同时．考察了粒径、 滤速等对沸石除氨氮效果的影响。
The influence of Zeolite size, filter velocity and contact time on removing -nitrogen has been discussed too.
简要分析了生物、化学、物理化学三类除氨方法的优缺点；
The advantages and disadvantages of ammonia removal by biological, chemical and physical chemical methods are analyzed.
采用前、后处理系统来满足过滤、除氨氮、杀菌消毒、增氧等需要。
Adopting prior and posterior deposal system met the demands of filtrating, removing ammonia, rising oxygen, sterilizing and antisepsis.
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