Keywords: hydrodynamic cavitation, acoustic cavitation, dye degradation, kinetic modelling, oxidation, reaction parameters, geometric ratio, hydrogen peroxide, acid blue 113 dye, inlet pressure, power density, energy efficiency
Kinetic modelling on CI acid blue–113 dye degradation by acoustic and hydrodynamic cavitations
The objective is to study the effect of certain parameters on the degradation rate of the dye CI acid blue 113 by cavitation processes. Kinetic models have been developed and validated for ultrasonic and hydrodynamic cavitation treatment with hydrogen peroxide to enhance oxidation. The magnitude of effect of the reaction parameters in acoustic cavitation for geometric ratio, pH, ultrasonic density, initial dye concentration and hydrogen peroxide concentration were –0.4370, –1.2455, 0.1140, –0.3741 and 0.2788. In the case of hydrodynamic cavitation, values for initial dye concentration, pH, inlet pressure, power density and hydrogen peroxide concentration were –0.2562, –0.1494, 0.4556, 0.4807 and 0.1681. Finally, the energy efficiencies of the two processes have been compared. Hydrodynamic cavitation was found to be energy efficient than acoustic cavitation.