Investigation of Organic Compound Decomposition and Microbial Inactivation by a Cylinder Style Pulsed Discharge System in High Conductivity Solution

1.Introduction Discharge plasma that could generate ultraviolet light and active species is one of the applicable advanced technologies to the water treatment. Because of the high dielectric breakdown voltage, generation of the discharge plasma in water is difficult. Several plasma generation systems have been developed to generate discharge plasma in water directly. As the mechanism to generate plasma in water, gas bubble generated at the electrodes submerged in water could be a trigger to decrease dielectric breakdown voltage and generate discharge plasma , and injection of gas bubble has been investigated as the one of the method to readily generate and utilize discharge plasma in water. We also previously constructed novel submerged style pulse discharge system with gas bubble injection, and reported its characteristics and application to water treatment . This system could readily allow generating continuous discharge plasma in water. Decomposition of organic compound and inactivation of bacteria in water were successfully demonstrated. However, it was difficult to generate and utilize discharge plasma in the treatment water with high conductivity, because the electrodes in this style discharge plasma generation systems were in contact with the treatment water. Investigation of Organic Compound Decomposition and Microbial Inactivation by a Cylinder Style Pulsed Discharge System in High Conductivity Solution Takanori TANINO, Yukihiro TAMURA and Takayuki OHSHIMA 1 (Received September 10, 2013; Accepted November 19, 2013)