社区化粪池污水能量转化估算与分析研究

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Abstract Taking the septic tank as the research object, based on reaction processes of anaerobic digestion model No.1, this paper established the unit model for calculation of water-energy-emission nexus in urban complex system-community septic tank (WeMax-STK), and analyzed the occurrence, conversion as well as the destination of sewage embodied energy, and evaluated the recovery potential of energy. The research results showed that the WeMax-STK model was generally reliable, the average error between the simulated value and the monitored value didn’t exceed 24%, the uncertainty was less than 18%, and the accuracy was more than 70%. The percentage of organic matters which conversed into thermal energy and internal microbial energy was about 17% of the total chemical energy in septic tank influent. Most sewage embodied chemical energy was transformed into slow degradation substrate, and the energy converted from organic matter into gaseous methane in the septic tank only accounts for about 4% of the total amount of chemical energy in the influent. The thermal energy recovery intensity was about 4.6kWh/m³, and the recovery potential was 24% to 25%, which was about 3 to 6 times that of chemical energy.

Key words： septic tank sewage embodied energy energy conversion anaerobic digestion model No.1

Received: 09 May 2022

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X703

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	Articles by authors
	YAN Yi-jun
	WANG Chun-yan
	LIU Yi
	DONG Xin
	LIU Yan-chen
	YAO Lin-jie

Cite this article:

YAN Yi-jun,WANG Chun-yan,LIU Yi等. Estimation and analysis of embodied energy conversion in community septic tank[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(1): 143-152.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I1/143

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