Abstract
The present study aims to evaluate the efficacy of the electro-oxidation (EO) process using graphite and stainless steel electrode for the primary treatment of leachate generated from the industrial waste landfill site. Response surface methodology (RSM) was used to optimise process variables, viz., initial pH, current density, and electrolysis time to obtain maximum COD removal. The optimum 30 mA/cm2 current density, initial pH 7 and 35 min electrolysis time with graphite cathode showed 89.53 % COD removal. While stainless steel cathode showed 75.30 % COD removal with 19.70 mA/cm2 current density, initial pH 5.5, and 174-min electrolysis time as suggested optimum conditions. The results indicated that the graphite cathode improved EO performance compared to stainless steel.
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