Removal of color, COD and determination of power consumption from landfill leachate wastewater using an electrochemical advanced oxidation processes

摘要

The comparison of photo (UV), electro-Fenton and photo-electro-Fenton process on the removal of % color and chemical oxygen demand (COD) along with power consumption on landfill leachate wastewater was investigated. Experimental results showed that, the hybrid photo-electro-Fenton process yielded higher color (100%) and COD (97%) removal efficiencies with lower power consumption (3.10 kWhr/m(3)) than the photo and electro-Fenton processes alone. Effect of major operating parameters such as current density (0.07-0.35 A/dm(2)), solution pH (1.5-5), inter-electrode distance (0.75-3 cm), hydrogen per oxide (H2O2) concentration (75-450 mg/L), COD concentration (1000-5000 ppm) and UV power (8-32 W) on the % COD removal efficiency and power consumption of landfill leachate were investigated. The direct and alternating current photo-electro-Fenton process was studied and reported on the % COD removal and power consumption. The alternating current photo-electro-Fenton process is most suitable in comparison to the direct current photo-electro-Fenton process and can be applied effectively and efficiently for the removal of pollutant from wastewater.