The Preliminary Study Of Degrade Simulated Wastewater Using Gliding Arc Plasma

Gliding arc is the subject of renewed interest, which discharged in normal temperature and pressure. The applications of plasma are constantly increasing in the field of environmental protection in recent years. The arc glides between divergent electrodes in a gas flow at atmospheric or higher pressures. Non-thermal plasma processing using gas-liquid two phase gliding arc discharge has been investigated as an alternative method for the degradation of organic compounds contained in aqueous solution. This technique is strongly attractive due to its particular working conditions (ambient temperature and atmospheric pressure). Its application is related to the chemical properties of the active radicals formed in the discharge. This paper discusses the composing mechanism of these radicals and also the function of them.Gas-liquid two phase gliding arc discharge can degrade organic contaminants. In order to fix on the best working condition we did lots of experiments. Use gliding arc to degrade the mixed liquor, through changing all kinds of experimental parameters. This article takes the phenol and the gentian violet solution as example to show the principles of using non-thermal plasma to degrade organic pollutant at normal temperature and atmospheric pressure.The experiment indicated that, carrier gas type, electrode parameter, gas-fluid mixture ratio and catalyst Fe²⁺ etc. may all effect on the degradation. And when using air as the carrier gas the velocity is 0.2m³/ h, the degeneration effect of phenol is best. The COD value is only 8.68% left. However, the degeneration effect of gentian violet is even better, once the liquor go through the region of plasma it may decompose voluntarily. There is some deposition on the bottom of the container 48 hours after degradation, and the upper bed clear solution is lucidly, its COD value is almost zero.