrates was improved in the presence of limited oxygen, which can reduce environmental risks. Microbial community diversity indicated that MP increased the relative abundance of Firmicutes to promote substrate hydrolysis and accelerated the growth of hydrogenotrophic methanogens to improve AD performance.
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