Study On Volatile Organic Compounds Treatement Using Biotrickling Filter Enhanced With Dielectric Barrier Discharge

In this paper, simulated dichloromethane and p-xylene gas was absorbed and treated by selfmade Dielectric Barrier Discharge (DBD) reactor. Results showed that the non-thermal plasma performs very well in removing both VOCs, and the main products were CO2and H2O.Further study was focused at the impacts of the voltage, initial concentration, and the residence time on the removal efficiency of VOCs. With a peak voltage of32.5kV, a residence time of10s and a initial concentration of500mg/m3, the DBD reactor with a diameter of2mm electrode was to be thought the the most fitting system in removing p-xylene from the simulated gas.We also paid attention to the ecomonic indicator of the energy density(ED) and energy yield(EY) in degragation reaction. According to the analysis, we found the EY increased with the increasing power and initial concentration, and the removal efficiency is exponential based on ED.The final experiment was study the biodegradability of p-xylene with Bio-trickling filtration(BTF) which was already in a Stable operation. Based on the research of both DBD and BTF, we Combined process DBD and BTF to deal with the simulated p-xylene, and we could draw a conclusion that Combined process not only could improve the removal efficiency,but also benefit to remove the by-products that was made by DBD reactor, consequently avioded secondary pollution problem.