南方某城市供水管网红水原因调查与研究  

Research on the Reasons of Red Water in a Southern City in China

作　　者：赵乐乐[1] 李星[1] 杨艳玲[1] 黄静[1] 陈伟雄[2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]广东省建筑设计研究院,广州510010

出　　处：《环境科学》2011年第11期3235-3239,共5页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07421-002;2008ZX07422-005)

摘　　要：针对南方某城市供水管网经常出现红水现象,对实际供水管网进行了调查.从某城市供水管网中连续取样检测溶解氧、余氯、铁浓度、锰浓度、铁细菌和亚硝酸菌等重要水质指标,目的是探讨管网出现红水的原因.结果表明,管网出现红水地区的沉淀物主要成分为铁、锰,出厂水存在锰超标现象(Mn最大值达到0.33 mg.L-1),4个水厂出厂水拉森指数均>1,4个水厂供水量及硫酸盐、电导率等供水水质指标存在较大的差别,管网中铁细菌及亚硝酸菌(100～103MPN.mL-1)存在水平较高.因此,出厂水本身腐蚀性是导致管网出现红水的潜在原因;其次,各水厂供水量和水质差异导致管网水在低溶解氧及低余氯条件下易发生红水现象;再者,管网中硝化作用严重,诱发微生物腐蚀供水管道.为此,针对上述原因提出控制管网红水现象的主要措施.The red water in the drinking distribution systems of a southern city was investigated by analyzing the water quality,such as DO,residual chlorine,iron,manganese,iron bacteria and ammonia-oxidizing bacteria.The objectives of this study were to identify the reasons of red water with the aim to supply the answer to this problem.The results showed that the main compositions of the deposits were iron and manganese.There were manganese overstep（the maximum of Mn could reach to 0.33 mg·L-1） in the plant effluent with Larson ratios1 and the significant difference in water quantity,sulfate and electrical conductivity among the four plants.The density of the iron bacteria and ammonia-oxidizing bacteria（100-103 MPN·mL-1） was high.The potential reason for the red water was the water corrosion of plant effluent.Secondly,the red water easily occurred in the distribution systems with lower DO and residual chlorine.In addition,serious nitrification caused microbiological corrosion was another vital reason.According to the research,the primary methods for controlling red water were proposed.

关 键 词：红水 铁细菌 腐蚀 铁释放 硝化作用 饮用水配水管网 

分 类 号：X131.2[环境科学与工程—环境科学] TU993.6[建筑科学—市政工程]