COD and Color Removal From Landfill Leachate by Photo-Electro Process

Abstract

This study investigated the effects of operational parameters such as pH (2.5-5.0), current density (1050 A/m(2)), H2O2 concentration (250-1500 mg/ L) and distance between electrodes (1.0-1.5 cm) on COD and color removal from the leachate by the photo-electro-Fenton method. Under determined optimum experimental conditions (pH: 3, current density: 10 A/m(2), H2O2: 1000 mg/L, UV lamp: 16W, stirring rate: 250 rpm, distance between electrodes: 1.0 cm), maximum 83.84% COD removal and 84.46% color removal from leachate were achieved with an electrical energy consumption of 11.02 and 5.51 kWh/m(3), respectively. Maximum removal efficiencies for COD and color were reached after 90 and 45 minutes of treatment, respectively.