金属膜过滤工艺保障不同管材供水管网水质生物稳定性的研究  

Guarantee of Biological Stability in Drinking Water Distribution System of Different Pipe Materials by Metallic Membrane Filtration Process

作　　者：朱海龙 刘唯源 邓博苑 张雅梅 董志强 李伟英[1,3] ZHU Hailong;LIU Weiyuan;DENG Boyuan;ZHANG Yamei;DONG Zhiqiang;LI Weiying(College of Environmental Science and Engineering,Tongji University,200092;Municipal Environmental Protection Engineering Co.,Ltd of CERC Shanghai Group,201906;Key Laboratory of Yangtze River Water Environment,Ministry of Education,Tongji University,200092:Shanghai,China)

机构地区：[1]同济大学环境科学与工程学院,200092 [2]中铁上海工程局集团市政环保工程有限公司,201906 [3]同济大学长江水环境教育部重点实验室,上海200092

出　　处：《水处理技术》2024年第5期86-91,共6页Technology of Water Treatment

基　　金：国家“十四五”重点研发计划项目(2021YFC3201304);福州市供水系统水质稳定特性及对策研究(kh0040020203000);成都川力高品质饮用水水质安全与保障技术研究(kh0040020182078)

摘　　要：供水管网末梢水水质生物安全问题受到了广泛关注。采用生物膜环状反应器(BAR)模拟实际供水管网,探究了自来水和金属膜滤后水(膜滤水)对5种管材管壁生物膜影响的异同性。结果表明,金属膜过滤工艺对水中浑浊度、溶解性有机碳的平均去除率分别为93.4%、19.0%;5种管材管壁生物膜在生长稳定期的生物量排序为铜<不锈钢≈聚氯乙烯(PVC)≈高密度聚乙烯(HDPE)<球墨铸铁;自来水体系中反应器进出水平均浑浊度分别为1.52、3.44 NTU,而膜滤水体系反应器进出水平均浑浊度分别为0.10、0.42 NTU,且各管材管壁生物膜生长缓慢。这是因为膜滤水体系微生物群落物种丰富度较低,管壁生物膜样品的OTU数减少了39.7%~56.5%,耐氯致病菌(分枝杆菌、甲基杆菌等)相对丰度明显减少。因此,金属膜过滤工艺可有效保障供水管网饮用水水质生物稳定性。The biological safety of tap water in drinking water distribution system has received extensive attention.We used a biofilm annular reactor(BAR) to simulate a real water supply network and investigated the differences between the effects of tap water and the water filtered by metallic membrane(the filtered water) on the biofilm of five kinds of pipe materials.The results showed that the average removal rates of turbidity and dissolved organic carbon from water by metallic membrane filtration process were 93.4% and 19.0%,respectively.During the stable period of microbial growth,the order of biomass of biofilm on five kinds of pipe materials was copper < stainless steel ≈PVC≈HDPE< ductile iron.The average turbidity of inlet and outlet of the reactor in the tap water system was 1.52,3.44 NTU,respectively.The average turbidity of inlet and outlet of the reactor in the filtered water system was 0.10,0.42 NTU,respectively,and the biofilm of the filtered water system grew slowly.This was due to the low species richness,and the OTUs of biofilm samples was decreased by 39.7%~56.5% in the filtered water system.Similarly,in the filtered water system,the relative abundance of chlorine-resistant pathogens(Mycobacterium,Methylobacterium,etc.) was significantly reduced.Therefore,the metallic membrane filtration process can effectively guarantee the biological stability of drinking water in drinking water distribution system.

关 键 词：金属膜 生物膜环状反应器 供水管材 生物稳定性 分子生物学 

分 类 号：TU991[建筑科学—市政工程]