The purification process of high concentration methanol wastewater intensified by non-thermal plasma(NTP) combined with packed adsorption bed had been investigated. The results showed that the four types of packed bed materials

4A molecular sieves

ceramsite

ceramic Rasching ring and γ-Al2O3

could adsorb methanol rapidly

but reached the adsorption saturation easily. The adsorption velocity and equilibrium absorption capacity of 4A molecular sieves was better than the others. In the multi-needle-plate DBD (dielectric barrier discharge) non-thermal plasma purification system

the degradation rate of COD increased with increasing discharge time and discharge voltage. The degradation effect of NTP combined with packed bed was better than single purification process. In the initial reaction stage of combination process

the rapid degradation of COD was dominated by packed bed adsorption process. However

NTP played a main role in the degradation process with prolongation of discharge time. The methanol

both in liquid phase and adsorbed in packed bed

had been oxidized by active groups which generated by NTP. The maximum degradation rate of COD was more than 90% in this experiment. The adsorption process of packed bed followed the pseudo-second order adsorption kinetic equation. The reaction order of NTP degradation process increased with the decline of pollutant concentration and the prolongation of discharge time. In the synergistic purification system

the adsorption process of packed bed would be influenced by NTP

and vice versa. The active groups generated by NTP had an activating effect on the contaminant

both in liquid phase and adsorbed in packed bed. Therefore

the concentration ratio of contaminant and hydroxyl radical(·OH) in liquid phase would be changed constantly under the process of packed bed adsorption and NTP oxidation. The reaction order of macroscopic reaction kinetics of synergistic process increased with the decrease of methanol concentration in liquid phase.