Document Type : Research Paper


1 Department of Central Metallurgical Research and Development Institute (CMRDI), Cairo, Egypt.

2 Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Egypt.


A novel continuous electroflotation cell, about 0.6 liter volume capacity, using aluminum electrodes was designed for oil produced water treatment. The treating performance of a novel continuous electroflotation cell for oil produced water was investigated. The pH, current density, and feed water flow rate as affecting parameters of electroflotation process were studied. The results show that the removal efficiency decreased with increasing feed flow rate. However, it increased with increasing current density. The AC current was preferred because DC current causes passivation of the anode with time. The maximum removal for all types of pollutants is achieved at pH6. The designed electroflotation cell could remove different constituents of oil produced water with range 87.5 - 99.5 % at 25°C, 5V, pH7 and AC current density of 80A/m2 through a bipolar connection of the 8 electrodes with feed water flow rate of 60ml/min (3.6l/hr). The energy consumption was about 1.38Kwh/m3 and the operating cost (cost/m3) was about 0.3US$/m3 for the produced water treatment.


Main Subjects

[1]     Veil, J. A., Puder, M. G., Elcock, D., & Redweik Jr, R. J. (2004). A white paper describing produced water from production of crude oil, natural gas, and coal bed methane (No. ANL/EA/RP-112631). Argonne National Lab., IL (US).
[2]     Reynolds Rodney, R. (2003). Produced water and associated issues: A manual for independent operator. South-Midcontinent Region, PTTC
[3]     Arthur, J. D., Langhus, B. G., & Patel, C. (2005). Technical summary of oil & gas produced water treatment technologies. All Consulting, LLC, Tulsa, OK.
[4]     Lee, R., Seright, R., Hightower, M., Sattler, A., Cather, M., McPherson, B., ... & Whitworth, M. (2002, October). Strategies for produced water handling in New México. Proceedings of conference on ground water protection council produced water. 16-17. Boston, Massachsetts.
[5]     Knudsen, B. L., Hjelsvold, M., Frost, T. K., Svarstad, M. B. E., Grini, P. G., Willumsen, C. F., & Torvik, H. (2004, January). Meeting the zero discharge challenge for produced water. Proceedings of SPE international conference on health, safety, and environment in oil and gas exploration and production. Society of petroleum engineers.
[6]     Nandi, B. K., & Patel, S. (2013). Effects of operational parameters on the removal of brilliant green dye from aqueous solutions by electrocoagulation. Arabian Journal of Chemistry, 10, S2961-S2968.  
[7]     Chaturvedi, S. I. (2013). Electro-coagulation: a novel wastewater treatment method. International journal of modern engineering research3(1), 93-100.
[8]     Sahu, O., Mazumdar, B., & Chaudhari, P. K. (2014). Treatment of wastewater by electrocoagulation: a review. Environmental science and pollution research21(4), 2397-2413.
[9]     Holt, P. K., Barton, G. W., Wark, M., & Mitchell, C. A. (2002). A quantitative comparison between chemical dosing and electrocoagulation. Colloids and surfaces A: Physicochemical and engineering aspects211(2), 233-248.
[10] Al-abdalaali, A. A. (2010). Removal of boron from simulated iraqi surface water by electrocoagulation method. Academic scientific journals, 18(11), 1266-1284. 
[11] Comninellis, C., & Chen, G. (Eds.). (2010). Electrochemistry for the Environment (Vol. 2015). New York: Springer.
[12] Rice, E. W., Baird, R. B., Eaton, A. D., & Clesceri, L. S. (2012). Standard methods for the examination of water and wastewater. American public health association, american water works association, and water environment federation.
[13] Federation, W. E., & American Public Health Association. (2005). Standard methods for the examination of water and wastewater. American public health association (APHA): Washington, DC, USA.
[14] Kim, H. C., & Lee, K. (2009). Significant contribution of dissolved organic matter to seawater alkalinity. Geophysical research letters36(20).
[15] Selim, K.A., El-Hosiny, F.I., Abdel-Khalek, M.A., & Osama, I. (2017). Kinetics and Thermo-dynamics of Some Heavy Metals Removal from Industrial Effluents Through Electro-Flotation Process. Colloid and Surface Science, 2(2) 47-53.
[16] El-Hosiny, F. I., Abdel-Khalek, M. A., Selim, K. A., & Osama, I. (2017). Physicochemical study of dye removal using electro-coagulation-flotation process. Physicochemical problems of mineral processing, 54(1), 1-14.
[17] Parsa, J. B., Vahidian, H. R., Soleymani, A. R., & Abbasi, M. (2011). Removal of Acid Brown 14 in aqueous media by electrocoagulation: Optimization parameters and minimizing of energy consumption. Desalination278(1), 295-302.
[18] Jiang, J. Q., Graham, N., André, C., Kelsall, G. H., & Brandon, N. (2002). Laboratory study of electro-coagulation–flotation for water treatment. Water research36(16), 4064-4078.
[19] Mouedhen, G., Feki, M., Wery, M. D. P., & Ayedi, H. F. (2008). Behavior of aluminum electrodes in electrocoagulation process. Journal of hazardous materials150(1), 124-135.
[20] Holt, P. K., Barton, G. W., Wark, M., & Mitchell, C. A. (2002). A quantitative comparison between chemical dosing and electrocoagulation. Colloids and surfaces A: Physicochemical and engineering aspects211(2), 233-248.
[21] Kim, M. S., Dockko, S., Myung, G., & Kwak, D. H. (2015). Feasibility study of high-rate dissolved air flotation process for rapid wastewater treatment. Journal of water supply: Research and technology-aqua64(8), 927-936.
[22] Kwak, D. H., & Kim, M. S. (2013). Feasibility of carbon dioxide bubbles as a collector in flotation process for water treatment. Journal of water supply: Research and technology-aqua62(1), 52-65.
[23] Al-Qodah, Z., & Al-Shannag, M. (2017). Heavy metal ions removal from wastewater using electrocoagulation processes: A comprehensive review. Separation science and technology52(17), 2649-2676.
[24] Edzwald, J. K. (2010). Dissolved air flotation and me. Water research44(7), 2077-2106.
[25] Dalvand, A., Gholami, M., Joneidi, A., & Mahmoodi, N. M. (2011). Dye removal, energy consumption and operating cost of electrocoagulation of textile wastewater as a clean process. Clean–soil, air, water, 39(7), 665-672.
[26] Ghosh, D., Medhi, C. R., & Purkait, M. K. (2011). Techno-economic analysis for the electrocoagulation of fluoride-contaminated drinking water. Toxicological & environ chemistry93(3), 424-437.
[27] Zheng, T. (2017). Treatment of oilfield produced water with electrocoagulation: improving the process performance by using pulse current. Journal of water reuse and desalination7(3), 378-386.