Efficiency of Active Sludge Process Treatment of Petrochemical Industries Wastewater by Using of Biofilm (Case Study: Imam Khomeiny Port Petrochemical Complex)

Growth of petrochemical industries is caused increase producing of wastewater recently. This wastewater contains of various combinations and is a serious threat for environment. Effective treatment could be discovered coincidentally mentioned worries. So effective methods for treatment one essential active sludge processing in proper method. For kind of wastewater treatment that combination of the method with it، could be helped to omit affection contaminative measurement. In this research from active sludge processing and biofilm growth are used to treat wastewater simultaneously in petrochemical complex، Imam Khomeini port. The main goal is investigation of rate of efficiency promotion of active sludge processing in treatment of petrochemical wastewater in low temperature by usage of polyorethan foam in media clarified bond. The result showed that efficiency of active sludge processing in reducing COD with rate of %77 accompanied biofilm have increased. Also efficiency of active sludge has increased about %74. 3 for omitting N- NH4 from Imam Khomeini petrochemical wastewater generally. The result of this research showed that combination of active sludge process and usage of polyorethan foam media is an efficient and sure for treatment of Iran’s petrochemical wastewater even in low temperature، of course، this method is suggested in all petrochemical complexes of Iran especially in cold regions.