【摘要】 参照成都市第五自来水厂制水过程,就取消预氯化对混凝效果的影响及其在防止饮水致突变性中的作用进行了实验研究。结果表明:预氯化能提高三氯化铁和聚合硫酸铁的混凝效果,若取消预氯化,需分别增加77.7％和86.4％的投药量;而对碱式氯化铝(在实际投加范围内)的混凝效果无明显影响,取消预氯化时,投药量不必增加;取消预氯化平均约能降低饮水的致突变性34％(TA100)和38％(TA98)。据此认为,取消预氯化具有可行性。更多还原

【Abstract】 The bench scale study has been done on the effects of non-prechlorination on action of coagulants and rautagenicity of drinking water by mimicking the water processes of Chendu Fifth Plant. The results showed that pre-chlorination could improve the ability of coagulation of ferric chloride and polymeric iron sulphate, and the dosages of them had to be increased by 77.7% and 86.4% respectively if pre-chlorination process was cancelled) however, it didn’t affect the action of coagulation of polyaluminum chloride, so its dosage need not increasing as the pro-chlorination was cancelled. As a result of non-prechlorination the mutagenic potential of drinking water was decreased 34% ( to TA100)and 38% ( to TA98 ). According to the results of the research,non-prechlorination is practicable.更多还原