Application of Catalytic Ozonation System in Advanced Treatment of Organic Concentrated Water by Membrane Method
Eryuan WWTP has a treatment capacity of 1.0×104 m3/d,and the main process is the"membrane bioreactor(MBR)-nanofiltration"dual membrane process.The concentrated water generated by the nanofiltration system is treated by the ozone catalytic oxidation treatment system and mixed with the nanofiltration water.The main indices of the mixed water meet the class Ⅲ(lake,reservoir)standards in the national Environmental Quality Standards for Surface Water(GB 3838-2002),and achieve zero wastewater discharge.The ozone catalytic oxidation treatment system adopts a two-stage design with a treatment capacity of 1 000 m3/d.The performance test of the ozone catalytic oxidation system after one year of operation with water shows that the overall treatment effect is stable,the average mass concentration of chemical oxygen demand(CODCr)after ozone catalytic oxidation treatment is reduced from 148.39 mg/L to 75.45 mg/L,and the power consumption is about 1.85 kW·h/m3.The results show that the ozone catalytic oxidation process is an effective process for advanced treatment of organic concentrated water by membrane method.
catalytic ozonation systemwastewater zero dischargechemical oxygen demand(CODCr)organic concentrated water by membranemethod advanced treatment
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