The COD, ammonia and total nitrogen (TN) removal efficiency were studied in the paper at low DO concentration in a pilot-scale A/O nitrogen removal plant treating domestic wastewater.
应用A/O中试装置处理实际生活污水，研究了低DO浓度下系统对有机物、氨氮和总氮的去除效果。
The Total Nitrogen Analyzer (TN-2000) based on the principle of high temperature oxidation & chemiluminescence can be used in the on-line monitoring of surface water and waste water.
以本方法为工作原理的TN-2000型总氮测定仪可用于地表水质及污水的在线监测。
The treatments all caused total phosphorus(TP) , total nitrogen(TN), and content of chlorophyll-a(Chl. A) in the overlying water obviously reduced.
种植沉水植物可使水体总磷、总氮、叶绿素a含量显著降低，且伊乐藻对总磷的净化效果优于菹草；
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