论文部分内容阅读
为掌握增城市农村生活饮用水的卫生现状,分别于2012年枯水期(3—4月)和丰水期(7—8月)对该市全部20个农村饮用水安全工程的出厂水、末梢水进行检测和评价。结果显示,采用完全处理工艺的水厂有10间(占50%);其余10间水厂属小型集中式供水,均未对水源水进行消毒处理。共采集水样160件,合格51件,合格率为31.9%。丰、枯水期及出厂水与末梢水水样合格率间比较,差异均无统计学意义。经完全处理的水样合格率为63.8%(51/80),高于未处理水样[0%(0/80)],差异有统计学意义(P<0.01)。不合格指标合格率由高至低依次为氨氮(95.0%)>浑浊度(91.3%)>臭和味(89.4%)>菌落总数(88.1%)>肉眼可见物(87.5%)>耐热大肠菌群(76.3%)>总大肠菌群(75.0%)>游离余氯(35.0%)。提示增城市农村饮水安全工程水质水质卫生状况不容乐观。
In order to know the sanitary status of drinking water in rural areas in Zengcheng City, the water quality of all the 20 rural drinking water safety projects in the city during the dry season (March-April) and the wet season (July-August) For testing and evaluation. The results showed that there were 10 water treatment plants (50%) with complete treatment process. The remaining 10 water treatment plants were small-scale centralized water supply. No disinfection of water source was conducted. A total of 160 water samples collected, qualified 51, the pass rate of 31.9%. Feng, dry season and the final water and water samples pass rate between the comparison, the difference was not statistically significant. The pass rate of the completely treated water sample was 63.8% (51/80), which was higher than that of the untreated water sample [0% (0/80)]. The difference was statistically significant (P <0.01). The highest pass rates of substandard indexes were ammonia nitrogen (95.0%), turbidity (91.3%), smelly taste (89.4%), total number of colonies (88.1%), macroscopic (87.5% Flora (76.3%)> Total coliform (75.0%)> Free residual chlorine (35.0%). Prompted by the city of rural drinking water safety project water quality and health status is not optimistic.