二氧化氯、氯胺顺序投加联合消毒工艺的研究

以天津市某自来水厂的滤后水为研究对象,采用二氧化氯、氯胺顺序投加联合消毒工艺对其进行消毒处理。运用化学分析和生物学试验的方法,考察了经不同投量的组合消毒后消毒剂残余量的变化,以及联合工艺的消毒效果和持续消毒能力。试验结果表明,经不同投量组合的二氧化氯、氯胺顺序投加联合消毒后,出水中的细菌总数及总大肠菌群均达到《生活饮用水卫生标准》的要求。氯胺投量对总余氯和二氧化氯残余量的影响显著,而二氧化氯的投加量对其残余量的影响不大。二氧化氯、氯胺顺序投加联合消毒工艺在低投量组合下就能达到良好的消毒效果,且持续消毒能力强。

Combined Disinfection Process of Chlorine Dioxide and Chloramine in Drinking Water Treatment

Raw water was taken from the filtrated water of a waterworks in Tianjin and disinfected by the combined process of chlorine dioxide and chloramine. The variation of residual disinfectants within a given time after the combined disinfection with different dosages as well as the disinfection effect and the persistent disinfection ability of the combined process were investigated using chemical analysis and biological tests. After the combined disinfection with different dosages of chlorine dioxide and chloramines, the total bacteria and coliform counts can meet the requirement of the Standards for Drinking Water Quality. Chloramine dosage has a significant influence on total residual chlorine and residual chlorine dioxide, while chlorine dioxide dosage has not a significant influence on its residual quantity. The combined disinfection of chlorine dioxide and chloramine is effective and persistent when chlorine dioxide and chloramine are at low dosages.