生物炭对污泥热解液与牛粪共厌氧发酵的影响

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Abstract 4 biochars obtained from Phragmites australis and Sporobolus alterniflora were added to the anaerobic co-digestion system of SSPL and cow dung matrix. Batch experiment revealed that biochar addition brought forward the peak day of daily methane yield by 4~8 days and increased the cumulative methane yield by 78.8%~157.2% compared with the controlled group without biochar addition. The promoting effects of the biochars were inversely correlated with the inorganic contents in their raw materials. Biochar addition weakened the microbial bioavailability of SSPL in the liquid by adsorbing its toxic compounds, providing supports and trace elements for microbials, and promoting the interspecific electrical transmission of microbials. The higher the inorganic contents in biochar raw materials, the worse the adsorption performances on SSPL of biochars, which resulted in the higher the organic contents in residues after anaerobic digestion. Biochar raw materials containing alkaline earth metals had better promoting effects on anaerobic digestion than alkali metals when their inorganic contents were similar.

Key words： biochar sewage sludge pyrolysis liquid anaerobic digestion inorganics

Received: 09 August 2021

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X705

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	YUE Xia
	CHEN De-zhen
	AN Qing
	QIN Pei

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YUE Xia,CHEN De-zhen,AN Qing等. Biochars enhancing anaerobic co-digestion of sewage sludge pyrolysis liquid and cow dung: influences of inorganics in biochar raw materials[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(3): 1267-1277.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I3/1267

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