经济有效地控制氨氮废水污染是当前面临的重大课题。
Economical and effective control of pollution by ammonia-nitrogen waste water is a vital problem currently.
研究成果可为沸石法处理含氨氮废水的进一步研究提供一定的理论依据。
Those results can afford the theoretical foundation for development of the treatment technology by...
如何有效地去除废水中的氨氮是水污染防治界研究的重点和难点之一。
How to achieve high removal rate of ammonium is the emphasis to researchers.
工程上所采用的处理工艺和方法对焦化废水的处理效果还不能令人满意，尤其是氨氮。
Traditional methods and technologies can not make a satisfied result, especially for ammonium-nitrogen removal.
工程上所采用的处理工艺和方法对焦化废水的处理效果还不能令人满意，尤其是氨氮。
Traditional methods and technologies can not make a satisfied result, especially for ammonium-nitrogen removal.
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