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目的了解海淀区中小学管道直饮水的卫生质量,探讨管道直饮水与管网末梢水的优劣情况。方法采用随机采样方法,监测30份管道直饮水与管网末梢水配对样本。结果直饮水与末梢水比较,浑浊度、p H值、耗氧量、总硬度、硫酸盐、氯化物、硝酸盐氮指标显著降低,且耗氧量、总硬度、氯化物、硝酸盐氮4项指标差异有统计学意义(P<0.05)。直饮水较末梢水菌落总数增多。结论直饮水设备能起到一定的净化效果,但是经直饮水设备处理后的直饮水菌落总数超标,说明直饮水设备处理过程存在二次污染问题。应规范直饮水卫生范标准,加强直饮水管理和监测,保障学校师生饮用水的安全。
Objective To understand the hygienic quality of primary drinking water in primary and middle schools in Haidian District, and to discuss the advantages and disadvantages of direct drinking water in pipelines and peripheral water in pipe networks. Methods A random sampling method was used to monitor 30 pairs of direct drinking water and pipe network water samples. Results Compared with peripheral water, turbidity, p H value, oxygen consumption, total hardness, sulfate, chloride and nitrate nitrogen were significantly decreased in direct drinking water and peripheral water, and oxygen consumption, total hardness, chloride, There was significant difference between the indexes (P <0.05). Direct drinking water more than the total number of water-based colonies increased. Conclusion Direct drinking water equipment can play a certain purification effect, but the total number of direct drinking water colony after treatment by direct drinking water equipment exceeded the standard, indicating that secondary drinking water treatment equipment there are secondary pollution problems. Should regulate the standard straight drinking water health standards, to strengthen direct drinking water management and monitoring, to protect the safety of school teachers and students drinking water.