IntroductionThe aliphatic and aromatic organic compounds present in ref-inery wastewater are a major source of aquatic environmentalpollution (Wake, 2005). The petroleum refineries use hugeamount of water in refining crude oil and subsequently gen-erate high volume of wastewater. Due to rapid increase indemand for oil worldwide, the wastewater effluent will conti-nue to rise and ultimately be discharged to main water sewer