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Efficacy of Fenton Based Electrochemical Treatment in Rotating Disc Electrode Reactor for the Removal of Total Organic Carbon (TOC) from Pharmaceutical Wastewater through Different Modes

Kavitha Nagarasampatti Palani*, Balasubramanian N, Asha Mathew, Jhanani Karunagaran

The pharmaceutical effluent was remediated by employing batch and Batch Recirculation (BR) of fenton, Electro Oxidation (EO) and Electro Fenton (EF) processes to detach the organic compounds from the pharmaceutical wastewater using rotating disc reactor. Synthetic wastewater was modelled with Total Organic Carbon (TOC) of 298 mg/L. EF process showed enhanced results which could be attributed to the generation of large amount of hydroxyl radicals by which the generation of ferrous ions by the reduction of ferric ions reacted with hydrogen peroxide along with the anode. The optimum conditions for EF process were Fe²⁺=0.2 g/L, H₂O₂=0.9 mM, Current Density (CD)=15 mA/cm², rpm=500 rpm, pH=3.5 and Fe²+=0.2 g/L, H₂O₂=0.9 mM, CD=10 mM/cm², pH=3.5, rpm=500, flow rate=60 L/h for batch and for BR mode. This study shows outstanding results for EF process than Electro Oxidation (EO) and fenton process for the pharmaceutical effluent treatment.