上海市闵行区住宅小区管道分质供水卫生状况调查

[目的]了解上海市闵行区管道分质供水的卫生状况,为进一步开展有效监管提供科学依据。[方法]利用统一的调查表,对全区23个管道分质供水小区进行调查,并采集原水、出水、回水、用户水水样分别进行水质检验。[结果]23个管道分质供水小区中,采用反渗透、纳滤和超滤水处理设备的分别占4.3%、65.2%、30.4%,水质消毒均使用臭氧,69.6%的管网消毒使用臭氧;23个小区均开展水质自检,自检频率为每周1次至每月1次;管道分质供水出水耗氧量指标比原水显著下降（P〈0.01）,用户水细菌总数比出水显著上升（P〈0.05）,循环回水设计不足对水质微生物指标有明显影响（P〈0.01）。[结论]管道分质供水水质明显好于市政自来水,但输送过程中水质下降,循环管网设计对水质微生物指标有明显影响。

Investigation on Hygienic Situation of Fine Drinking Water Supply in Minhang Discrict, Shanghai

[ Objective] In order to check the hygienic situation of fine drinking water supply in Minhang District and to provide scientific bases for relevent agencies to setting standards for regulation and inspection, this survey was conducted. [Methods] Survey on the 23 communities set fine drinking water supply with uniformed form were conducted. Raw water, product water, circulating water and in-house terminal water samples were collected from these communities.[ Results] Reverse osmosis, nano-filtration and ultra-filtration equipments used to treat water accounted for 4.3%, 65.2% and 30.4%, respectively. All of the communities used ozone to disinfect the fine drinking water, and 69.6% of them used ozone to disinfect pipe systems. The communities all conducted self water quality monitoring, one to four times per month. The value of the COD of the product water was significantly decreased than that of the raw water. The TBC of the in-house terminal water was significantly increased than that of the product water. The design defect in circulating pipe system could lead to the bacteria growth in fine drinking water supply.[ Conclusion] The quality of the fine drinking water produced is better than that of the general tap water, but it goes worse during transportation. The design defect of the circulating pipe system significantly influences the bacteria growth in the fine drinking water supply.