Oil Reduction from Durah Wastewater Treatment Plant using Two Types of Coagulants

Abstract

The Durah Oil Company represents one of the important companies in Iraq that consumes a large quantity of water. The refinery wastewater discharged from the company is evaluated to be 60 m³/hr, which causes high water pollution to Tiger river and the agricultural lands. The basic aim of this investigation is to modify the methods for treating oily wastewater. Measurements of wastewater such as turbidity, pH, and TDS, COD, TH and oil quantity were achieved during period four months. Two coagulants were used in this experiments including Alum and mixture of Bentonite and Kaolin, the optimum alum dosages are (20, 40 and 80 ppm) and clay dosage is (2.5, 5, and 9 g/l) are required to treat wastewater for initial oil concentration (20, 40, and 136 ppm) respectively.

Keywords: Refinery wastewater, oil removal , Coagulant, Bentonite, Kaolin