Removal of Lignin from Wastewater through Electro-Coagulation

Ravi Shankar¹, Lovjeet Singh¹, Prasenjit Mondal^1, and Shri Chand¹

¹Department of Chemical Engineering, Indian Institute of Technology Roorkee, Uttarakhand, India

Cite this paper:
Ravi Shankar, Lovjeet Singh, Prasenjit Mondal and Shri Chand. Removal of Lignin from Wastewater through Electro-Coagulation. World Journal of Environmental Engineering. 2013; 1(2):16-20. doi: 10.12691/wjee-1-2-1

Abstract

The present work deals with the removal of lignin (expressed as COD removal) from synthetic wastewater through electro coagulation in a batch reactor using Aluminum as a sacrificial electrode. Effect of various parameters such as current density, pH, NaCl concentration and treatment time on the removal of COD from synthetic wastewater has been investigated to determine the most suitable process conditions for maximum removal of COD (lignin). A central composite design (CCD) has been used to design the experimental conditions for developing mathematical models to correlate the removal efficiency with the process variables. The most suitable conditions for the removal of lignin from synthetic solution were found to be as current density: 100A/m², pH: 7.6, NaCl concentration: 0.75mg/l and treatment time: 75min. The proposed model gives prediction on COD (lignin) removal with the error limit of around + 9 to - 7%.

Keywords:
electro coagulation lignin wastewater COD paper and pulp industry

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References:

[1]	Garg, A., Mishra, I.M., and Chand, S., “Catalytic wet oxidation of the pretreated synthetic pulp and paper mill effluent under moderate conditions”, Chemosphere, 66(9), 1799-1805. January 2007.
[2]	Garg, A., Mishra, I.M., and Chand, S., “Catalytic wet oxidation of the pretreated synthetic pulp and paper mill effluent under moderate conditions”, Chemosphere, 66(9), 1799-1805. January 2007.
[3]	Pokhrel, D. and Viraraghavan,T., “Treatment of pulp and paper mill wastewater—a review,” Science of the Total Environment, 333 (1-3). 37-58. October 2004.
[4]	Pokhrel, D. and Viraraghavan,T., “Treatment of pulp and paper mill wastewater—a review,” Science of the Total Environment, 333 (1-3). 37-58. October 2004.
[5]	Kindsigo, M. and Kallas, J., “Degradation of lignins by wet oxidation: model water solutions,” Proc. Estonian Acad. Sci. Chem., 55 (3). 132-144. 2006.
[6]	Kindsigo, M. and Kallas, J., “Degradation of lignins by wet oxidation: model water solutions,” Proc. Estonian Acad. Sci. Chem., 55 (3). 132-144. 2006.
[7]	Ceylan, Z., Cana, B.Z. and Kocakerim, M.M., “Boron removal from aqueous solutions by activated carbon impregnated with salicylic acid,” Journal of Hazardous Materials, 152(1). 415-422. March 2008.
[8]	Ceylan, Z., Cana, B.Z. and Kocakerim, M.M., “Boron removal from aqueous solutions by activated carbon impregnated with salicylic acid,” Journal of Hazardous Materials, 152(1). 415-422. March 2008.
[9]	Katal, R. and Pahlavanzadeh, H, “Influence of different combinations of aluminum and iron electrode on electro coagulation efficiency: Application to the treatment of paper mill wastewater,” Desalination, 265 (1-3). 199-205. January 2011.
[10]	Katal, R. and Pahlavanzadeh, H, “Influence of different combinations of aluminum and iron electrode on electro coagulation efficiency: Application to the treatment of paper mill wastewater,” Desalination, 265 (1-3). 199-205. January 2011.
[11]	Kalyani, K.S.P., Balasubramanian, N. and Srinivasakannan, C, “Decolorization and COD reduction of paper industrial effluent using electro-coagulation,” Chemical Engineering Journal, 151 (1-3). 97-104. August 2009.
[12]	Kalyani, K.S.P., Balasubramanian, N. and Srinivasakannan, C, “Decolorization and COD reduction of paper industrial effluent using electro-coagulation,” Chemical Engineering Journal, 151 (1-3). 97-104. August 2009.
[13]	Mahesh, S., Prasad, B., Mall, I.D., and Mishra, I.M., “Electrochemical Degradation of Pulp and Paper Mill Wastewater. Part 1. COD and Color Removal,” Industrial & Engineering Chemistry Research, 45 (8). 2830-2839. March 2006.
[14]	Mahesh, S., Prasad, B., Mall, I.D., and Mishra, I.M., “Electrochemical Degradation of Pulp and Paper Mill Wastewater. Part 1. COD and Color Removal,” Industrial & Engineering Chemistry Research, 45 (8). 2830-2839. March 2006.
[15]	Sridhar, R., Sivakumar, V., Immanuel, V.P., and Maran, J.P, “Treatment of pulp and paper industry bleaching effluent by electro-coagulant process,” Journal of Hazardous Materials, 186 (2-3), 1495-1502, February 2011.
[16]	Sridhar, R., Sivakumar, V., Immanuel, V.P., and Maran, J.P, “Treatment of pulp and paper industry bleaching effluent by electro-coagulant process,” Journal of Hazardous Materials, 186 (2-3), 1495-1502, February 2011.
[17]	Vepsalainen, M., “Removal of toxic pollutants from pulp mill effluents by electro coagulation,” Separation and Purification Technology, 81 (2). 141-150. September 2011.
[18]	Vepsalainen, M., “Removal of toxic pollutants from pulp mill effluents by electro coagulation,” Separation and Purification Technology, 81 (2). 141-150. September 2011.
[19]	Cleceri, L.S., Greenberg, A.E., and Eaton A.D, Standard methods for the examination of water and wastewater, American Public Health Association, USA, Washington DC, 1998, 20th ed.
[20]	Cleceri, L.S., Greenberg, A.E., and Eaton A.D, Standard methods for the examination of water and wastewater, American Public Health Association, USA, Washington DC, 1998, 20th ed.