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介绍了氯胺消毒管网中的硝化作用及其控制方法,并对控制方法进行了总结和展望。在采用氯胺消毒的给水管网中,存在着硝化反应发生的可能性。硝化作用会造成出水亚硝酸盐含量升高、消毒剂含量降低、异养菌繁殖等危害。国内外对氯胺消毒管网中硝化作用控制方法的研究主要集中在改变出厂水水质条件-pH、提高消毒剂的浓度、优化氯胺投加方式、管道冲洗、硝化潜能曲线及投加亚氯酸根控制硝化作用。目前以上的控制方法对硝化作用起到了一定的抑制作用,但是存在控制效果不确定、不具有长期性或者增加生成消毒副产物的风险。因此,对硝化作用的控制方法有待深入研究。笔者提出了氯胺、二氧化氯联合消毒控制硝化作用的方法。
The nitrification and its control method in chloramine disinfection pipe network were introduced. The control methods were summarized and prospected. In the use of chloramine disinfection of the water supply network, there is the possibility of nitrification. Nitrification will cause the effluent nitrite content increased, disinfectant content decreased, heterotrophic bacteria and other hazards. At home and abroad, the research on the control of nitrification in chloramine disinfection pipe network mainly focuses on the change of -pH, the concentration of disinfectant, the optimization of chloramine dosage, pipeline flushing, nitrification potential curve and dosing of chlorine Root control nitrification. At present, the above control methods play a certain inhibitory effect on the nitrification, but there is an uncertain control effect, no long-term effect or an increased risk of generating disinfection by-products. Therefore, the control of nitrification needs further study. I proposed chloramine, chlorine dioxide disinfection control nitrification method.