Study on the treatment of simulated coking wastewater by O3 and O3/Fenton processes in a rotating packed bed

Abstract

In this study, simulated coking wastewater was treated by the O₃/Fenton process in a rotating packed bed (RPB) and the results were compared with those by the O₃ process. Contrast experiments indicated that the degradation rates of phenol, aniline, quinoline and NH₃–N in the wastewater reached 100%, 100%, 95.68% and 100% respectively under the optimum operating conditions in the O₃/Fenton process and were much higher than those in the O₃ process. The BOD₅/COD value of the simulated coking wastewater treated in the O₃/Fenton process reached 0.46 and was 135% higher than that in the O₃ process. The degradation pathways of phenol, aniline, quinoline and NH₃–N in the simulated coking wastewater were also discussed. The results indicated that a combination of the advanced oxidation processes and the RPB can enhance the treatment efficiency of coking wastewater.