A NOVEL ELECTROCHEMICAL ADVANCED OXIDATION PROCESS WITH GENERATION AND REDUCTION OF OZONE

Abstract

 In this study, a novel electrochemical advanced oxidation process (AOP) was proposed and data on design and operating conditions were obtained from batch and continuous experiments. In batch experiments, ozone was stably produced by using SnO₂ anode and the highest current efficiency was about 12 %. In continuous experiments, it was found that effluent concentration of p-CBA decreased and increased with increasing electric current. Moreover, calculated results by a mathematical model assuming two rate-limiting steps (i.e. electrochemical reaction and mass transfer) and gas production were in good agreement with observed results. In addition, energy consumptions were in the range of 2 - 9 kWh/m³ and were comparable to other AOPs in the literature. From these results, it was considered that the proposed electrochemical AOP would be a feasible alternative to former AOPs because of simple operation and structure.