There are many ways such as physics, chemistry, ion exchange, man-made wet land and biology etc. wastewater nitrogen removal. The biological way is used widely now.
近年来污水脱氮主要有以下几种基本方法：物理法、化学法、离子交换法、人工湿地法及生物法，生物法是目前应用最广泛的方法。
There are many ways such as physics, chemistry, ion exchange, man-made wet land and biology etc. wastewater nitrogen removal. The biological way is used widely now.
近年来污水脱氮主要有以下几种基本方法：物理法、化学法、离子交换法、人工湿地法及生物法，生物法是目前应用最广泛的方法。
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