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近年来,随着高层建筑物的兴建,二次供水设施大量出现。为了解二次供水卫生状况,我们对石家庄市宾馆、饭店二十个单位二次供水的部分理化指标,居民二次供水细菌指标进行了调查。 以水泥蓄水池二次供水做调查水样,蓄水池入口末梢水做对照水样,对游离余氯、总碱度、氨氮、亚硝酸盐氮、硝酸盐氮、化学耗氧量、铅、砷八项指标进行了配对调查。采样时间为1991年5～6月。
In recent years, with the construction of high-rise buildings, a large number of secondary water supply facilities appear. In order to understand the secondary water supply sanitation, we investigated some physical and chemical indexes of secondary water supply of twenty units of hotels and restaurants in Shijiazhuang City and the secondary indicators of water supply for residents. Water samples were taken from the secondary water supply of cement reservoirs and the control water samples were taken from the peripheral water at the inlet of the reservoir. The contents of free residual chlorine, total alkalinity, ammonia nitrogen, nitrite nitrogen, nitrate nitrogen, chemical oxygen demand, , Arsenic eight indicators were paired survey. Sampling time is from May to June 1991.