南方某常规工艺水厂应对原水低2-MIB的工艺优化  

Process Optimization for a Conventional Water Treatment Plant in Southern China to Address Low Levels of 2-MIB in Raw Water

作　　者：郭晓鸣 谢耀华 黄慧 刘奋强 GUO Xiao-ming;XIE Yao-hua;HUANG Hui;LIU Fen-qiang(Shenzhen Longhua Water Co.Ltd.,Shenzhen 518000,China)

机构地区：[1]深圳市深水龙华水务有限公司,广东深圳518000

出　　处：《中国给水排水》2025年第3期22-27,共6页China Water & Wastewater

摘　　要：为了应对《生活饮用水卫生标准》(GB 5749—2022)对2-甲基异莰醇(2-MIB)限值的新要求,针对原水低浓度2-MIB(10~25 ng/L)的去除问题,在南方某常规工艺水厂开展了生产性试验,考察了前加氯、粉末活性炭单独投加以及与高锰酸钾联用的去除效果和经济性。结果表明,前加氯会造成出厂水中2-MIB浓度升高,而在原水泵站投加粉末活性炭的效果优于在反应池内投加。更重要的是,粉末活性炭与高锰酸钾联用不仅能达到与单独粉末活性炭相当的去除效果,而且成本更低。研究证实,在常规工艺水厂中,采用在原水泵站投加粉末活性炭与厂内投加高锰酸钾的方法,能够有效去除原水中低浓度的2-MIB,确保出厂水水质符合新的国家标准。To address the new requirements for the limit of 2-MIB in the Standards for Drinking Water Quality(GB 5749-2022),a production-scale experiment was conducted at a conventional water treatment plant in southern China to tackle the removal of low concentrations of 2-MIB(10-25 ng/L)in the raw water.The study employed different treatment methods,including pre-chlorination,the separate addition of powdered activated carbon(PAC),and its combined application with potassium permanganate,to evaluate their removal efficiency and cost-effectiveness.The results indicated that pre-chlorination led to an increase in the concentration of 2-MIB in the finished water,whereas the addition of PAC at the raw water pump station was more effective than adding it in the reaction tank.More significantly,the combination of PAC with potassium permanganate not only achieved the same removal effect as PAC alone,but also had a lower cost.The research confirms that the strategy of adding PAC at the pump station in conjunction with potassium permanganate within the plant can effectively remove low concentration of 2-MIB in the raw water,ensuring that the finished water meets the new standards.

关 键 词：2-甲基异莰醇 常规工艺 前加氯 粉末活性炭 高锰酸钾 

分 类 号：TU991[建筑科学—市政工程]