Oil Refinery Wastewater Treatment by Advanced Oxidation Processes for Chemical Oxygen Demand Removal using the Box-Behnken Method

Document Type : Research Paper

Authors

Department of Chemical Engineering, Faculty of Energy, Kermanshah University of Technology, Kermanshah, Iran

Abstract

This study investigated the reduction of the chemical oxygen demand from the Kermanshah oil refinery wastewater using Fenton and Photo-Fenton processes. The study investigated the effects of operating variables such as ultraviolet light intensity in values of 0, 15, and 30 W, ferrous ion concentration in values of 10, 50, and 90 mg/l, hydrogen peroxide concentration in values of 100, 500 and, 900 mg/l, and treatment time in values of 30, 90, and 150 min on the reduction of the chemical oxygen demand percentage from this industrial wastewater. All the experiments were carried out in a glass reactor at a temperature of 25 ℃ under a stirrer speed of 350 rpm. Using the Box-Behnken experimental method, 27 experiments were performed randomly. Then, using the least-squares error method, an experimental quadratic model was achieved. Analysis of variance of the model showed that the proposed model had a high level of accuracy. Finally, we obtained the optimum conditions for maximizing the percentage of the chemical oxygen demand removal from the wastewater. The optimal conditions were Fe2+ concentration of 89.2 mg/l, H2O2 concentration of 119.9 mg/l, and treatment time of 135.9 min for the Fenton process. Also, these conditions were Fe2+ concentration of 35.1 mg/l, H2O2 concentration of 110.2 mg/l, treatment time of 92.8 min, and ultraviolet light intensity of 30 W, for the photo-Fenton process. Under these conditions, the percentage of chemical oxygen demand removal using the proposed model was 96.61 % and 92.82 % for the Fenton and photo-Fenton processes, respectively.

Keywords


[1] Bokare AD, Choi W. Review of iron-free Fenton-like systems for activating H2O2 in advanced oxidation processes. Journal of Hazardous Materials. 2014 Jun 30;275:121-35.
[2] Cortez S, Teixeira P, Oliveira R, Mota M. Fenton’s oxidation as post-treatment of a mature municipal landfill leachate.
[3] Iqbal M, Bhatti IA. Re-utilization option of industrial wastewater treated by advanced oxidation process. Pakistan Journal of Agriculture Sciences. 2014 Dec 1;51(4):1141-7.
[4] Chiou CS. Application of steel waste with UV/H2O2 to mineralize 2-naphthalenesulfonate in aqueous solution. Separation and purification technology. 2007 May 15;55(1):110-6.
[5] Primo O, Rivero MJ, Ortiz I. Photo-Fenton process as an efficient alternative to the treatment of landfill leachates. Journal of hazardous materials. 2008 May 1;153(1-2):834-42.
[6] Riga A, Soutsas K, Ntampegliotis K, Karayannis V, Papapolymerou G. Effect of system parameters and of inorganic salts on the decolorization and degradation of Procion H-exl dyes. Comparison of H2O2/UV, Fenton, UV/Fenton, TiO2/UV and TiO2/UV/H2O2 processes. Desalination. 2007 Jun 10;211(1-3):72-86.
[7] Bautista P, Mohedano AF, Casas JA, Zazo JA, Rodriguez JJ. An overview of the application of Fenton oxidation to industrial wastewaters treatment. Journal of Chemical Technology & Biotechnology: International Research in Process, Environmental & Clean Technology. 2008 Oct;83(10):1323-38.
[8] Meriç S, Kaptan D, Ölmez T. Color and COD removal from wastewater containing Reactive Black 5 using Fenton’s oxidation process. Chemosphere. 2004 Jan 1;54(3):435-41.
[9] Arslan-Alaton I, Tureli G, Olmez-Hanci T. Treatment of azo dye production wastewaters using Photo-Fenton-like advanced oxidation processes: Optimization by response surface methodology. Journal of photochemistry and Photobiology A: Chemistry. 2009 Feb 25;202(2-3):142-53.
[10] Aziz AA, Daud WM. Oxidative mineralisation of petroleum refinery effluent using Fenton-like process. Chemical engineering research and design. 2012 Feb 1;90(2):298-307.
[11] Hermosilla D, Cortijo M, Huang CP. Optimizing the treatment of landfill leachate by conventional Fenton and photo-Fenton processes. Science of the Total Environment. 2009 May 15;407(11):3473-81.
[12] Rezaei R, Mohadesi M, Moradi GR. Optimization of biodiesel production using waste mussel shell catalyst. Fuel. 2013 Jul 1;109:534-41.
[13] Ferreira SC, Bruns RE, Ferreira HS, Matos GD, David JM, Brandao GC, da Silva EP, Portugal LA, Dos Reis PS, Souza AS, Dos Santos WN. Box-Behnken design: an alternative for the optimization of analytical methods. Analytica chimica acta. 2007 Aug 10;597(2):179-86.
[14] Federation WE, American Public Health Association. Standard methods for the examination of water and wastewater. American Public Health Association (APHA): Washington, DC, USA. 2005.
[15] El-sousy K. Elimination of organic pollutants using supported catalysts with hydrogen peroxide.
[16] Ferreira SC, Bruns RE, Ferreira HS, Matos GD, David JM, Brandao GC, da Silva EP, Portugal LA, Dos Reis PS, Souza AS, Dos Santos WN. Box-Behnken design: an alternative for the optimization of analytical methods. Analytica chimica acta. 2007 Aug 10;597(2):179-86.
[17] Montgomery DC. Design and analysis of experiments. John Wiley & Sons. Inc., New York. 2001;1997:200-1.
[18] Çatalkaya EÇ, Şengül F. Application of Box–Wilson experimental design method for the photodegradation of bakery's yeast industry with UV/H2O2 and UV/H2O2/Fe (II) process. Journal of hazardous materials. 2006 Feb 6;128(2-3):201-7.
[19] Liou MJ, Lu MC, Chen JN. Oxidation of explosives by Fenton and photo-Fenton processes. Water Research. 2003 Jul 1;37(13):3172-9.
[20] Nitoi I, Oncescu T, Oancea P. Mechanism and kinetic study for the degradation of lindane by photo-Fenton process. Journal of Industrial and Engineering Chemistry. 2013 Jan 25;19(1):305-9.