Abstract
For improving the treatment of landfill leachate by combination O3/H2O2, ceramic Raschig rings (CRR) with different surface areas were added to enhance mass transfer of ozone into liquid phase. To determine optimal conditions of reaction, pH and reaction time was also studied. The optimal pH range of 8–9, optimal reaction time of 80 min was identified in this research. CRR contribute to the significant improvement of efficiency of landfill leachate treatment by O3/H2O2 systems. With added CRR of 728 m2/m3 surface area, color, COD and TOC removal was increased in comparison with experiment without CRR is 8%, 14%, and 9%, respectively. In this condition, the ozone utilization efficiency was also higher than that of experiment without CRR. Content of O3 was also identified uses 3.441 kg O3/kg COD.
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