Treatment of Dairy Industry Wastewater using Electrocoagulation Technique

The cost-effective treatment of dairy industry wastewater for environmental protection is a challenging task. In view of this present study was undertaken to investigate the feasibility of electrocoagulation technology for dairy wastewater treatment. The batch experiments were conducted in electrocoagulation (EC) unit of 1.5L capacity with aluminum electrodes connected in monopolar parallel system. The operating parameters such as pH, applied voltage and electrolysis time were used for the investigation with emphasis on chemical oxygen demand (COD) and turbidity during the study it was found that 98.75% COD and 97.82% turbidity can be removed with vary short electrolysis duration of 10 minutes at applied voltage of 7V and pH 6. Thus COD was reduced from 8000mg/L to 100mg/L; and turbidity reduced to 8NTU from 367.1NTU, with specific electric energy consumption of 0.00011 kWh/kg COD. Hence it can be concluded that EC process could be feasible alternative for dairy wastewater treatment. Keywords— Electrocoagulation, dairy industry wastewater, Electrolysis time(ET), voltage, Chemical Oxygen Demand (COD), turbidity.

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