Statistical optimization of chemical oxygen demand removal from wastewater by electrochemical oxidation

Dongseog Kim; Youngwoong Song; Youngseek Park

Korean Journal of Chemical Engineering, Vol.30, No.3, 664-670, March, 2013

DOI10.1007/s11814-012-0164-3 Export Citation

Statistical optimization of chemical oxygen demand removal from wastewater by electrochemical oxidation

Dongseog Kim, Youngwoong Song¹, and Youngseek Park^{2, †}

Department of Environmental Science, Catholic University of Daegu, Gyeongbuk 712-900, Korea
¹Department of Occupational Health, Catholic University of Daegu, Gyeongbuk 712-900, Korea
²Faculty of Liberal Education, Daegu University, Gyeongbuk 712-714, Korea

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The independent and combined effects of four variables (current density, electrolyte concentration, air flow rate and pH) on COD removal from wastewater by electrochemical oxidation were optimized using 24 full factorial experimental design. ANOVA was conducted to test the combined effects of the independent variables (the four control factors and time) on COD removal. To determine the reaction order of COD removal, 1st, 2nd or 3rd reaction orders were considered; 1st order kinetics showed the highest average r2 value. The backward elimination regression method was used to determine the 1st order kCOD equation, and main effects and 2-way interaction effects on the 1st order equation were investigated. Using this equation, kCOD values for the 16 experimental conditions were predicted and COD values were calculated with respect to time. Finally, we tried to determine optimal operating conditions using color and COD removal as endpoints using the multiple response surface method.

Keywords:Factorial Design;Reaction Rate Constant;COD Removal;Electrochemical Treatment;Multiple Response Surface Methodology

[References]

Ravikumar K, Ramalingam S, Krishman S, Balu K, Dyes Pigm., 70(1), 18 (2006)
Montgomery DC, Design and analysis of experiments, 6th Ed., Wiley, New York (1991)
Ahmadi M, Vahabzadeh F, Bonakdarpour B, Mofarrah E, Mehranian M, J. Hazard. Mater., B123, 187 (2005)
Arslan-Alaton I, Tureli G, Olmez-Hanci T, J. Photochem. Photobiol., A: Chem., 202, 142 (2009)
Annadurai G, Ling LY, Lee JF, J. Hazard. Mater., 151(1), 171 (2008)
Eaton A, Clesceri L, Greenberg A, Standard methods for examination of water and wastewater, 19th Ed., United Book Press, Maryland (1995)
Scott Fogler H, Elements of chemical reaction engineering, Prentice-Hall, Englewood Cliffs, New Jersey (1986)
Prasad RK, Srivastava SN, Chem. Eng. J., 146(1), 22 (2009)
Song Y, Kim D, Park Y, Korean J. Chem. Eng., 28(1), 156 (2011)
Myers R, Classical and modern regression with application, PWSKENT Publishing Company, Boston (1990)
Kim DS, Park YS, J. Env. Sci., 18(11), 1235 (2009)
Chen WS, Liang JS, J. Hazard. Mater., 161(2-3), 1017 (2009)
Sudoh M, Kitaguchi H, Koide K, J. Chem. Eng. Jpn., 18, 409 (1985)
Szpyrkowicz L, Juzzolino C, Kaul SN, Daniele S, De Faveri MD, Ind. Eng. Chem. Res., 39(9), 3241 (2000)
Myers R, Montgomery D, Response surface methodology, John Wiley & Sons (1995)

[Referenced By]

[1] Ravikumar K, Ramalingam S, Krishman S, Balu K, Dyes Pigm., 70(1), 18 (2006)

[2] Montgomery DC, Design and analysis of experiments, 6th Ed., Wiley, New York (1991)

[3] Ahmadi M, Vahabzadeh F, Bonakdarpour B, Mofarrah E, Mehranian M, J. Hazard. Mater., B123, 187 (2005)

[4] Arslan-Alaton I, Tureli G, Olmez-Hanci T, J. Photochem. Photobiol., A: Chem., 202, 142 (2009)

[5] Annadurai G, Ling LY, Lee JF, J. Hazard. Mater., 151(1), 171 (2008)

[6] Eaton A, Clesceri L, Greenberg A, Standard methods for examination of water and wastewater, 19th Ed., United Book Press, Maryland (1995)

[7] Scott Fogler H, Elements of chemical reaction engineering, Prentice-Hall, Englewood Cliffs, New Jersey (1986)

[8] Prasad RK, Srivastava SN, Chem. Eng. J., 146(1), 22 (2009)

[9] Song Y, Kim D, Park Y, Korean J. Chem. Eng., 28(1), 156 (2011)

[10] Myers R, Classical and modern regression with application, PWSKENT Publishing Company, Boston (1990)

[11] Kim DS, Park YS, J. Env. Sci., 18(11), 1235 (2009)

[12] Chen WS, Liang JS, J. Hazard. Mater., 161(2-3), 1017 (2009)

[13] Sudoh M, Kitaguchi H, Koide K, J. Chem. Eng. Jpn., 18, 409 (1985)

[14] Szpyrkowicz L, Juzzolino C, Kaul SN, Daniele S, De Faveri MD, Ind. Eng. Chem. Res., 39(9), 3241 (2000)

[15] Myers R, Montgomery D, Response surface methodology, John Wiley & Sons (1995)