摘要
随着人民生活水平的提升,居民对饮用水质的品质要求亦愈来愈高。作为城市供水“最后一公里”的二次供水系统,其水质安全与消费者健康息息相关。对某居民小区(A小区)二次供水改造前后的水质进行了对比试验研究,基于供水管网、二次供水、改造小区各环节设置采样点,对小区改造前后共计22个月的数据进行分析,为后续二次供水改造提出技术指导和建议。结果表明二次供水的水质安全风险点主要是微生物安全风险,通过对二次供水泵房、楼宇管道、街坊管道的改造,二次供水水质得到了明显改善,供水末梢采样点水中的浑浊度、异养菌菌落总数(HPC)均值由改造前的0.267 NTU、125 CFU/mL分别降至0.202 NTU、85 CFU/mL,余氯均值由0.421 mg/L上升到0.470 mg/L,供水水质的微生物安全风险得到有效控制。
With the improvement of people’s quality of life,residents’requirements for drinking water quality are also getting higher and higher.Through the water quality survey of samples from water distribution systems,secondary water supply systems and renovation unit for 22 months,this study identified the safety risk in water supply water quality mainly existed in the secondary water supply,and the water quality safety risk in the secondary water supply is mainly the microbial safety risk,and this risk can be reduced through the optimization of the water supply material.Aim at improving the water quality,this paper carried out a renovation project in Community A to renovate its secondary water supply facilities like pump houses,building pipelines and neighborhood pipelines.After the renovation,the average turbidity,and the average total number of heterotrophic bacteria colonies in the water samples of water supply terminals decreased from 0.267 NTU and 125 CFU/mL to 0.202 NTU and 85 CFU/mL,respectively,and the average residual chlorine concentration increased from 0.421 mg/L to 0.470 mg/L.The proportion of turbidity increase and the proportion of residual chlorine attenuation in the secondary water supply stage decreased significantly compared with before the renovation.Thus,the biological safety risk of the water supply water quality in Community A was effectively controlled.
作者
王雪峰
李辰晨
张骏鹏
WANG Xuefeng;LI Chenchen;ZHANG Junpeng(Shanghai Pudong Veolia Water Co.,Ltd.,Shanghai 200120,China)
出处
《给水排水》
CSCD
北大核心
2022年第S01期931-935,941,共6页
Water & Wastewater Engineering
关键词
供水水质
二次供水改造
微生物风险
效果评估
Water quality
Secondary water supply renovation
Biological safety risk
Effect evaluation
