厨余垃圾厌氧发酵失稳调控及微生物群落分析

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Abstract Aiming at the problems caused by the accumulation of propionic acid and butyric acid during anaerobic digestion, the sludge with propionic acid and butyric acid tolerant microorganism were domesticated, and they were added into the acidified systems of dry anaerobic digestion of kitchen waste to explore the effects on methane production and microbial communities. After treated by the sludge with propionic acid and butyric acid tolerant bacteria, the propionic acid concentration reduced by 6900.81mg/L, and the cumulative methane production increased by 259%, while the butyric acid concentration reduced by 5371.56mg/L, and the cumulative methane production increased by 210%, respectively. The richness of bacteria in the acidified systems was significantly improved after the regulation with propionic acid and butyric acid tolerant bacteria. The analysis of microbial community structure at genus level showed that the relative abundance of Sporanaerobacter and Proteiniphilum, having the ability of degrading volatile fatty acids, began to increase in the reactors treated by the sludge with propionic acid tolerant bacteria. After adding the sludge with butyric acid tolerant bacteria, the relative abundance of Sporanaerobacter increased. Sporanaerobacter have a synergistic effect with acetic acid methanogens. According to the analysis of archaea, the relative abundance of hydro methanogens and acetic acid methanogens increased in the groups treated with propionic acid and butyric acid tolerant bacteria, respectively.

Key words： kitchen waste dry anaerobic fermentation regulation of acidified anaerobic fermentation system microbial community

Received: 13 September 2021

PACS:	X705
	X703.5

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	WANG Pan
	YANG Xin-yu
	ZHENG Yi
	REN Lian-hai

Cite this article:

WANG Pan,YANG Xin-yu,ZHENG Yi等. Regulation of acidified dry anaerobic digestion of kitchen waste and microbial community analysis[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(4): 1770-1779.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I4/1770

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