Keywords: 
• spraying discharge /
• non-thermal plasma /
• refractory organic

Abstract: In the experiment dielectric barrier discharge and corona discharge are combined in the same reactor, at the same time the high voltage electrodes are access to 50 Hz AC high voltage. The direct red dye solution is used for experimental wastewater. Electrode spacing of dielectric barrier discharge system is 30 mm and electrode spacing of corona discharge system is 25 mm. The voltage of power source is 20 kV. The non-thermal plasma and its active groups with performance of dielectric barrier discharge/corona discharge of highly atomized water which is formed in atmosphere are operated on the refractory organic molecules. The generating process of the spraying discharging non-thermal plasma is analyzed in the experiment. The efficiency of direct red dye degraded by non-thermal plasma is studied in the experiment. The COD of solution and spectral changes in the process of degradation are also studied in the experiment. The mechanism of refractory organics degraded by non-thermal plasma of spray discharge is proposed in the paper. The results show that discharging condition of reactor is good. A large number of non-thermal plasma and its active free radicals are generated in the discharging space. The above materials can be fully contacted with the organic molecules and the organic molecules can be oxidized and degraded.