Effect of combined disinfection using ultraviolet and tea polyphenols in network
LIU Xuan-qi1, FENG Cui-min1, WANG Chang-zheng1, WANG Jun-ling1, SUN Jing-yi2
1. Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Beijing General Municipal Engineering Design & Research Institute Co., Ltd., Beijing 100044, China
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.
刘炫圻, 冯萃敏, 汪长征, 王俊岭, 孙婧宜. 紫外线-茶多酚联用对供水管网的消毒效果[J]. 中国环境科学, 2020, 40(4): 1563-1569.
LIU Xuan-qi, FENG Cui-min, WANG Chang-zheng, WANG Jun-ling, SUN Jing-yi. Effect of combined disinfection using ultraviolet and tea polyphenols in network. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(4): 1563-1569.
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