Research Of The Processing Result And Mechanism Of The Ozone Oxidation Technology On Various Types Of DYE

Ozonation treatment of wastewater is high-cost. In order to industrialize the treatment, the effective method to reduce costs is to improve the utilization efficiency of ozone. The single factor tests is used to obtain experimental data. The optimal working parameters are obtained by orthogonal experiments. Three ozonation methods are investigated according to CODcr, color removal and impact factors. Ozone oxidation, ozone-UV advanced oxidation and ozone-activated carbon, which are three ozonation methods to treat the dyeing wastewater with azo or anthraquinone, are seperately used in experiments. One of the water using in experiments is simulated using dye solution, and the other is the mix of industrial wastewater collected from factories.(1) Using ozone oxidation, azo dye Acid Red 405 and Acid Blue 113, after the reaction of 60 minutes, the effluent color removal reached 98% and 96%. CODCr removal rate reached 48.62% and 35.81%. Anthraquinone dye Disperse Red 60 and Disperse Blue 60, after the reaction of 90 min, color removal rate achieved 88% and 52.7%. CODCr are just 28% and 33%.(2) Separately using ozone oxidation of Acid blue 113, the optimum reaction conditions of color removal rate and CODCr removal rate, quantity of O3= 6 g/h, pH= 5, the initial concentration= 400 mg/L, quantity of O3=6 g/h, pH= 7, initial concentration= 600 mg/L.Anthraquinone Disperse Blue 60 amount of optimum reaction conditions for quantity of O3=6 g/h, pH= 9, initial concentration= 200 mg/L.(3) Ozone-UV advanced oxidation method, azo dye Acid Red 405 and Acid Blue 113, after the reaction of 60 minutes, respectively, color removal rate reached 99% and 98%, CODCr removal rate reached 27.53% and 60.68%. Anthraquinone dye Disperse Red 60 and Disperse Blue 60 reacts with 90 min, color removal rate were 98.76% and 94.02%, CODCr removal rate reached 19.47% and 63.20%.(4) Using ozone-UV advanced oxidation method, the optimum reaction conditions of color removal rate and CODcr removal rate, quantity of O3= 6 g/h, pH= 7, the initial concentration= 400 mg/L. Anthraquinone Disperse Blue 60 amount of optimum reaction conditions for quantity of O3= 4 g/h, pH= 7, initial concentration= 600 mg/L, quantity of O3= 6 g/h, pH= 7, initial concentration= 400 mg/L(5) Activated carbon-ozone oxidation azo dye Acid Red 405 and Acid Blue 113 dye wastewater, after the reaction of 60 minutes, color removal rate reached 98% and 96%, CODCr removal rate reached 35.97% and 36.71%. Anthraquinone dye Disperse Red 60 and Disperse Blue 60 dye wastewater, with the reaction of 90 min, color removal rate reached 90.27% and 90.18%. CODCr removal rate reached 28.72% and 32.21%.(6) Activated carbon-ozone oxidation azo dye acid blue 113, the optimum reaction conditions of color removal rate and CODcr removal rate, the concentration of activated carbon= 450 mg/L, pH= 7, the initial concentration= 800 mg/L, the concentration of activated carbon= 450 mg/L, pH= 5, the initial concentration= 600 mg/L. Anthraquinone Disperse Blue 60 amount of optimum reaction conditions for the concentration of activated carbon= 300 mg/L, pH= 7, initial concentration= 600 mg/L, the concentration of activated carbon= 450 mg/L, pH= 7, initial concentration = 400 mg/L.(7) The same concentration and reaction time, using three kinds of ozonation method for processing an azo dye Acid Red 405 and anthraquinone dye Disperse Red 60 dye wastewater, UV ozone catalytic oxidation method significantly effect on the treatment. Ozone-UV advanced oxidation method handles both analog dyeing wastewater after treatment in two simulated dye wastewater biodegradability are significantly improved.(8) Ozone-UV advanced oxidation method handles the actual dyeing wastewater, actual dye wastewater reaction three hours to achieve the desired color removal. The actual removal of CODCr with the reaction time and increase(9) Before ozone advanced oxidation reaction, the actual poor biodegradability, difficult biodegradable. After treatment by ozone oxidation method, actual wastewater biodegradability is improved, indicating that ozone advanced oxidation method effect in terms of improving the wastewater biodegradability.