COD Reduction in Effluent from Southern Pars Gas Refinery Using Electrocoagulation

Document Type : Research Paper

Authors

1 Assoc. Prof., Dept. of Hydraulic and Environmental Eng., School of Civil Eng., Iran Uni. of Sciences and Tech., Tehran

2 M.Sc. of Environmental Eng., School of Civil Eng., Iran University of Science and Tech., Tehran

Abstract

The present paper investigates the feasibility of treating the effluent from Southern Pars Gas Refinery by electrocoagulation using aluminum electrodes. Al3+ species and hydrogen ions have been shown to evolve at both Al-based cathode and anode. In this study, the effects of such operating parameters as pH, Na2SO4, poly aluminum chloride dosage, and current density on organic pollutant and COD removals have been studied. The optimum operating range for each operating variable was experimentally determined. Based on the results, organic pollutants and COD removal rates showed to increase by increasing current density, poly aluminum chloride, and Na2SO4.The highest removal efficiency was achieved at pH 7. Results also revealed that more than 95% of the COD was removed when the effluent was treated for 90 min at a current density of 40 mAcm-2.  Power consumption for this removal level was measured to be 19/48 kwh per kg COD removal.

Keywords

References

1- Rajkumar, D., and Palanivelu, K. (2004). “Elctrochemical treatment of industrial wastewater.” J. Hazard. Mater., 113 (1-3), 123-129.
2- Zouboulis, A.I., and Avranas, A. (2000). “Treatment of oil-in-water emulsions by coagulation and dissolved-air flotation.” Colloid Surface., 172 (1-3), 153-161.
3- Saien, J., and Nejati, H. (2007). “Enhanced photocatalytic degradation of pollutants in petroleum refinery wastewater under mild conditions.” J. Hazard. Mater., 148 (1-2), 491-495 .
4- Koh, S.M., and Dixon, J.B. (2001). “Preparation and application of organo-minerals as sorbents of phenol, benzene and toluene. ” Appl. Clay Sci., 18 (3-4), 111-122
5- Rebhun, M., Kalabo ,R., Grossman, L., Manka, J., and Rav-Acha ,C.( 1992). “Sorption of organics on clay and synthetic humic-clay complexes simulating aquifer processes.” Water Res., 26 (1), 79-84.
6- Demirci, S., and Erdogan, B.R.( 1998). “Wastewater treatment at the petroleum refinery, Kirikkale, Turkey using some coagulants and Turkish clays as coagulant aids.” Water Res., 32 (11), 3495-3499
7- Cheryan, M., and Rajagopalan, N. (1998). “Membrane processing of oily streams, wastewater treatment and waste reduction.” J. Membrane Sci., 151 (1), 13-28.
8- Campos, J.C., Borges, R.M.H., Oliveira Filho, A.M., Nobrega, R., and Sant’Anna Jr. G.L. (2002). “Oilfield wastewater treatment by combined microfiltration and biological processes.” Water Res., 36 (1), 95-104.
9- Masschelein, W. J., and Rice, R.J. (2002). Ultraviolet light in water and wastewater sanitation, Lewis Publishers, In R. G. Rice (ed.), Paris.
10- Chen, X., Chen, G., and Yue, P.L. (2000). “Separation of pollutants from restaurant wastewater by electrocoagulation.” Sep. Purif. Technol., 19 (1-2), 65-76.
11- Stephenson, R., and Tennant, B. (2003). “New electrocoagulation process treats emulsified oily wastewater at Vancouver Shipyards.” Environmental Science and Engineering Magazine, World Wide Web site, <www.esemag.com.> (Aug. 7, 2009).
12- Chen, G. (2004). “Electrochemical technologies in wastewater treatment.” Sep. Purif. Technol., 38 (1),
11-41.
13- Stuart, F.E. (1946). “Electronic water purification progress report on the electronic coagulator-a new device which gives promise of unusually speedy and effective results.” Water and Sewage., 84, 24-26.
14- Bonilla, C.F. (1947). “Possibilities of the electronic coagulator for water treatment.” Water and Sewage., 85,
21-45.
15- Kobya, M., Hiz, H., Senturk, E., Aydiner, C., and Demirbas, E. (2006). “Treatment of potato chips manufacturing wastewater by electrocoagulation.” Desalination, 190 (1-3), 201-211.
16- Escobar, C., Soto-Salazar, C., and Ines Toral, M. (2006). “Optimization of the electrocoagulation process for the removal of copper, Lead and cadmium in the natural waste waters and simulated wastewater.” J. Environ. Manage., 81 (4), 381-391.
17- Bensadok, K., Benammar, S., Lapicque, F., and Nezzal, G. (2008). “Electrocoagulation of cutting oil emulsions using aluminium plate electrodes.” J. Hazard. Mater., 152 (1), 423-43.
18- Daneshvar, N., Oladegaragoze, A., and Jafarzadeh, N. (2006). “Decolorization of basic dye solutions by electrocoagulation: an investigation of the effect of operational parameters.” J. Hazard. Mater., 129 (1-3), 116-122.
19- Sengil, A., and Ozacar, M. (2006). “Treatment of dairy wastewaters, by electrocoagulation using mild steel electrodes . J. Hazard. Mater., 137 (2), 1197-1205.
20- Yavuz, Y. (2007). “EC and EF processes for the treatment of alcohol distillery wastewater.” Sep. Purif. Technol., 53 (1), 135-140.
21- Ogutveren, U.B., Gonen, N., and Koparal, S. (1992). “Removal of dye stuffs from wastewater electrocoagulation of acilan blau using soluble anode.” J. Environ. Sci. Heal. A., 27 (5), 1237-1247.
22- Tezcan, U., Ugur, S., Koparal, A.S., and Bakır Ogutveren, U. (2006).”Electrocoagulation of olive mill wastewaters.” Sep. Purif. Technol., 52(1), 136-141.
23- رحمانی، ع.ر.، و سمرقندی، م.ر. (1388). ”کارایی روش الکتروکواگولاسیون در حذف رنگ اریوکروم بلاک تی از پساب. “ مجله آب و فاضلاب، 69، 52-58.
24-Daneshvar,N.,Ashassi-sorkhabi, H.,and Tizpar, A.(2003). “Decolorization of orange 11 by electrocoagulation method.” Sep. Purif. Technol., 31 (2), 153-162.
25- Gomes, J.A.G., Daida, P., Kesmez, M., Weir, M., Moreno, H., Parga, J.R., Irwin, G., McWhinney, H., Grady, T., Peterson, E., and Cocke, D.L. (2007). “Arsenic removal by electrocoagulation using combined Al-Fe electrode system and characterization of products.” J. Hazard. Mater., 139 (2), 220-231.
26- Song, S., Yao, J., He, Z., Qiu, J., and Chen, J.(2008). “ Effect of operational parameters on the decolorization of C.I. Reactive blue 19 in aqueous solution by ozoneenhanced electrocoagulation.” J. Hazard. Mater., 152 (1), 204-210.
27- Can, O.T., Kobya, M., Demirbas, E., and Bayramoglu, M.( 2006). “Treatment of the textile wastewater by combined electrocoagulation.” Chemosphere, 62 (2), 181-187.
28- Yildiz, Y.S., Koparal, A.S., Irdemez, Sx., and Keskinler, B.(2007). “Electrocoagulation of synthetically prepared waters containing high concentration of NOM using iron cast electrodes.” J. Hazard. Mater., 139 (2), 373-380.
29- شرایط عمومی تعرفه‌های برق جمهوری اسلامی ایران (1388). انتشارات وزارت نیرو، تهران.
Journal of Water and Wastewater; Ab va Fazilab ( in persian )
Volume 21, Issue 1 - Serial Number 1
Serial number:73
March and April 2010
Pages 40-48

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