Catalytic Oxidation Of Ozone And Activated Carbon Adsorption Process Deeply Treating Refractory Wastewater From Chemical Industrial Park

The sewage water which comes from sewage treatment plant in chemical industrial park is complex, difficult to be degraded. The sewage water which used by the test water come from jiangsu yancheng a sewage treatment plant. Ozone catalytic oxidation process and activated carbon adsorption process are used to deep treat the refractory wastewater which comes from the sewage treatment plant. At the same time, explore the ozone catalytic oxidation process and activated carbon adsorption process conditions, and the effects of factors on processing conditions, and seeking the optimal process conditions for ozone catalytic oxidation process and activated carbon adsorption process. And innovative to ozone catalytic oxidation process and activated carbon adsorption process together. Find a new treatment method to treat the refractory wastewater from the chemical industry park. In consideration of economy and under the condition of treatment effect, make the refractory wastewater reaches the national emission standards.Article separately study ozone catalytic oxidation process and activated carbon adsorption process, and the effects of reaction conditions on the process.The categories of catalyst which used in ozone catalytic oxidation process are screened in the test. The experimental results showed that:Manganese dioxide as catalyst, in the pH= 9,gas flow rate was 0.4 L/min, the water temperature is 25 ?,manganese dioxide powder catalyst dosing quantity is 1.5g/L, manganese sand particle catalyst particle diameter D= 3-4 mm, the experiment of hydraulic retention time of 1 h,ozone catalytic oxidation process under the condition of best effect. To conduct the thorough research to the ozone catalytic oxidation process of the water at the same time found that test in and out of the water of organic matter type and quantity differences, and further speculated that ozone catalytic oxidation process to remove effect may be associated with the degree of saturation of organic matter. Test compardes the adsorption effect of modified activated carbon, coconut shell activated carbon, coal based activated carbon and activated coke, the results show that modified activated carbon, coconut shell activated carbon for the experiment of organic matter has strong water absorption performance. In activated carbon adsorption experiment, the best activated carbon additive quantity is 2g/L, and the best adsorption time is 30 mine for modified activated carbon and coconut shell activated carbon. Heat up can promote active carbon adsorption rate, but smaller influence on adsorption balance point.Through the study of the dynamics of the test data analysis found that activated carbon adsorption process of liquid membrane diffusion is the major steps to control speed.Through the study of the thermodynamic analysis of test data found that activated carbon adsorption are mainly pHysical adsorption. The catalytic oxidation of ozone and activated carbon adsorption processTests of the comprehensive utilization of ozone catalytic oxidation process and activated carbon adsorption process are used to treat the sewage water. Activated carbon additive quantity is greater than 1 g/L, at the same time, ozone dosing quantity is greater than 100 mg/L, the AC+ O3 process and O3+AC experiment process can be achieved that effluent COD is less than 50 mg/L of national emission standards. In the case of water proof test to achieve discharge standard, compares the economy of the AC+O3 process and O3+AC process, the study found that AC+O3 process cost is low. And innovative to ozone catalytic oxidation process and activated carbon adsorption process together. The removal rate of COD can reach 82%.