Petroleum refinery effluents (PRE) are wastes originating from industries engaged in refining crude oil and manufacturing lubricants, fuels and petrochemical intermediates. The effluents are composed of oil and grease along with many other toxic organic compounds and are a major source of aquatic environmental pollution. PRE can vary greatly depending on the plant configuration, the type of oil being processed, and operation procedures (Saien J. and Nejati H., 2007). The exact composition cannot