本文的目的是介绍一个为期五个月的试验项目的结果 亚利桑那州图森市调查促进硝化作用的因素和控制方法。十二 对每个带有推流式反应器的平行先导处理装置进行了试验。反应堆系统 以类似于全面硝化事件的方式重现硝化过程 分销系统。之前的实验室研究得到了图森大学的支持，并在 德克萨斯州已经表明水中的亚氯酸盐离子阻止了硝化过程 稳定氨浓度。这些试点研究证实了之前的研究结果 亚氯酸盐离子和亚硝酸盐离子为控制硝化作用开辟了新的研究途径 使用额外的化学品。本研究得出以下结论: 为本研究设计的推流式反应器成功地再现了硝化条件 分配系统中硝化事件的代表； 连续的亚氯酸盐离子注入阻止了硝化作用的建立，甚至 浓度低至0.1 mg/L； 在已经进行了严重硝化的系统中，间歇性的亚氯酸盐离子注入 低至0.2 mg/L时，硝化作用完全停止数周 应用 间歇性剂量仅为0.05 mg/L的亚氯酸盐离子会破坏氨氧化反应 细菌（AOB）的数量，它能够在几周内重新建立自己，以及一系列 在同一反应器系统上，0.2 mg/L的间歇进料严重损坏AOB和 有效地停止硝化； 在研究的其他试点单位中，使用0.8的间歇剂量破坏AOB再生 mg/L；和 在使用氯胺的全面分配系统中，硝化作用似乎可以被抑制 通过短期和定期使用亚氯酸盐离子 浓度低至0.2 mg/L。包括8个参考文献、表格和图表。

The purpose of this paper is to present the results of a five-month pilot testing program in Tucson, Arizona to investigate the factors promoting nitrification and means of control. Twelve parallel pilot treatment trains each with plug-flow reactors were tested. The reactor systems reproduced the nitrification process in a manner similar to nitrification events in full-scale distribution systems. Previous laboratory studies supported by Tucson and full-scale systems in Texas have indicated that the presence of chlorite ion in water prevented the nitrification process and stabilized ammonia concentrations. These pilot studies confirmed the previous findings with chlorite ion and have opened new avenues of research for control of nitrification with minimal use of additional chemicals. The following conclusions can be drawn from this study: plug flow reactors designed for this study successfully reproduced nitrification conditions representative of nitrification episodes in distribution systems; continuous chlorite ion feed prevented nitrification from ever getting established, even at a concentration as low as 0.1 mg/L; in systems that already had serious nitrification underway, intermittent chlorite ion feeds as low as 0.2 mg/L stopped nitrification completely for several weeks after their application; an intermittent dose of only 0.05 mg/L of chlorite ion damaged the ammonia oxidizing bacteria (AOB) population, which was able to re-establish itself in a few weeks, and a serial intermittent feed of 0.2 mg/L on the same reactor system badly damaged the AOB and effectively stopped nitrification; in other pilot units studied, AOB regrowth was destroyed with an intermittent dose of 0.8 mg/L; and, in full-scale distribution systems using chloramines, it appears that nitrification can be prevented by short-term and regularly scheduled applications of chlorite ion at concentrations as low as 0.2 mg/L. Includes 8 references, tables, figures.