When the average NH3-N concentration in influent was about 25mg/L, the NH3-N removal efficiency with porcelain or ceramsite as carrier media was both above 90%. The best bed height for nitrification was 20cm.

• 进水NH3-N浓度平均值在25mg/L左右,瓷粒和陶粒填料对NH3-N的去除率均在90%25以上,硝化作用的最佳床层高度为20cm。