Title :
Investigation of pulsed dielectric barrier discharge system on water treatment by liquid droplets in air
Author :
Song Jiang ; Yiyong Wen ; Kefu Liu
Author_Institution :
Inst. of Electr. Light Sources, Fudan Univ., Shanghai, China
Abstract :
The application of non-thermal plasma excited by strong electric fields is becoming a key technology for water treatment because of the efficient generation of oxidants, such as hydroxyl radicals, and no secondary 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 consists of five rows of staggered positive and negative electrodes and separating plates. Wastewater dropped into the discharge area from the tiny holes in the separating plates. Degradation of indigo carmine solution was attempted by this system. 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 energy cost of the degradation of indigo carmine reached 80 g/kWh.
Keywords :
dielectric-barrier discharges; drops; hydrogen compounds; oxidation; oxygen compounds; pH; plasma applications; wastewater treatment; H2O2; air; degradation rate; dielectric barrier discharge reactor; discharge area; discharge frequency; discharge time; discharge voltage; electric fields; frequency 200 Hz; hydroxyl radicals; indigo carmine degradation; initial pH value; liquid droplets; negative electrodes; nonthermal plasma; oxidants; positive electrodes; pulsed dielectric barrier discharge system; pulsed power generator; separating plates; time 8 min; voltage 30 kV; water treatment system; Degradation; Discharges (electric); Gases; Generators; Inductors; Oxidation; Water pollution; Pulsed dielectric barrier discharge; degradation; hydrogen peroxide; water droplets;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2015.7179142