Abstract:Intermittent aeration moving bed biofilm reactor (IAMBBR) has high pollutant removal efficiency in treating wastewater, and could improve the total nitrogen (TN) removal in the MBBR process, especially suitable for depth processing nitrogenous wastewater．Effect of organic loading and aeration mode on pollutants removal performance of the IAMBBR in treating nitrogenous wastewater was studied in the experiments. The results indicated that average removal efficiencies of COD、ammonium and TN were 95.88%、92.22% and 76.73% with influent COD、ammonium and NO3--N concentration of 720, 20 and 100 mg/L, respectively, when the IAMBBR was operated with HRT of 12h, temperature of 25±2℃，pH of 6~9, organic loading of 1.44kg COD/(m3·d) and circulating aeration of 2h aeration and 4h stop aeration. And better organic pollutants and nitrogen removal performance could be achieved in single reactor. Meanwhile，operation mode of the IAMBBR had significant influence on biofilm morphology adhering to suspended carriers.