影响生活饮用水细菌总数指标的研究与评论

Study and evaluation of effect on the parameters of heterotrophic plate counts in drinking water in distribution networks

目的研究影响饮用水管网中细菌总数测定的实验条件及指标。方法对中国北方某市市区配水管网中自由余氯、浊度、总铁、总有机碳(TOC)等水质指标进行了监测。结果采用R2A培养基(R2A medium)及较长的培养时间得到的细菌总数,能较好地反应饮用水中微生物的水平;水温与细菌总数呈正相关关系;余氯与细菌总数有较好的负相关关系;浊度和总铁与细菌总数之间存在较好的正相关关系;TOC与细菌总数呈一定的负相关关系。结论在水力条件相对较为复杂的小区中,影响饮用水细菌总数的因素很多,不能用单一指标代表,要综合各种因素考虑。

To study of effect on conditions and parameters of heterotrophic plate counts. Methods Free chlorine, turbidity, total ferric, total organic carbon etc of distribution network were determinted in a northern city in China. Results HPC （heterotrophic plate counts） got from R2A medium with longer culture time can reflect the real situation of bacteria in drinking water well. Water temperature was positively related with HPC. Free chlorine was better negatively related with HPC. The results of turbidity and total ferric were better positively related with HPC. TOC content was positively related with HPC. Conclusion There are many parameters affecting dringing water quality especially in the residential area with complex water power condition, it can＇t be represented by one parameter and it should be thought about with all parameters synthetically.