Wastewater Treatment on Paper & Pulp Industry by Electro-Coagulation

The study analysed how operating parameters like initial pH, TDS, EC, BOD, COD, and electrolyte concentration affect colour removal and energy use. Findings showed that colour removal improved with longer electrolysis time, higher current density, increased sodium chloride concentration, and the use of multiple electrodes. The best results were achieved at an initial pH of 6.5–8.5, 120 minutes of operation, a current density of 61.8, and specific anode-cathode arrangements. The results confirmed that electrocoagulation is more effective than adsorption for treating paper and pulp wastewater, as evidenced by the significant colour change after treatment. Key Words: Electrocoagulation, wastewater treatment, effluent, BOD reduction