基于固液分离预处理的餐厨垃圾厌氧发酵

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Abstract A semi-continuous anaerobic digestion (AD) experiment was set up to evaluate the methanogenesis potential of kitchen waste (KW) after different pretreatment modes. After the solid, liquid and oil three-phase separation pretreatment, the liquid-phase KW achieved a higher volatile solid (VS) removal rate, experimental methane potential (EMP) and methane conversion rate than the mixed one of solid-liquid phases, which were 91.2%, 531.5mLCH₄/gVS, and 54.3%, respectively. The results indicated that the medium-temperature wet AD displayed a satisfying effect on KW reduction and resource utilization when using the liquid-phase KW as the feedstock. The microbial community analysis showed that the microbial community succession in the AD system was affected by the KW pretreatment method. The ammonia concentration was the key factor to induce the variation and abundance shifts of the archaeal community. The hydrogenotrophic methanogen, methanoleus was the dominant methanogens in the AD system with the KW liquid phase as the feedstock. The methanosarcina, which was reported to be able to resist high concentrations of ammonia nitrogen was the dominant methanogens in the AD system with the feedstock of the KW solid-liquid phase mixture.

Key words： kitchen waste anaerobic digestion pretreatment microbial community

Received: 01 August 2021

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X705

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	Articles by authors
	ZHANG Jing-xue
	LI Pan-pan
	YU Yang
	CENG Su
	YU Ran
	YANG Guang-ping

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ZHANG Jing-xue,LI Pan-pan,YU Yang等. Study on anaerobic digestion of kitchen waste based on solid-liquid separation pretreatment[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(3): 1252-1258.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I3/1252

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