SUSHILA AND PARVEEN KUMAR
Department of Basic and Applied Sciences, School of Engineering and Sciences, G. D. Goenka University, Sohna, Gurugram Road, Sohna-122 103 (Haryana), India
*(e-mail: parveenenv@gmail.com; Mobile: 99586 67162)
(Received: November 4, 2023; Accepted: January 10, 2024)
ABSTRACT
The present study was conducted to investigate the optimal parameters for electro-coagulation treatment of domestic wastewater. The laboratory scale experiments were carried out in batch mode using iron (Fe) electrodes and direct current at ambient conditions. The different factors were considered to assess the removal efficiency of COD, TSS and turbidity like, pH (5-9), treatment time (15-60 min), current density (0.2-0.8 mA/cm2) and NaCl dose (0.71-2.86 g/l). The optimal values of the influencing factors were obtained at a pH of 8, current density of 0.6 mA/cm2 (14 V), treatment time of 45 min and NaCl dose of 2.86 g/l. There was a positive relation between COD, TSS and turbidity removal efficiency from the wastewater and the pH in the range of 5-8. The removal efficiency of 85.7% COD, 90.8% of TSS and 96.6% of turbidity showed potential usefulness of the electro-coagulation process for remediation of pollutants from the domestic wastewater. The high efficacy of pollutants removal makes electro- coagulation process a suitable option for the domestic wastewater remediation.
Key words : Electro-coagulation, optimization studies, wastewater treatment, chemical oxygen demand, iron electrodes