针对某炼油厂二沉池出水回用过程中产生的反渗透浓水高盐、高硬、低COD和可生化性差的特点,采用催化臭氧氧化工艺处理,出水达标排放.实验确定了对臭氧氧化催化效果最好的催化剂,合适的反应条件为:反应时间大于30 min,臭氧质量浓度15-30 mg/L.经催化臭氧氧化处理后,反渗透浓水的COD降低至60 mg/L以下,满足排放要求,同时反渗透浓水可生化性提高.%Based on the characteristics of high salt content, high hardness, low COD and bad biodegradability, the reverse osmosis-concentrated water produced in the reuse of wastewater from the secondary sedimentation tank in a refinery was treated by catalytic ozonation process, and the effluent can meet the discharge standards. The best catalyst for catalytic ozonation is confirmed through experiments and the optimum reaction conditions are as follows: reaction time more than 30 min, ozone mass concentration 15-30 mg/L. After treated by catalytic ozonation, the COD of the reverse osmosis- concentrated water is decreased to below 60 mg/L, which can meet the discharge standards. At the same time, the biodegradability of the treated wastewater is improved.
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