慢滤对污水厂二级出水中条件致病菌的去除

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Abstract This study investigated the removal of Pseudomonas aeruginosa in secondary effluent from sewage plants, as well as the related mechanism. Different slow filtration parameters influence on Pseudomonas aeruginosa removal such as filtration velocity, carbon nitrogen ratio, ion concentration and pH were examined. The results showed that 87.0% removal of Pseudomonas aeruginosa could be obtained under the optimizing condition with 5cm/h of filtration velocity, 10:1of C/N, 60mg/L of Ca²⁺ at pH7. And the biofilm on the filter surface had the highest diversity and the most uniform of the species composition under this condition, Anaplasma spp. and Nitrospira spp. accounted for the largest proportion of the relative abundance of microorganisms with removal effect on Pseudomonas aeruginosa. Mechanism study revealed that the deposition of pollutants on the biofilm surface of the filter was mainly attributed to the adhesion of extracellular polymers under 5cm/h of filtration velocity, 10:1of C/N, while the adhesion of microorganisms contributed for the deposition of pollutants under 60mg/L of Ca²⁺ at pH 7.

Key words： slow filtration Pseudomonas aeruginosa secondary effluent operating conditions deposition process

Received: 31 December 2022

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X703

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	SUN Li-hua
	WANG Chun-fang
	ZHU Jun-yao
	DENG Si

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SUN Li-hua,WANG Chun-fang,ZHU Jun-yao等. Removal of opportunistic pathogens in secondary effluent from sewage plants by slow filtration[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(8): 3946-3955.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I8/3946

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