厨余垃圾与污泥厌氧发酵产甲烷的协同作用

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Abstract Excess sludge and kitchen waste were co-fermented to evaluate the synergistic effect of anaerobic fermentation. Based on the volatile solid suspension, excess sludge and kitchen waste ratios of 1:0, 4:1, 2:1, 1:1, 1:2, 1:4, 0:1 were employed to conduct the biochemical methane potential experiments. The synergistic methanogenic effect was evaluated by combining the changes of pH, COD, TN, NH₄⁺-N, NO₃^--N, gas production, carbon migration and transformation, and microbial community structure before and after anaerobic fermentation. During anaerobic fermentation of excess sludge, the addition of kitchen waste could significantly improve the sludge degradation ability of microorganisms and increase methane production. The maximum methane production at the ratio of 1:4was 274.37mL/g-VSS, with a synergistic growth rate of 27.41%. The addition of kitchen waste delayed the methanogenic time, promoted the transfer of carbon elements from solid phase to liquid phase to gas phase, and increased the growth and reproduction of methanogenic bacteria (Methansaeta) and their auxiliary bacteria (Longilinea, etc.).

Key words： excess sludge kitchen waste anaerobic fermentation carbon balance microbial analysis

Received: 28 July 2021

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X705

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	Articles by authors
	CHANG Cheng
	MING Lei-qiang
	MOU Yun-fei
	HUA Zhi-liang
	LI Xian-guo
	ZHANG Da-hai

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CHANG Cheng,MING Lei-qiang,MOU Yun-fei等. Synergistic effect of kitchen waste and sludge anaerobic fermentation for methane production[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(3): 1259-1266.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I3/1259

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