生活饮用水总余氯卫生标准的研究

STUDY ON HEALTH STANDARD OF TRC OF DRINKING WATER

通过不同氨氯比例消毒后不同时间的效果观察和３０份出厂水的总余氯、自由性余氯、结合性余氯、细菌总数和总大肠菌群数的测定，结果发现氨氯比例为１：５时，在消毒３０分钟后，观察至１５０分钟，总余氯均维持在０．４ｍｇ／Ｌ以上。利用累积频率概率制图与直线回归方程求得当细菌学指标符合国家标准、余氯为０．３ｍｇ／Ｌ时，总余氯量应为１．４１ｍｇ／Ｌ，可作为现阶段生活饮用水卫生标准的总余氯建议值。并提出目前执行的出厂水余氯０．３ｍｇ／Ｌ可改为０．

Abstract This paper reports the effects of chloramine sterilization with different time and TRC. CRC.FRC total number of bacteria and t. coci in 30 samples the results showed that when chloramine proportion was 1:50, TRC manilained over 0.4mg/L from 30 minutes to 150 minutes after sterilization by using probability chart and lineaz regression egnatg, We think when bacteria indicate is within the the national standard, TRC is 0.3mg/L, the TRC is 1.4mg/L, whicn can be used as health standard at present and that 0.3mg/L FRC be change of 0.2mg/L.