污泥典型处理处置过程对矿物油的削减研究——以北京城市生活污泥“热水解+高级厌氧消化+板框脱水+土地利用”为例

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Abstract Mineral oil concentration in sludge samples collected from each units of the sludge "thermal hydrolysis + anaerobic digestion + plate frame dehydration" treatment process in a wastewater treatment plant in Beijing was measured, the mass flow of mineral oil in the sludge treatment process was calculated, and the planting experiment was conducted to detect the absorption and reduction of mineral oil in the soil-plant system. The sludge from this wastewater treatment plant contained high concentration of mineral oil, and the treatment process of "thermal hydrolysis + anaerobic digestion + plate frame dehydration" had poor effect on reducing mineral oil. The concentration of mineral oil in the sludge cake was 4533.8~10385.9mg/kg and the soil-plant system had obvious effect on removing mineral oil from soil with an average reduction of 84.1%. However, mineral oil mainly accumulated in the valuable parts such as ryegrass leaves and sunflower flowers. Therefore, it is necessary to further study the ecological security of mineral oil in the land utilization and disposal process of sludge.

Key words： municipal sludge mineral oil thermal hydrolysis anaerobic digestion forestland utilization

Received: 18 January 2023

PACS:

X705

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	Articles by authors
	ZHANG Yu-hui
	ZHU Fen-fen
	CHEN Qian
	ZHAO Bing
	WANG Huan
	ZHOU Tian-tian
	WANG Yi-yu
	WANG Jia-wei
	FU Xing-min

Cite this article:

ZHANG Yu-hui,ZHU Fen-fen,CHEN Qian等. Reduction of mineral oil in typical sludge treatment and disposal process-Taking the “thermal hydrolysis + advanced anaerobic digestion + plate frame dehydration + land utilization” treatment and disposal system of municipal sludge in Beijing as an example[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(8): 4057-4064.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I8/4057

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