紫外线-茶多酚联用对供水管网的消毒效果

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Abstract

To reduce the security risks of traditional ultraviolet (UV) disinfection technology alone, tea polyphenols (TP) was used in conjunction with UV disinfection. The effects of UV-TP combined disinfection and the changes of biofilm and bacterial community structure were investigated using a simulated water supply network composing different pipe materials and hydraulic retention times. The results showed that 75mg/L was a better dosage of tea polyphenols when combined with UV disinfection,which can maintain the disinfection effect for 48hours. The quality of treated water remained better in the testing process of the simulated system, but the pipe material had a greater impact on the disinfection effect of the pipe network. The frequency of bacteria exceeding 100CFU/mL in the ductile iron (DI) and unplasticized polyvinyl chloride (UPVC) pipe network within 30days were 80% and 0%, respectively. UV-TP combined disinfection in the UPVC pipe network has a relatively strong disinfection.Compared with UV disinfection alone, UV-TP combined disinfection resulted in a reduced rate of biofilm build up and is more effective in inactivation of Cyanobacteria and intestinal pathogens, which is beneficial to ensure the required quality of the water supply network.

Key words： ultraviolet tea polyphenols combined disinfection water supply network water safety

Received: 04 September 2019

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X703

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	Articles by authors
	LIU Xuan-qi
	FENG Cui-min
	WANG Chang-zheng
	WANG Jun-ling
	SUN Jing-yi

Cite this article:

LIU Xuan-qi,FENG Cui-min,WANG Chang-zheng等. Effect of combined disinfection using ultraviolet and tea polyphenols in network[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(4): 1563-1569.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I4/1563

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