A pilot test is carried out to treat Beijing suburb campus sewage by using integrated constructed wetland system, which combines three systems that are multi-level complex constructed wetland system, buried integration pretreatment system and wetland landscape system. Results show that the integrated system has a good pollutant removal efficiency: COD is mainly removed in the integration pretreatment system with an average removal rate of 96.87%; as NH4-N, TN and TP are mainly removed in the multi-level complex constructed wetland system, the average concentrations in effluent of COD, NH4-N, TN and TP are 45.58, 19.51, 31.9 and 1.49 mg/L, respectively; the Wetland landscape system also plays a role of depth processing, as the average concentrations in effluent of COD, NH4-N and TP are 13.33, 0.34 and 0.53 mg/L, respectively.
