合肥市二次供水卫生10年监测结果与分析

Decade Supervision Survey and Analysis of Quadratic Water Supply in Hefei

为了探讨二次供水卫生的科学管理方法 ,对合肥市 10年来的监督监测资料进行分析。结果发现 ,夏季水质合格率明显低于其他季节 (P <0 .0 5 ) ,高位水箱的游离性余氯合格率只有 5 5 .5 % ,显著低于地下蓄水池的合格率 (85 .7% ,P <0 .0 0 5 ) ;使用持续性消毒器对余氯维持一定时间的消毒效果确实有效 (P <0 .0 5 ) ,但使用不当有可能产生较多的氯化副产物 ;专业清洗消毒队的消毒效果明显好于单位自行消毒 (P <0 .0 5 )。提示应加强蓄水池的卫生防护和各类供水设施的消毒 ,尤其是夏季饮用水的消毒工作 ,要掌握持续消毒器科学的使用方法。条件许可时 ,应逐步淘汰二次供水设施。

In order to study scientific administrative methods in quadratic water supply, Data of decade supervision survey in Hefei were analyzed. The results showed that the qualified rate in summer was lower than that in other seasons (P<0.05). The qualified rate (55.5%) of dissociated surplus chlorine in the water tanks was lower than that (85.7%) of the underground sluice pool (P<0.005). The durative disinfectant implement was indeed efficient to maintain certain temporal disinfectant effect (P<0.05), but improper use can produce more by-products related to chlorine. The disinfectant effect made by the specialized cleaning team was better than that made by the units (P<0.05). The results indicated that the sluice pool sanitary defense and all kinds of water supply facilities disinfection should be strengthened, especially in summer. There is need to use durative disinfectant implement rationally. The quadratic water supply should be died out when the conditions permitted.