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目的了解自贡市生活饮用水卫生细菌污染状况,为保障本市生活饮用水水质安全提供科学依据。方法于2010年丰水期和枯水期按《生活饮用水标准检验方法》(GB 5750/T-2006)分别对自贡市市县级和乡镇水厂的水源水、出厂水和管网末梢水进行菌落总数、总大肠菌群和余氯测定。结果 2010年全市出厂水和管网末梢水的菌落总数和总大肠菌群的合格率分别为50.00%、74.31%,其中市县级水厂的合格率为75.00%和100.00%,乡镇水厂的合格率为35.94%和62.50%;枯水期的合格率为63.89%和77.78%,丰水期的合格率为36.11%和70.83%。市县级水厂的出厂水和管网末梢水细菌指标合格率高于乡镇水厂,枯水期高于丰水期;出厂水、末梢水菌落总数与水源水菌落总数呈正相关;菌落总数与余氯呈负相关。结论自贡市应重点加强乡镇生活饮用水的监测和监管,尤其是丰水期;在消毒时应严格按照相关规定进行,确保自贡市生活饮用水水质安全。
Objective To understand the status of sanitary bacteria in drinking water in Zigong City and provide a scientific basis for the safety and quality of drinking water in Zigong City. Methods In the wet season and the dry season of 2010, according to the Standard Test Method for Domestic Drinking Water (GB 5750 / T-2006), the colony of tap water, ex-factory water and pipe network of Zigong City Total, total coliforms and residual chlorine determination. Results In 2010, the total number of colonies and total coliform bacteria in the ex-factory water and the end-of-pipe water in the city were 50.00% and 74.31% respectively, of which the passing rate of municipal waterworks was 75.00% and 100.00% The pass rates were 35.94% and 62.50%. The passing rates in the dry season were 63.89% and 77.78% respectively. The pass rates in the wet season were 36.11% and 70.83%. The qualified rate of factory water and pipe water end bacteria index of city-level waterworks was higher than that of township waterworks, and the dry season was higher than the wet season. The total number of water and peripheral water colonies was positively correlated with the total number of water-sourced water colonies; Negative correlation. Conclusion Zigong City should focus on strengthening the monitoring and supervision of drinking water in towns and villages, especially in wet season; in disinfection should be strictly in accordance with the relevant provisions to ensure that Zigong city drinking water quality and safety.