高锰酸钾与氯胺联用预处理控制三卤甲烷生成

Combined pretreatment of potassium permanganate and chloramines to control trihalomethane formation

考察了高锰酸钾与氯胺联用预处理工艺对三卤甲烷(THM s)形成的控制作用.结果表明,在通常给水处理的高锰酸钾投量范围内(<2 mg/L),高锰酸钾与氯胺协同预处理可以有效降低THM s的生成量,高锰酸钾对三卤甲烷形成的控制作用是由多种作用机制共同作用的结果.与投药总量相同的单独氯胺工艺相比,采用高锰酸钾与氯胺联用预处理工艺,可以在提高消毒效果的前提下,进一步减少THM s的生成量.因此,采用该技术可以使预处理后水质的化学安全性和微生物安全性均得到提高.

The control function of potassium permanganate and chloramines to trihalomethane （THMs） formation in the combined pretreatment process was approached. The results showed that THMs formation can be ef- fectively controlled by the synergistic pretreatment of potassium permanganate and chloramines within the nor- mal range of potassium permanganate dosage in the drinking water treatment process （ below 2 mg/L）. The control effect of potassium permanganate to THMs formation is the results of combined action with multiple affecting mechanisms. The combined pretreatment process of potassium permanganate and chloramines may further reduce THMs formation on the premise of improved inactivation effects, compared with individual chlora- mine pretreatment of the same total dosage. Therefore, the treated water quality in both the aspects of chemical safety and microbial safety can be improved after the pretreatment of polluted raw water by this combined technique.