(632f) Application of SPCP (Surface corona discharge-induced Plasma Chemical Process) Reactor for Aeration Treatment of Polluted Water and Its Characterization

Aeration treatment of polluted water was tried by applying the SPCP (Surface corona discharge-induced Plasma Chemical Process) reactor which was developed for efficient gas treatment. Advantage of the SPCP reactor compared to the conventional polluted water treatment system which normally uses ozone generator and disperser separately is that various reactive oxygen species with short life time other than ozone is expected to be utilized for decomposition reaction of pollutants because the produced ozone and other reactive oxygen species can be delivered to reaction zone immediately after generation which is due to the unique configuration of the reactor. In this report, the performance of the SPCP reactor was studied by comparing with the conventional polluted water treatment system. Experiments using potassium iodide solution showed that SPCP reactor system produces ozone in the concentration nearly equal to the conventional system at lower energy density, and the higher ozone concentration at the higher energy density. The PCE (perchloroethylene) elimination rates in solution in both systems showed a pseudo first order kinetics. From the results of ozone concentration dissolved in PCE solution, it was found that the two systems have about the same contribution of direct ozonation. On the other hand, the apparent rate constant of the PCE elimination was higher in the case of SPCP reactor system. It is suggested therefore that SPCP reactor system yields the higher contribution of reactive oxygen species beside ozone.