翻堆对好氧堆肥腐殖质电子转移能力的影响

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Abstract This study focus investigated the effects of two typical kinds of ventilation strategies (continuous aeration, turning) on the formation and electron transfer capacities (ETCs) of fulvic acid (FA) and humic acid (HA) during sewage-sludge composting by analyzing the temporal variation of spectrum features and the native/chemical reducing capability (NRC/CRC) of these two humic substances. The results showed that:compared with the turning, continuous ventilation promoted the reduction of protein-like fractions and the increase of humic-like fractions in FA and HA during the whole composting, enhanced ETCs of FA during the thermophilic and maturity phases (CRC increased 176.55μmol e-/gC, 123.24μmol e-/gC), but reduced ETCs of HA and FA during the heating phase (CRC decreased 246.47μmol e-/gC, 116.13μmol e-/gC). According to the results from the correlation analysis, the most important variables in influencing ETCs of humic substances were pH, SUVA₂₅₄, SUVA₂₉₀, and protein-like fraction; meanwhile, the turning improved the effect of humus-like fractions on the ETCs of the humic substances.

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

Received: 05 May 2022

PACS:

X705

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	Articles by authors
	LU Yi-ming
	LI Jun
	DAI Yu
	MO Jin-tao
	ZHANG Jun
	XI Bei-dou

Cite this article:

LU Yi-ming,LI Jun,DAI Yu等. Effects of turning on the electron transfer capacity of humic substances in aerobic composting[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(12): 5748-5757.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I12/5748

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