The investigation of pulsed dielectric barrier discharge system on water treatment by liquid droplet in air

The application of non-thermal plasma excited by strong electric fields on water treatment is becoming a key technology because of the efficient generation of oxidants and no second pollution. In this paper, a water treatment system mainly consisting of a pulsed power generator and a dielectric barrier discharge reactor was constructed. The reactor consisted of five rows of staggered electrodes and separating plates. Wastewater dropped into discharge area from the tiny holes of separating plates. The Indigo carmine solution was used as wastewater in the treatment. The effects of discharge time, discharge voltage, frequency, initial pH value, and H₂O₂ were studied. The degradation rate came to 100% in 8 minutes at the voltage of 30 kV and frequency of 200 Hz under the initial concentration of 450 mg/L. The max energy yield of the degradation of indigo carmine reached 80 g/KWh.