Abstract
This study elucidates the feasibility of electrochemical treatment as a water recycling process in the dissolved air flotation (DAF) unit in the food industry. Effects of operation parameters such as current density, electrolysis time, initial pH of effluent, and mixing process were investigated on the removal of COD, TSS, and TDS of the DAF pretreated effluent. An increase of current density enhances the removal rates and reduces the electrolysis time to reach the maximum performance. The initial pH less than 7 and the addition of mixing process were proven to increase the efficiency of EC treatment. About 80% of COD, 100% of TSS, and 60% of TDS were successfully removed at 500 mA current for 1 hour of electrolysis. The final treated effluent was found to meet the discharge standard from the US Environmental Protection Agency. It was concluded that EC process could be effective as an advanced water resourcing technology in the food industry.
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