The experimental results showed that the system was efficient, achieving average removal efficiencies of 88% COD,98% NH4+ -N,70% TN and 83% TP, under the loading rates of 140 mg COD/(g MLSS-day), 32mg NH4+ -N/(g MLSS-day), 44mg TN/(g MLSS-day), and 5mg TP/(g MLSS-day).