Electrochemical Removal of COD from Effluents

Document Type : Research Paper


1 Associate Professor of Environmental Health, Department of Public Health, Hamedan University of Medical Sciences

2 Assistant Professor of Environmental Health, Department of Public Health, Hamedan University of Medical Sciences


This study aims to conduct an experimental investigation of treating effluents using the electrochemical method. Removal of COD from effluents was investigated at different electric currents, different electrodes (Al, Fe and Stainless steel), and various electrolysis times. The experimental results show that removal efficiency depends on electrolysis time, type of electrode, and the current applied. From the experiments carried out at 30V, it was found that the efficiency of COD removal over an electrolysis time of 60 minutes was 74% for Al and Fe and 53% for Stainlss steel.


1- Muna Ali, T. R. (2001). “Aquatic toxicity from pulp and paper mill effluents: A review.” Advances in Environmental Research, 5, 175-196.
2- Gurses, A., Yalc‎n, M., and Doar, C. (2002). “Electro coagulation of some reactive dyes: A statistical investigation of some electrochemical variables.” Waste Management, 22, 491-499.
3- Clark, T., Bruce, M., and Anderson, S. (1994). “Decolarization of extraction stage bleach plant effluent by combined hypochlorite oxidation and anaerobic treatment.” Water Sci. Tech., 29(5-6), 421-432.
4- Frostell, B., Boman, B., Ek, M., Palvall, B., Berglund, M., and Lindstroem, A. (1994). “Influence of bleaching conditions and membrane filtration on pilot scale biological treatment of kraft mill bleach effluent.” Water Sci. Tech., 29(5-6), 163- 176.
5- Streat, M., Patrick, J. W., and Camporro Perez, M. J. (1995). “Sorption of phenol and chlorophenol from water using conventional and novel activated carbons.” Water Res., 29 (2), 467-472.
6- Diez, M. C., Mora, M. L., and Videla, S. (1999). “Adsorption of phenolic compounds and color from bleached Kraft mill effluent allophonic compounds.” Water Res., 33(1), 125-130.
7- Panizzo, M., Bocca, C., and Cerisola, G. (2000). “Electrochemical treatment of wastewater containing polyaromatic organic pollutants.” Water Res., 34(9), 2601-2605.
8- Lin, S. H., Shyu, C. T., and Sun, M. C. (1998). “Saline wastewater treatment by electrochemical method.” Water Res., 32 (4), 1059-1066.
9- Lin, S. H., and Peng, C. F. (1996). “Continuous treatment of textile wastewater by combined coagulation, electrochemical oxidation and activated sludge.” Water Res., 30 (3), 587-592.
10- Tsai, C. T., Lin, S. T., Shue, Y. C. and Su, P. L. (1997). “Electrolysis of soluble organic matter in leachate from landfills.” Water Res., 31 (12), 3073-3081.
11-Weerachai, P., Sombat, C., and Duang, B. (2000). “Electrocoagulation and subsequent recovery of phenolic compounds.” Analytical Sciences, 16, 1083-1084.
12- Daneshvar, N., Ashassi Sorkhabi, H., and Tizpar, A. (2003). “Decolorization of orange 11 by electrocoagulation method.” Separation and Purification Tech., 31, 153-162.
13- Findlay, G. E., Darryl, L. F., and Jesse, V. L. (2006). “Electrolytic treatment of an industrial wastewater from a hosiery plant.” Water Environmental Research, 78(4), 435-441.
14- Worlds greatest encyclodictionamana capedia (2006). “Electrolysis.” <http://www.answers.com/topic/electrolysis> (Jan. 5, 2006).
15- Tarr, M. A. (2003). Chemical degradation methods for waste & pollutants, environmental & industrial application, Marcel Dekker, New York, 235-295.
16- موسویان، س. م., و رضایی، ع. (1383). تصفیه فاضلاب آلوده حاوی رنگ زیاد صنایع به روش تلفیقی الکتروشیمیایی _ تابش اشعه گاما. مجموعه مقالات چهارمین همایش سراسری بهداشت حرفه ای ایران, 355-360.
17- ربانی، د. (1382). کاربرد توأم انرژی خورشیدی فرآیند الکتروشیمیایی و سیکل مرطوب سازی_ رطوبت زدایی در تصفیه پیشرفته فاضلاب.پایان نامه دکترا (بهداشت محیط), دانشگاه تربیت مدرس، تهران.
18- Daneshvar, N., Ashassi Sorkhabi, H., and Kasiri, B. (2004). “Decolorization of dye solution containing acid red 14 by electrocoagulation with a comparative investigation of different electrodes connection.” J. Hazardous Material, 112 (1-2), 55-62.
19- Rahmani, A. R., Jonidi Jafari, A., and Mahvi, A. H. (2005). “Investigation of water disinfection by electrolysis.” Pakistan J. of Biological Sciences, 8(6), 910-913.
20- Clesceria, L. S., Greenberg, A. E., and Eaton, A. D., eds. (1998). Standard methods for the examination of water and wastewater, APHA, WEF, AWWA, 20th Ed., Washington, D.C.
21-Can, O. T., Bayramoglu, M., and Kobya, M. (2003). “Decolorization of reactive dye solutions by electrocoagulation using aluminum electrodes.” Ind. Eng. Chem. Res., 42, 3391-3396.
22- Buso, A., Giomo, M., Boaretto, L., Sandona, G., and Paratella, A. (1997). “New electrochemical reactor for wastewater treatment: electrochemical characterization.” Chemical Engineering Processing, 36, 255-260.
23- Utveren, U. B., and Koparal, S. (1994). “Color removal from textile effluents by electrochemical destruction.” J. Environ. Sci. Health, A29 (1), 1-16.
24- Xiong, Y., and Karlsson, H. T. (2002). “An experimental investigation of chemical oxygen demand removal from the wastewater containing oxalic acid using three-phase three-dimensional electrode reactor.” Advances in Environmental Research, 7, 139-145.
25- Shin, S. H., Kim, Y. H., Jung, S. K., Suh, K. H., Kang, S. G., Jeong, S. K., and Kim, H. G. (2004). “Combined performance of electrocoagulation and magnetic separation processes for treatment of dye wastewater.” Korean J. Chem. Eng., 21(4), 806-810.