摘要
为解决净水厂应用二氧化氯(ClO2)导致的消毒副产物亚氯酸盐(ClO-2)超标问题,对ClO-2生成量与ClO2投加量、接触反应时间及原水pH相关性进行了测定分析,开展了以次氯酸钠(NaClO)替代ClO2消毒,同时保留ClO2预氧化的模拟试验与生产性试验。结果表明,ClO-2生成量与ClO2投加量显著相关,反应时间、原水pH对ClO-2生成量影响较小,采用ClO2预氧化与NaClO消毒联用,不仅确保了水质消毒效果,而且使水中ClO-2浓度大幅度降低并稳定达标。
For reducing the generation of chlorites,which is the harmful by-product of chlorine dioxide used as a disinfectant in the water treatment process,relations were studied between chlorites production and dosing rate of chlorine dioxide,as well as retention time and pH value of raw water.Morever,experiments were carried out by using chlorine dioxide as pre-oxidation and combined with sodium hypochlorite as disinfection alternative to chlorine dioxide.It shows that the generation rate of chlorites is,directly related with dosing rate of chlorine dioxide,but obviously irrelevant both with retention time and pH value of raw water.Combined dosing with chlorine dioxide and sodium hypochlorite ensures the disinfection effect and significantly reduces the amout of chlorites,in addition the treated water stably reaches the water quality standard.
出处
《给水排水》
CSCD
北大核心
2010年第6期21-26,共6页
Water & Wastewater Engineering
关键词
二氧化氯
次氯酸钠
消毒副产物
亚氯酸盐
Chlorine dioxide
Sodium hypochlorite
Disinfection by-products
Chlorites
