以鄂尔多斯某煤化工厂区内高级催化氧化工艺（AOP）降解高盐水COD系统为对象，考察了pH、臭氧浓度、气体流量、停留时间对高盐水COD降解效果的影响。试验表明，本项目高盐水COD降解的最优运行条件为：pH 10，臭氧浓度150 mg/L，预氧化段气体流量10 kg/h，一级催化氧化段和二级催化氧化段总气体流量40 kg/h，预氧化段停留时间20 min，一级催化氧化段停留时间30 min，二级催化氧化段停留时间30 min。系统在最优运行条件下，COD降解率高于50%，最高达75%，AOP系统运行成本为3.579元/t。

Advanced oxidation process (AOP) is used to degrade chemical oxygen demand (COD) in heavy salt water of a certain coal chemical factory in Erdos,Inner Mongolia,China.The effects of pH,ozone concentration,gas flow and residence time on the degradation efficiency of COD are investigated.The running effect and running cost are also discussed.Results indicate the optimum operating conditions as follows:pH=10,ozone concentration is 150 mg·L^-1,gas flow in pre-oxidation section is 10 kg·h^-1,total gas flow in the first and second oxidation sections is 40 kg·h^-1,residence time is 20 min for the pre-oxidation section,and both 30 min for the first oxidation section and the second oxidation section.The degradation rate of COD exceeds 50% under these operating conditions,with a highest degradation rate of 75%.The running cost of AOP is around 3.579 RMB/t.