Combined Process of Continuous-flow Integrated Biological Reactor and Wavy Subsurface-flow Constructed Wetland for Treatment of Municipal Wastewater

Based on the municipal wastewater characteristics in Wuhan City,the combined process of continuous-flow integrated biological reactor(CIBR) and wavy subsurface-flow constructed wetland was used to treat the municipal wastewater.The research shows that the influence of seasonal change in water quality and the change of the wetland treatment ability on the effluent quality can be effectively reduced by adjusting the operating condition of CIBR to distribute the pollutant load suitably.When the average energy consumption of the combined process is 0.19(kW·h)/m3,the average effluent concentrations of COD,NH3-N,TN and TP are 15.68 mg/L,3.25 mg/L,8.69 mg/L and 0.50 mg/L,respectively,reaching the class Ⅰ-A criteria specified in Discharge Standards of Pollutants for Municipal Wastewater Treatment Plants(GB 18918-2002).The total energy consumption of the combined process is 0.22(kW·h)/m3.The treatment energy consumption can be saved by 20.77% and 40.12% respectively compared with A2/O process and Bardenpho process.