建筑供水系统典型条件致病菌存在水平及影响因素  

Existing Level and Influencing Factors of Typical Opportunistic Pathogens in Building Water Supply System

作　　者：盛东方 李伟英[1] 李悦 黄圣洁 秦升益 SHENG Dongfang;LI Weiying;LI Yue;HUANG Shengjie;QIN Shengyi(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Rechsand Science and Technology Group,Beijing 100085,China)

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]北京仁创科技集团有限公司,北京100085

出　　处：《净水技术》2019年第12期46-54,共9页Water Purification Technology

基　　金：国家自然科学基金(51979194);中国工程院院地合作项目重庆市饮用水源污染防治与饮水安全保障措施发展战略研究(2019-CQ-ZD-1)

摘　　要：建筑供水系统的功能是对市政供水管网水进行存储、加压并输送至水龙头处,其具有余氯量低、水温较稳定、水流停留时间长等特点,为微生物提供了适宜的生长环境。相较于出厂水与市政管网水,龙头水中的菌落总数及条件致病菌浓度均呈上升趋势,其中,典型的条件致病菌(如军团菌和铜绿假单胞菌)因具有耐热、耐含氯消毒剂等特性,易在建筑供水系统中再生长与繁殖,致使龙头水微生物污染风险加剧,威胁人类健康。基于国内外研究成果,文中阐述建筑供水系统中的微生物污染状况,探讨军团菌、铜绿假单胞菌的存在水平与主要影响因素,提出通过定期清洗与加强维护来降低建筑供水系统微生物污染风险,保障龙头水水质安全。The function of building water supply system(BWSS)is to storage,pump and transport the water from distribution water supply system(DWSS).Due to the feature of low chorine residual concentration,appropriate temperature and long residence time,an appropriate condition is provided for bacterial regrowth.Comparing with finished water and water in the DWSS,microbial numbers in tap water increase.Among microorganisms,typical opportunistic pathogens have capabilities of heat and chlorine resistances,so they are easy to regrow and colonize in the BWSS.Microbial contamination risk of tap water is higher,and it brings potential risk to human being.The paper summarizes research all over the world,expounds microbial contamination status in the BWSS,discusses existing levels and factors of Legionella and Pseudomonas aeruginosa,put forwards that timely clean and maintenance can reduce microbial contamination risk.

关 键 词：建筑供水系统 条件致病菌 军团菌 铜绿假单胞菌 

分 类 号：TU991.33[建筑科学—市政工程]