摘要
消毒剂的储存条件、运行工况和投加方案对消毒效果的影响极大,如控制不当则出厂水可能出现病原微生物及消毒副产物浓度偏高等问题,给饮用水安全造成威胁。针对串并联复合清水池在消毒过程中出现的此类问题,通过构建1∶50全幅清水池中试模型,开展不同条件下的消毒试验。结果表明,当次氯酸钠消毒剂有效氯含量为5%时,采用前端和中间同时投加的两点投加方案,保持消毒剂水力停留时间(HRT)在45 min以上且原水腐殖酸(HA)浓度低于5 mg/L的条件下,既能保障不同工况出口处的出水水质,还能保持较低的氯耗量,因此可将其确定为该清水池的最佳消毒方案。
Disinfectants exert a significant influence on disinfection efficacy under varying storage conditions,operational conditions,and dosing strategies.Consequently,the treated water of the waterworks may exhibit elevated levels of pathogenic microorganisms and disinfection by-products,which pose potential risks to drinking water safety.In response to the challenges encountered during the disinfection process of serial-parallel composite clear water reservoir,a full-scale clear water reservoir with 1∶50 scale was developed to carry out disinfection experiments under various conditions.When the effective chlorine content of sodium hypochlorite disinfectant was 5%,a two-stage dosing strategy involving simultaneous addition at both the inlet and mid-section of the system was implemented.Provided that the hydraulic retention time(HRT)of the disinfectant remained above 45 minutes and the humic acid(HA)concentration in the raw water was below 5 mg/L,this method not only ensured treated water quality across various operational conditions but also maintained relatively low chlorine consumption.Therefore,it can be considered the optimal disinfection strategy for the clear water tank.
作者
陶阳
范功端
魏忠庆
陈永福
郑奋
徐开钦
TAO Yang;FAN Gong-duan;WEI Zhong-qing;CHEN Yong-fu;ZHENG Fen;XU Kai-qin(College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;Fuzhou Municipal Water Supply Co.Ltd.,Fuzhou 350001,China)
出处
《中国给水排水》
北大核心
2025年第15期55-60,共6页
China Water & Wastewater
基金
福建省住房和城乡建设系统科学技术项目(2022-K-2)
国家自然科学基金资助项目(51778146)。
关键词
串并联复合清水池
消毒效果
次氯酸钠
两点投加
氯耗量
series-parallel composite clear water reservoir
disinfection effect
sodium hypochlorite
two point dosing
chlorine consumption
