崇明县住宅小区二次供水现况调查及影响因素研究

发布时间：2018-04-15 00:41

本文选题：住宅小区 + 二次供水　；参考：《复旦大学》2013年硕士论文

【摘要】：目的：本研究旨在通过对崇明县住宅小区二次供水情况的调查,了解崇明县住宅小区二次供水水质、卫生管理及设施等状况,探索崇明县住宅小区二次供水水质的影响因素,并对住宅小区二次供水与市政管网水的水质进行检测和比较,了解二次供水与市政供水管网水水质各项指标均数及合格率的差异。方法：2012年6月-10月,采用方便抽样对崇明县60个住宅小区进行问卷调查和水质检测,了解住宅小区水质、卫生管理与设施等状况,并建立市政管网水对照。在调查时对每个调查小区物业单位(无物业单位则选择居民)进行询问,同时结合现场调查情况填写调查问卷,对每个小区市政管网水和二次供水用户进行入户采样,并现场检测部分水质指标。用EpiData3.0软件建立数据库,数据的录入采用双轨录入。数据库录入后使用SPSS13.0进行数据工作表进行清洗(逻辑性检测、缺漏项回访等),重新赋值和生成新的变量后,进行统计分析并统计分析。结果：本次调查研究60个二次供水住宅小区,采集送检和现场检测水样各60件。预调查发现崇明县预调查显示崇明县18个乡镇共有设置二次供水住宅小区128个,二次供水水箱数1217只,二次供水蓄水池数48只。二次供水与市政管网水水质指标均数比较,检测结果显示二次供水合格率为75.00%,低于市政管网水合格率的93.33%,具有统计学意义(P0.05)；实验室水质检测结果显示：总大肠菌群、菌落总数、pH、铝、锌、总硬度均数二次供水均高于市政管网水,具有统计学意义(P0.05)；现场检测结果显示：二氧化氯均数二次供水低于市政管网水,具有统计学意义(P0.05)。全县有总大肠菌群、菌落总数、浑浊度、臭和味、铁和二氧化氯6项指标不合格；二次供水总大肠菌群与二氧化氯不合格率均为6.67%,市政管网水均符合要求,差异有统计学意义(P0.05)。二次供水水质影响因素分析,不同市政管网水来源等单因素变化时,二次供水合格率不同,差异有统计学意义(P0.05)。多因素logistic回归分析,结果显示供水来源水厂等级与水箱(蓄水池)定期清洗消毒是二次供水水质的影响因素,差异有统计学意义(P0.05),(OR:0.075,95%CI:0.010-0.571,OR:0.015,95%CI:0.001-0.184)。结论：崇明县住宅小区二次供水水质、卫生管理与设施等现状与国家有关法律、法规和标准要求存在较大差异,住宅小区二次供水水质合格率低于市政网水合格率,不合格主要项目有微生物指标、浑浊度及消毒剂余量(二氧化氯)等,主要影响因素主要是供水来源水厂等级与水箱是否定期清洗消毒,这可能增加崇明县住宅小区二次供水污染突发事件发生风险,在下一步的工作中,应积极协调地方政府各部门共同关注住宅小区二次供水问题,清晰各住宅小区管理的责任单位,特别是关注水箱(蓄水池)定期清洗等工作,以防止二次供水污染事件的发生,保障地方群众饮水安全。
[Abstract]:Objective: the purpose of this study was to investigate the situation of secondary water supply in residential district of Chongming county and to find out the situation of water quality, sanitation management and facilities of secondary water supply in residential district of Chongming county, and to explore the influencing factors of secondary water supply quality in residential district of Chongming county.The water quality of secondary water supply and municipal pipe network water in residential district is tested and compared, and the difference of water quality index average and qualified rate between secondary water supply and municipal water supply network is understood.Methods: from June to October, 2012, 60 residential quarters in Chongming County were investigated with a questionnaire and water quality test. The water quality, sanitary management and facilities in the residential area were investigated, and the comparison of municipal pipe network water was established.During the investigation, the public property units in each district (no units select residents) were questioned. At the same time, combined with the field investigation, the questionnaire was filled out, and the municipal pipe network water and the secondary water supply users in each district were sampled into the household.Some water quality indexes were tested on the spot.The database is built with EpiData3.0 software, and the data input adopts double track input.After database input, SPSS13.0 is used to clean the data worksheet (logicality check, missing item return visit, etc.). After revaluing and generating new variables, statistical analysis and statistical analysis are carried out.Results: 60 secondary water supply residential areas were investigated and 60 water samples were collected and tested.The preliminary investigation shows that there are 128 residential districts with secondary water supply, 1217 secondary water tanks and 48 secondary water cisterns in 18 townships of Chongming County.Comparing the average of water quality index between secondary water supply and municipal pipe network, the test results show that the qualified rate of secondary water supply is 75.00, which is lower than 93.3333 of municipal pipe network water quality, which has statistical significance (P 0.05), and the results of laboratory water quality test show that: total coliform bacteria,The secondary water supply of total colony pH, aluminum, zinc and total hardness was higher than that of municipal pipe water, which had statistical significance (P0.05), and the results of field test showed that the secondary water supply of chlorine dioxide was lower than that of municipal pipeline water, and had statistical significance (P0.05).The total coliform group, total bacterial count, turbidity, odor and taste, iron and chlorine dioxide were not qualified in the whole county, the unqualified rates of total coliform group and chlorine dioxide in secondary water supply were 6.67 and the municipal pipe water all met the requirements, and the difference was statistically significant (P 0.05).The influencing factors of water quality of secondary water supply were analyzed. The qualified rate of secondary water supply was different when the water source of different municipal pipe network was changed, and the difference was statistically significant (P 0.05).The results of multivariate logistic regression analysis showed that regular cleaning and disinfection of water plants and cisterns (cisterns) were the influencing factors of secondary water quality, and the difference was statistically significant (P 0.05). The difference was statistically significant (P 0.05). There was a significant difference between 95% 95 CI: 0.010-0.571O: 0.015 ~ 95CI0.001-0.1844.Conclusion: the quality of secondary water supply, sanitary management and facilities in residential district of Chongming County are different from the national laws, regulations and standards, and the qualified rate of secondary water supply in residential district is lower than that of municipal water network.The main unqualified items include microbial indexes, turbidity and residual disinfectant (chlorine dioxide), etc. The main influencing factors are whether the water supply source water plant grade and water tank are cleaned and disinfected regularly.This may increase the risk of the sudden incident of secondary water supply pollution in residential areas in Chongming County. In the next step, we should actively coordinate the local government departments to pay common attention to the secondary water supply in residential areas.In order to prevent the pollution of secondary water supply and ensure the safety of drinking water for the local people, it is clear that the responsible units of the management of each residential district, especially paying attention to the regular cleaning of the water tank (cistern), and so on.
【学位授予单位】：复旦大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R123.1

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