给水厂砂滤池反冲洗水直接回用对出厂水水质影响及其风险评价  

Impact of direct recycling of sand filter backwash water in a drinking water treatment plant:Long-term operational investigation and health risk assessment

作　　者：张锋 蒋才芳 刘敏 梁虹[3] 许谦 蒋菱 董慧峪 Ali Mashayekh-Salehi[1,2] 谢婷 刘绍刚 ZHANG Feng;JIANG Caifang;LIU Min;LIANG Hong;XU Qian;JIANG Ling;DONG Huiyu;Mashayekh-Salehi Ali;XIE Ting;LIU Shaogang(School Chemistry and Chemical Engineering GXMZU,State Key Laboratory of Forestry Chemistry and Engineering,State Ethnic Affairs Commission,Guangxi Key Laboratory of Forestry Chemistry and Engineering,Guangxi Collaborative Innovation Center of Forestry Chemistry and Engineering,Nanning 530008;Research Center for Eco-Environmental Science,Chinese Academy of Sciences,Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Science,Chinese Academy of Sciences,Beijing 100085;Guangxi Nanning Water Co LTD,Nanning 530031)

机构地区：[1]广西民族大学化学化工学院,林产化学与工程国家民委重点实验室,广西林产化学与工程重点实验室,广西林产化学与工程协同创新中心,南宁530008 [2]中国科学院生态环境研究中心,中国科学院饮用水科学与技术重点实验室,北京100085 [3]广西绿城水务股份有限公司,南宁530031

出　　处：《环境科学学报》2024年第5期128-137,共10页Acta Scientiae Circumstantiae

基　　金：中国博士后科学基金面上项目(No.2021M693326);国家自然科学基金(No.21976040);广西高等学校高水平创新团队及卓越学者资助计划(No.桂教人[2020]6号);广西研究生教育创新计划项目(No.YCBZ2023114);南宁市科学研究与技术开发计划(No.ZC20223238)。

摘　　要：给水厂的生产废水的回用安全性,备受水务行业关注.本研究以邕江原水和砂滤池反冲洗废水为对象,对某给水厂沿程各单元出水的一般性和毒理学水质指标进行长周期监测,例如浊度、UV_(254)、氨氮(NH_(4)^(+)-N)、高锰酸盐指数(COD_(Mn))、农药、抗生素等微污染物,探讨砂滤池反冲洗水直接回用对给水厂水质的影响.结果显示,给水厂砂滤池反冲洗水中浊度、氨氮、DOC和COD_(Mn)普遍高于原水,且冬季较高其他季节;UV_(254)、SO_(4)^(2-)、NO_(3)^(-)、Pb、Cu等指标与出厂水相差不大,反冲洗水直接回用对出厂水水质影响不大.各处理单元出水中检出33种农药和4种抗生素,其含量远低于《生活饮用水卫生标准》(GB 5749-2022)限值,但唑醚菌胺、磺胺二甲异嘧啶、诺氟沙星和环丙沙星稍高于原水.荧光光谱分析表明,各处理单元出水的溶解性有机质(DOM)的主要组分为类腐殖质物质和类蛋白质物质,水处理工艺对芳香蛋白类及溶解性微生物代谢产物有一定去除作用.砂滤池反冲洗水中富集较多铝(Al),浓度达到0.18 mg·L^(-1),回用时需加以关注.健康风险评价模型结果显示出厂水中残余铝的个人健康年风险最大值为5.34×10^(-7),低于最大可接受年风险水平10^(-6).The safety of recycling sand filtered backwash water(SFBW)of drinking water treatment plants has received increasing attention.The impacts of direct recycling of SFBW on finished water quality was investigated in the present work.Water quality parameters including turbidity,UV_(254),ammonia nitrogen(NH_(4)^(+)-N),permanganate index(COD_(Mn)),and micropollutants(pesticides and antibiotics)were measured through longterm monitoring during treatment processes.The results confirmed that SFBW recycling did not adversely affect finished water quality and followed the Standards for Drinking Water Quality in China(GB 5749-2022).During the treatment processes,33 types of pesticides and 4 kinds of antibiotics were detected,all fall in the standard limit 1.The application of fluorescence spectroscopy verified that the conventional water treatment processes could The safety of recycling sand filtered backwash water(SFBW)of drinking water treatment plants has received increasing attention.The impacts of direct recycling of SFBW on finished water quality was investigated in the present work.Water quality parameters including turbidity,UV254,ammonia nitrogen(NH_(4)^(+)-N),permanganate index(COD_(Mn)),and micropollutants(pesticides and antibiotics)were measured through longterm monitoring during treatment processes.The results confirmed that SFBW recycling did not adversely affect finished water quality and followed the Standards for Drinking Water Quality in China(GB 5749-2022).During the treatment processes,33 types of pesticides and 4 kinds of antibiotics were detected,all fall in the standard limit 1.The application of fluorescence spectroscopy verified that the conventional water treatment processes could effectively remove the dissolved organic matter(DOM),particularly targeting aromatic proteins and soluble microbial metabolites,from raw water by.The concentration of aluminum in SFBW exhibited a significant increase to 0.18 mg·L^(-1),alarming increased attention.Based on health risk assessments,the maximum individual annu

关 键 词：反冲洗水 废水回用 水质分析 长周期监测 健康风险评估 

分 类 号：X703[环境科学与工程—环境工程]