Electrical discharge-based advanced oxidation processes were used with the gas bubbling technique in the presence of a catalyst for the efficient removal of dyes from aqueous solutions. The advantage of non-thermal plasma treatment over conventional treatment methods for the removal of pollutants is the mineralization of the pollutants into harmless byproducts. For the removal of Congo red dye, the effects of different factors like applied voltage, initial concentration of the dye, initial concentration of the catalyst, gas flow rate, and treatment time were looked at. In the presence of gas bubbling and a catalyst with non-thermal plasma, an 84.1% dye removal efficiency was observed at an applied voltage of 22 kV for a treatment time of 15 min.