间歇通风对污泥好氧堆肥过程中腐殖质电子转移能力的影响

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Abstract Two aeration strategies (continuous ventilation, intermittent ventilation) were used for sewage-sludge composting to investigate temporal changes in spectrum features and iron-reducing capability of fulvic acid (FA) and humic acid (HA) during the composting process. The results showed that, compared with continuous ventilation, the intermittent ventilation enhanced the electron transfer capacity (ETC) of humic substances by promoting the decomposition of proteinoid component and the formation of humic- like components. After intermittent-aeration composting, the NRC and CRC increased for FA by 194.33 and 127.97μmol e^-/(g C), respectively, and for HA by 168.26 and 203.81μmol e^-/(g C), respectively. The PCA and correlation analysis demonstrate that C3 and C4 were the key factors controlling the ETC of FA, while SUVA₂₅₄ and SUVA₂₈₀ were the key factors determining the ETC of HA.

Key words： sewage sludge aerobic composting humic substances electron transfer capacity intermittent aeration

Received: 04 October 2022

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X705

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	MO Jin-tao
	LI Jun
	LU Yi-ming
	ZHANG Jun
	XI Bei-dou

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MO Jin-tao,LI Jun,LU Yi-ming等. Effects of intermittent aeration on the electron transfer capacity of humic substances in aerobic composting of sewage sludge[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(5): 2393-2403.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I5/2393

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