污水处理厂挥发性硫化物释放特征与风险评价

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Abstract Volatile sulfur compounds (VSCs) released by each treatment unit of urban sewage treatment plants were long-term monitored, and the sensory effects and health risks brought by VSCs were evaluated. The results showed that, from the point of view of concentration, VSCs were dominated by H₂S (the H₂S concentration during the monitoring period was N.D.~580μg/m³), and the concentration of methyl mercaptan (MT) accounts for the least (the concentration of MT during the monitoring period was N.D.~4.7μg/m³), and the concentration distribution of VSCs had obvious seasonality, that was, summer>autumn>winter. In terms of sensory, H₂S was the gas the contributes the most to the odor of all VSCs (the contribution rate was 79%~93%), except for secondary sedimentation. Outside the tank, it was a key malodorous gas in other processing units; although the MT concentration level was low, its contribution to odor cannot be ignored; the odor activity value (SOAV) of the mixed gas of the grid and the grit tank were 2591.9, 5494.8, the pretreatment unit contributed the most to the smell of the plant. In terms of health risks, there was a non-carcinogenic risk of H₂S in the grille and grit tank in spring and summer.

Key words： municipal wastewater treatment plants malodorous gases VSCs sensory evaluation health evaluation

Received: 28 April 2021

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X512

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	Articles by authors
	ZHAO Ru-han
	YANG Qing
	PENG Zhao-xu
	XU Zong-ze
	DONG Yu-fan
	LI Yuan-jin

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ZHAO Ru-han,YANG Qing,PENG Zhao-xu等. Release characteristics and risk evaluation of VSCs in municipal wastewater treatment plants[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(12): 5570-5577.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I12/5570

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