Experimental Study and Adsorption Modeling of COD Reduction by Activated Carbon for Wastewater Treatment of Oil Refinery

Document Type: Research Article

Authors

School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, I.R. IRAN

Abstract

Application of Granular Activated Carbon (GAC) in adsorption process has been studied for the advanced treatment of municipal and industrial wastewater. Because of entering poisonous compounds such as furfural, phenol and sulfides into the oily wastewater of Tehran refinery, biological aeration basins of wastewater treatment unit may not have the desired performance of COD reduction. In this study, GAC is examined for reduction of COD effluent from the Dissolved Air Flotation (DAF) unit to achieve to the environmental and design regulations.The equilibrium batch experiments as well as dynamic adsorption tests were performed to determine the maximum adsorption capacity and the breakthrough curves of COD, respectively. The data derived from equilibrium studies were modeled using Langmuir theory and the isotherm parameters were determined at two different temperatures of 25 and 40 C. Dynamic adsorption modeling was carried out considering the axial dispersion model in the bed of GAC with the assumption of lump kinetic mass transfer and linear driving force into the solid phase. The model results of COD breakthrough curve concentration have shown a fairly good agreement with experimental results. The sensitivity analysis of the dynamic model was carried out at different temperatures, bed lengths, feed flow rate and feed concentration to have a proper insight for appropriate design of a GAC fixed bed.It is concluded that GAC fixed bed could be an auxiliary unit for biological treatment of wastewater to overcome the problems of biological basin in oil refineries.

Keywords

Main Subjects


[1] Muftan H. El-Naas , Sulaiman Al-Zuhair, Alhaji M., Reduction of COD in Refinery Wastewater Through Adsorption on Date-pit Activated Carbon, J. Hazard. Mater., 173(1-3), p. 750 (2010).

[2] Malik L. Hami, M.A. Al-Hashimib, M.M. Al-Doori, Effect of Activated Carbon on BOD and COD Removal in a Dissolved Air Flotation Unit Treating Refinery Wastewater, Desalination, 216(1–3), p. 116 (2007).

[3]   Bansodea R.R., Lossoa J.N., Marshallb W.E., Rao R.M., Portiere R.J., Pecan Shell-Based Granular Activated Carbon for Treatment of Chemical Oxygen Demand (COD) in Municipal Wastewater, Bioresour. Technol., 94, p. 129 (2004).

[4] Pant D., Adholeya A., Biological Approaches for Treatment of Distillery Wastewater: A Review,Bioresour. Technol., 98(12), p. 2321 (2007).

[5] Galil N., Rebhun M., Brayer Y., Disturbance and Inhibition in Biological Treatment of Wastewater from an Integrated Refinery, Wat. Sci.Tech., 20(10), p. 21 (1998).

[6] Esfehani M.M., Ahangar K. R., Evaluation of Granular Activated Carbon Performance on MTBE Removal from Polluted Well Water by Both RESSCT and Pilot Plant Methods, Petrol. Research, 18(58), p. 71 (2009).

[7] Tony M.A, Purcell P.J, Zhao Y., Oil Refinery Wastewater Treatment Using Physicochemical, Fenton and Photo-Fenton Oxidation Processes, J. Environ. Sci. Health., 47(3), p. 435 (2012).

[8] Galambos I.I., Molina J.M., Jaray P., Vatai G., Molnar E.B., High Organic Content Industrial Waste Water Teatment by Membrane Filtration, Desalination, 162, p. 117 (2000).

[9] Hassani A.H., Salehi S.B., Borghei M., Siavashani B. Oragnic Removal Efficiency of the Nanofiltration and Adsorption Hybrid System in High Strength Waste Water, Water & Waste., 22 (1 (77)), p. 42 (2011).

[10] O.Cooney, David," Adsorption Design for Waste Water Treatment", Lewis Publishers, Boca , Raton, Fl (1999).

[11] King S., "Small quantity Generator Oily Waste Water Management study", Publication Number SQG-RR-3 (10/95), Seattle, Wash. (1995).

[12] "Operating Manual of Water Recovery Facilities at National Iranian of Tehran Refinery Oil Company", Plant 23, Fluor -Thyssen Joint Venture (1997).

[13] Chen D.Z.,Zhang J.X.,Chen J.M Adsorption of Methyle Tert-butyl Ether Using GAC: Equilibrium and Kinetic Analysis, Int. J. Env. Sci. Tech., 26, p. 235 (2010).

[14] Mahdavi M.S., Ganjidoust H., Usage of Natural Adsorbents for COD Removal of Industrial Wood Fiber Wasterwater, J. Eev. Studies, 34(48), 41 (2009).

[15] Rao R.A.K.,Ikram S.,Ahmad J. Adsorption of Pb(II) on a Composite Material Prepared from Polystyrene-Alumina and activated Carbon: Kinetic and Thermodynamic Studies, J. Iran. Chem. Society, 8(4), p. 931 (2011).

[16]Ademiluyi F.T., Amadi S.A., Amakama, Nimisingha J. Adsorption and Treatment of Organic Contaminants using Activated Carbon from Waste Nigerian Bamboo, J. Appl. Sci. Env. Manage., 13(3), p. 39 (2009).

[17] Yang R.T., "Gas Separation by Adsorption Process", Butterworth Stoneham, (1987).

[18] Sircar S., Hufton JR., Why Does the Linear Driving Force Model for Adsorption Kinetics Work, Adsorption, 6, p. 137 (2006).