Abstract
A petrochemical plant in Malaysia released Ammonia-nitrogen contamination beyond the allowable standard limit. It is Standard B, based on Environment Quality Act (EQA) 1974, to uphold the integrity of discharged water. Extended aeration activated sludge process (ASP) was proposed to treat Ammonia-nitrogen contamination in this study. Aligned objectives are to determine the impact of treating wastewater generated from the petrochemical plant using bench scale extended aeration activated sludge system at 20 percent of contamination, diluted with domestic wastewater of an average of 500 mg/L chemical oxygen demand concentration. Bench scale ASP was set up using 5000 mg/L initial biomass, a 20 liters’ influent tank with a heavy-duty mixer, connected to a pump via 10 mm tube at 0.1 rpm which is equivalent to 5 liters of water infused into the aeration tank for 24 hours consistently, and finally discharged into an effluent tank. Influent and effluent samples were monitored for Nitrate (NO3-1), Ammonia (NH3), and Total Phosphorus (PO43-).
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