净水技术2025，Vol.44Issue(4)：71-80,10.DOI:10.15890/j.cnki.jsjs.2025.04.009
北方某市不同水源及工艺给水系统微生物处理效果比较
Comparison of Microbes Removal Efficacy of Different Water Treatment Process Systems and Different Water Sources in a Northern City
摘要
Abstract
[Objective]With the continuous improvement of China's drinking water quality standards,the requirements for microbial safety and risk control in water supply have become increasingly stringent.However,there are limited studies on the microbial removal efficiency of individual units in water treatment processes.Comparing the microbial removal effects of different units can help water plants optimize their process parameters based on actual conditions.[Methods]This study selected one water treatment plants(WTPs)that used groundwater as its source of water and two WTPs with different treatment processes that used surface water as its source of water in a northern City.Water samples were collected from all process units across four seasons,as well as from distribution networks at varying distances from these plants.Five indices were detected,including heterotrophic plate count,total coliform,Escherichia coli(E.coli),Enterococcus and Legionella pneumophila,alongside turbidity and dissolved organic carbon(DOC).The study evaluated the roles of conventional and advanced treatment processes in ensuring microbial safety and compared the removal efficiencies of specific microorganisms across process units.[Results]The study found that externally transferred water sources showed higher detection rates of total coliforms and E.coli than that in the other two WTPs,and 100%removal could be achieved by the main ohlorination process through each treatment unit.Contact time in pre-oxidation processes directly affected microbial removal efficiency.Enterococcus was detected in sand filter backwash water,suggesting it should be included as an enhanced monitoring indicator.Ultrafiltration ensured stable removal of total bacterial count despite fluctuations in raw water quality.[Conclusion]All treatment units effectively reduced microbial risks.It is recommended to strengthen free chlorine monitoring at pipe network endpoints and adjust primary chlorination dosages during high-temperature seasons.关键词
微生物安全性/净水工艺/供水管网(DWDS)/氯消毒/超滤Key words
microbial safety/water purification process/drinking water distribution system(DWDS)/chlorine disinfection/ultrafiltration(UF)分类
土木建筑引用本文复制引用
许皓,赵蓓,汪洋,李相宜,蔡佳男,杨杨,李玉仙..北方某市不同水源及工艺给水系统微生物处理效果比较[J].净水技术,2025,44(4):71-80,10.基金项目
中国科学院饮用水科学与技术重点实验室开放基金课题(21K01KLDWST) （21K01KLDWST）
