| 南方某城市供水管网红水原因调查与研究 |
| 摘要点击 3249 全文点击 2820 投稿时间：2010-12-14 修订日期：2011-03-14 |
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| 中文关键词 红水 铁细菌 腐蚀 铁释放 硝化作用 饮用水配水管网 |
| 英文关键词 red water iron bacteria corrosion iron release nitrification drinking distribution systems |
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| 中文摘要 |
| 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 ～103 MPN·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. |
| 英文摘要 |
| 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 ratios>1 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. |
