Applications of Membrane Bioreactor-Integrated Vertical Flow Constructed Wetland(SMBR-IVCW)System in Comprehensive Wastewater Treatment

YUAN Li-ying1,2,LIANG Wei1,XIAO En-rong1,2,CHANG Jun-jun1,2,WU Zhen-bin1(1.State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China;2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China)

SMBR-IVCW;MBR;integrated vertical-flow constructed wetland;combined technology;comprehensive wastewater

With the improvement of wastewater discharged standards,it is becoming a big problem for high-strength comprehensive wastewater treatment.It is a very difficult task for the present single treatment technology to meet the requirements.Membrane bioreactor and constructed wetland are two main technologies in the wastewater treatment,and they have significant advantages and shortcomings.In the paper,the pu-rification effects of the combined system with submerged membrane bioreactor(SMBR)and integrated vertical flow constructed wetland(IVCW)(SMBR-IVCW)on the comprehensive wastewater were studied,and the component of nitrogen in the influent and effluent was also analyzed.The concentrations of chemical oxygen demand(CODC)r,ammonia(NH3),total phosphorus(TP)and total nitrogen(TN)of the influent during the experimental period were 397～890,9.40～27.1,4.30～10.7,45.9～75.8 mg.L-1,respectively.The results showed:when the hydraulic loading rates of SMBR and IVCW were 1 000 L.d-1 and 375 mm.d-1,the removal rates of CODCr,NH3,TN and TP in the system were 97.5%,99.06%,59.6% and 65.21%,respectively.The component of nitrogen in the influent and effluent of SMBR-IVCW changed sig-nificantly,ammonia and organic nitrogen/nitrate and organic nitrogen occupied a dominant position,respectively.SMBR-IVCW system prob-ably could be served as a potential treatment technology for high concentrations of comprehensive wastewater.