重庆市某区农村居民饮用管网末梢水消毒质量分析  

Analysis of disinfection effect of the end water of a rural residents drinking pipe network

作　　者：罗华 穆超银 李月 LUO Hua;MU Chao-yin;LI Yue(Sichuan Qili Luyuan Technology Co.,Ltd.Dujiangyan Sichuan 611830,China;Chongqing Wanzhou District Center for Disease Control and Prevention)

机构地区：[1]四川齐力绿源科技有限公司,四川都江堰611800 [2]重庆市万州区疾病预防控制中心

出　　处：《中国消毒学杂志》2024年第5期344-346,共3页Chinese Journal of Disinfection

摘　　要：目的探讨重庆市某区农村水厂管网末梢水卫生状况,评价末梢水消毒效果。方法采取回顾性调查方法,收集整理2013-2018年该区农村水厂氯化消毒的管网末梢水质监测资料,包括菌落总数、总大肠菌群、大肠埃希菌和游离余氯共9项。结果共监测水样560份,合格320份,合格率57.14%。其中游离余氯、菌落总数、总大肠菌群和大肠埃希菌合格率分别为69.82%、87.68%、72.32%和81.61%。2017年游离余氯合格率最低,为57.00%,各年份间合格率差异有统计学意义(χ^(2)=17.950,P=0.004);2013年菌落总数、总大肠菌群和大肠埃希菌合格率最低,分别为64.00%、40.00%和58.67%,各年份间合格率差异有统计学意义(χ^(2)=68.808、61.599和36.300,P<0.001)。游离余氯枯水期合格率(65.94%)低于丰水期的(73.59%)(χ^(2)=3.887,P=0.049);而大肠埃希菌丰水期合格率(77.82%)低于枯水期的(85.51%)(χ^(2)=5.515,P=0.019)。结论该区农村水厂管网末梢水卫生状况不容乐观,仍存在一定程度的粪便污染。Objective To explore the sanitation condition of the end water in pipe network of a rural water plant,and to evaluate the disinfection effect of the end water.Methods By retrospective investigation method,water quality monitoring data of the end pipe network of chlorination disinfection in a rural water plant from 2013 to 2018 were collected.There were 9 indexes were included,such as total number of colonies,total coliform,Escherichia coli and free residual chlorine.Results A total of 560 water samples were monitored,and 320 were qualified,with a qualification rate of 57.14%.Among them,the qualified rates of free residual chlorine,total number of colonies,total coliform bacteria and E.coli were 69.82%,87.68%,72.32%and 81.61%,respectively.The lowest free residual chlorine qualification rate was 57.00%in 2017.The difference of qualification rate between the years was statistically significant(χ^(2)=17.950,P=0.004).The total number of colonies,total coliform bacteria and E.coli in 2013 were the lowest.Qualification rates were 64.00%,40.00%and 58.67%,respectively(χ^(2)=68.808,61.599 and 36.300,P<0.001).The qualification rate of free residual chlorine in the dry period was 65.94%lower than that of 73.59%in the flood period(χ^(2)=3.887,P=0.049).The qualification rate of E.coli was 77.82%lower than that of 85.51%in the dry period(χ^(2)=5.515,P=0.019).Conclusion The disinfection effec of the end water in the pipe network of a rural water plant is not optimistic,and the water is still contaminated by feces to a certain extent.

关 键 词：农村居民 管网水质 消毒效果 

分 类 号：R123.1[医药卫生—环境卫生学] R127[医药卫生—公共卫生与预防医学]