去氮法，脱氮（作用）...

The basic principles, current situation and trend of urban sewage biological denitrogenation are introduced.本文介绍了城市污水生物脱氮的基本原理, 研究现状和进展....

denitrogenation的音标：denitrogenation的英式发音音标为：[denɪtrədʒə'neɪʃn]denitrogenation的美式发音音标为：[denɪtrədʒə'neɪʃn]...