The average removal rate of COD, NH_4~+-N, TN, PO_4~(3-) was respectively 90.7%, 79.7%, 70.2% , 87%, when HRT was 12.8h, SRT was 25d, reflux ratio of nitrification was 3. With this condition, the effect of denitrifying dephosphatation was well.是什么意思_The average removal rate of COD, NH_4~+-N, TN, PO_4~(3-) was respectively 90.7%, 79.7%, 70.2% , 87%, when HRT was 12.8h, SRT was 25d, reflux ratio of nitrification was 3. With this condition, the effect of denitrifying dephosphatation was well.在线翻译_英语_读音_用法_例句