当对含有高浓度氨氮和有机物的污染水进行预氯化处理时，所需的过量氯会在成品水中产生氯仿和其他三卤甲烷。为了避免使用预氯化，我们对单独的填充床过滤和臭氧氧化前的填充床过滤进行了并行研究。结果表明，当容积负荷为<300 g NH+4-N/m3时，以焦炭和砾石为介质的填料床过滤器可去除>90%的氨氮。d、 有机物也会被去除，但程度较低。臭氧氧化似乎没有显著改善生物过滤器的性能。 水的溶解氧含量对控制过滤器的性能非常重要。一般来说，填充床过滤对于减少预氯化所需的氯剂量是有效的。（注:本文A部分图4的勘误更正见1993年9月的AWWA期刊第4页。）包括16个参考文献、表格和图表。

When polluted waters containing high concentrations of ammonia-nitrogen and organics are treated with prechlorination, the excessive dosages of chlorine required produce chloroform and other trihalomethanes in the finished water. In an attempt to avoid the use of prechlorination, packed-bed filtration alone and packed-bed filtration preceded by ozonation were studied side by side. The results indicate that packed-bed filters using coke and gravel as the media can remove >90 percent of the ammonia-nitrogen when the volumetric loading is <300 g NH+4-N/m3.d. Organics are also removed, but to a lesser extent. Ozonation did not seem to significantly improve the performance of the biological filters. The dissolved oxygen content of the water was important in controlling the performance of the filters. In general, packed-bed filtration was found to be effective for reducing the dosage of chlorine needed for prechlorination. (NOTE: An erratum correcting part A, Figure 4 of this article appears on p. 4 of the September 1993 Journal AWWA.) Includes 16 references, tables, figures.