After aerobic biological treatment of pharmaceutical wastewater with high concentration nitrogen, effluent COD and BOD 5 could meet the discharge standards specific for pharmaceutic industry, but effluent TN was still as high as 170mg/L.

• 含高浓度氮的制药废水经好氧生化处理后，虽然出水的COD、BOD5均可达到行业排放标准，但TN仍高达约170mg/L。