Combined Performance of Electrocoagulation and Magnetic Separation Processes for Treatment of Dye Wastewater

Su-Hee Shin; Yong-Ha Kim; Su-Kyong Jung; Kuen-Hack Suh; Shin-Gyung Kang; Sun-Kwang Jeong; Hang-Goo Kim

Korean Journal of Chemical Engineering, Vol.21, No.4, 806-810, July, 2004

DOI10.1007/BF02705524 Export Citation

Combined Performance of Electrocoagulation and Magnetic Separation Processes for Treatment of Dye Wastewater

Su-Hee Shin, Yong-Ha Kim^†, Su-Kyong Jung, Kuen-Hack Suh , Shin-Gyung Kang¹, Sun-Kwang Jeong², and Hang-Goo Kim²

Department of Chemical Engineering, Pukyong National University, Pusan 608-739, Korea
¹Environmental Conservation Research Team, Research Institute of Industrial Science and Technology, Kwangyang 545-090, Korea
²Fluidized-bed Reduction Team, FINEX R&D Project Dept., POSCO, Pohang 790-330, Korea

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In this study, a combined system of electrocoagulation (EC) and magnetic separation (MS) has been applied to the treatment of dye wastewater, and its performance has been evaluated. The flocs formed in the electrocoagulation using Fe anode are magnetized and thus they could be removed by magnetic separation. The removal of suspended solids, color and COD was improved with an increase in electric current up to about 15 A and with a decrease in liquid velocities in EC. While the remaining suspended solids in the treated water were reduced to a few ppm and the color was removed almost perfectly (Max. 96%), that of COD was relatively low and only 81%. A further powerful operation can be expected from the present system if it is combined with an additional process, such as electrolysis or oxidation, to reduce COD more efficiently.

Keywords:Electrocoagulation;Magnetic Separation;Wastewater;Flocs;Magnetization

[References]

Barrera-Diaz C, Urena-Nunez F, Campos E, Palomar-Pardave M, Remero-Romo M, Radiat. Phys. Chem., 67, 657 (2003)
Bejankiwar RS, Water Res., 36, 4386 (2002)
Chen X, Chen G, Yue PL, Sep. Purif. Technol., 19, 65 (2000)
Kim TH, Park C, Lee G, Lee J, Shin EB, Kim S, Theor. Appl. Chem. Eng., 6, 3909 (2000)
Kim TH, Park C, Lee J, Shin EB, Kim S, Water Res., 36, 3979 (2002)
Kim YH, Shin SH, Suh KH, Kim HG, "Combined Process of Electrocoagulation and Magnetic Fluid Separation: Application to the Removal of Contaminants from Dye Wastewater," in Proceedings of the 7th Asian Conference on Fluidized-Bed and Three-Phase Reactors, Hamanako, Shizuoka-Ken, Japan, 373 (2000)
Mills D, J. Am. Water Works Assoc., 92, 34 (2000)
Mollah MYA, Schennach R, Parga JR, Cocke DL, J. Hazard. Mater., B84, 29 (2001)
Shaikh AMH, Dixit SG, Water Res., 26, 845 (1992)
Tsouris C, DePaoli DW, Shor JT, Hu MZC, Ying TY, Colloids Surf. A: Physicochem. Eng. Asp., 177, 223 (2001)
Wang Y, Forssberg E, Miner. Metallurgical Process., 11, 87 (1994)
Wu Z, Cong Y, Zhou M, Ye Q, Tan T, Korean J. Chem. Eng., 19(5), 866 (2002)

[Referenced By]

[Related Articles]

[1] Barrera-Diaz C, Urena-Nunez F, Campos E, Palomar-Pardave M, Remero-Romo M, Radiat. Phys. Chem., 67, 657 (2003)

[2] Bejankiwar RS, Water Res., 36, 4386 (2002)

[3] Chen X, Chen G, Yue PL, Sep. Purif. Technol., 19, 65 (2000)

[4] Kim TH, Park C, Lee G, Lee J, Shin EB, Kim S, Theor. Appl. Chem. Eng., 6, 3909 (2000)

[5] Kim TH, Park C, Lee J, Shin EB, Kim S, Water Res., 36, 3979 (2002)

[6] Kim YH, Shin SH, Suh KH, Kim HG, "Combined Process of Electrocoagulation and Magnetic Fluid Separation: Application to the Removal of Contaminants from Dye Wastewater," in Proceedings of the 7th Asian Conference on Fluidized-Bed and Three-Phase Reactors, Hamanako, Shizuoka-Ken, Japan, 373 (2000)

[7] Mills D, J. Am. Water Works Assoc., 92, 34 (2000)

[8] Mollah MYA, Schennach R, Parga JR, Cocke DL, J. Hazard. Mater., B84, 29 (2001)

[9] Shaikh AMH, Dixit SG, Water Res., 26, 845 (1992)

[10] Tsouris C, DePaoli DW, Shor JT, Hu MZC, Ying TY, Colloids Surf. A: Physicochem. Eng. Asp., 177, 223 (2001)

[11] Wang Y, Forssberg E, Miner. Metallurgical Process., 11, 87 (1994)

[12] Wu Z, Cong Y, Zhou M, Ye Q, Tan T, Korean J. Chem. Eng., 19(5), 866 (2002)