Ozone Generation Using Micro Barrier Discharge in Water

An ozonizer operating in water for the generation of ozone water was proposed and examined. The key to ozone generation was the use of a flat circular Shirasu porous glass (SPG) with a mean pore diameter of 10�m, which functioned in bubble supply and the formation of micro-barrier discharges. The micro-barrier discharges were formed in micropores of the SPG, and bubbles formed in contact with the SPG surface facing the water phase side. The higher the applied ac voltage, the higher the uniformity of discharges and ozone concentration became. In the case of a SPG membrane with a mean pore diameter of 10�m, we confirmed that an optimal gas pressure existed at around 120kPa.