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 annual health risk value for aluminum in the finished water is 5.34×10^(-7),which falls below the maximum acceptable annual risk level of 10^(-6).
作者
张锋
蒋才芳
刘敏
梁虹
许谦
蒋菱
董慧峪
Ali Mashayekh-Salehi
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)
出处
《环境科学学报》
CAS
CSCD
北大核心
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)。
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
sand filter backwash water
recycling of waste water
water quality analysis
long-term monitoring
health risk assessment
作者简介
张锋(1998-),男,E-mail:zh20201001@163.com;谢婷,E-mail:ting_xie@outlook.com;刘绍刚,E-mail:liushaogang2005@163.com。
