Effects of the Integrated Water Temperature Management System on Biological Leachate Treatment in SUDOKWON Landfill Site

This study aims to analyze the effects of water temperature reduction at SUDOKWON Landfill Site via the Integrated Water Temperature Management System (“the System” hereafter) on biological leachate treatment. The effect of reduced water temperature of the leachate treatment with the System is compared with the effect of the unaltered temperature without the System. The analysis shows that the System lowered the temperature by 3.4^oC on average, ranging from 1.6 ~ 5.7^oC, resulting in the leachate treatment plant operating at the optimum temperature for biological process, which ranges from 33 ~ 38^oC. By lowering the water temperature, the System was able to retain the performance of the biological process to treat the increased COD and T-N loads and maintain the same leachate treatment efficiency ratio. In addition, the System prevented foam overflow in the operation of the biological process basin, which contributed to the increase in the quantity of leachate treatment, as it allowed the biological process to be stably operated from April to September. The results of this research show that the System can be a good alternative solution to other treatment plants suffering from reduced efficiency due to high temperatures in the biological process of leachate treatment.