近年来，许多亚洲国家发现其供水水源受到人类和牲畜废物的污染，导致水源中氨氮含量高。由于大多数亚洲国家采用断点氯化法，高氨是一个严重的水处理问题，需要增加氯的用量。香港正在兴建一个新的水处理厂，用于处理来自河流或水库的水。由于河水含氨量高，建议新工厂采用不同于目前使用的处理工艺。进行了一项中试工厂研究，以评估推荐的工艺，并确定设计标准和操作参数。本文讨论了生物滤池去除氨氮的中试研究。为了优化过滤器的氨氮去除效率，研究了启动时间、过滤介质和配置、氨氮水平、pH值、碱度和溶解氧等参数。

In recent years, many Asian countries have found their water supply sources have become contaminated with human and livestock wastes leading to high levels of ammonia nitrogen in the water sources. As most Asian countries practice breakpoint chlorination, high ammonia is a serious water treatment problem that requires increases in chlorine dosage. A new water treatment works is under construction in Hong Kong for the treatment of water drawn from a river or reservoir. As the river water is high in ammonia, different treatment processes from those currently in use were recommended for the new plant. A pilot plant study was conducted to evaluate the recommended processes and to establish design criteria and operational parameters. This paper discusses the pilot-scale study of ammonia removal by biological filters. Parameters including start up time, filter media and configuration, ammonia levels, pH, alkalinity, and dissolved oxygen were investigated in order to optimize the ammonia removal efficiency of the filters.