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DOI : 10.17640/KSWST.2020.28.3.31 ,    Vol.28, No.3, 31 ~ 39, 2020
Title
Effects of Boron Doped Diamond and Iridium Electrodes on the Removal of Contaminants in landfill leachate
박미정 Mi-jung Park , 이택순 Taek-soon Lee
Abstract
Electrochemical water treatment is a method of controlling organic pollutants and pathogenic microorganisms in water using an electrochemical oxidation reaction. Electrochemical oxidation is divided into two processes, indirect and direct oxidation, and the purpose of this study was to compare the removal efficiency of each. Chemical oxygen demand (COD), total nitrogen (T-N), and total phosphorus (T-P) removal rates of landfill leachate with a COD of 2,936 mg/L, T-N of 1757.3 mg/L, and T-P of 168.6 mg/L were compared using indirect and direct electrochemical oxidation processes. IrO₂/Ti electrodes were used for the indirect electrochemical oxidation process, and BDD electrodes were used for the direct electrochemical oxidation process. The electrochemical oxidation processes were tested with 2 L of wastewater at a temperature of 15°C. The current density was 500 A/m², the electrode spacing was 3 mm, and electrochemical oxidation was performed for 2 hours. Comparison of the direct and indirect oxidation processes yielded a COD higher than 98%, 92% or higher for T-N, and 99.5% or higher for T-P. However, the treatment time of the direct electrochemical oxidation process was shorter than that of the indirect process. The same current was applied to both processes, which implies the direct electrochemical oxidation removal efficiency is higher than that of the indirect process.
Key Words
BDD electrodes, Electrochemical water treatment, IrO2, Ti electrodes, Landfill leachate, BDD 전극, 전기화학적 수처리, IrO2, Ti 전극, 침출수
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