Effects of Pore Size, Suspension Concentration, and Pre-Sedimentation on the Measurement of Filter Medium Resistance in Cake Filtration

Sung-Sam Yim; Young-Du Kwon; Hyung-Il Kim

Korean Journal of Chemical Engineering, Vol.18, No.5, 741-749, September, 2001

Sung-Sam Yim^†, Young-Du Kwon¹, and Hyung-Il Kim

Department of Environmental Engineering, Inha University, Inchon 402-751, Korea
¹Department of Environmental Engineering, Donghae University, Kangwon 240-713, Korea

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Theoretical and experimental study was conducted on the factors influencing the measurement of filter medium resistance by Ruth’s equation. It was determined that a filter medium having small pore size does not always give high filter medium resistance. The appropriate pore size of filter medium for filtration was analysed. The resistances of filter media measured with thick suspensions by Ruth’s equation have negative values. This phenomenon can be analyzed as the effect of sedimentation during the long filtration time due to thick suspension. When sedimentation occurs before the start of filtration, the filter medium resistance measured by Ruth’s equation gives a large value. It was determined that the result of the filtration of sediment was included in the filter medium resistance. A new method for measuring filter medium resistance by the filtration of the sediment is proposed. This method excludes the effects of suspension concentration and pre-sedimentation.

Keywords:Filtration;Cake Filtration;Filter Medium;Resistance of Filter Medium;Pore Diameter;Filtration-Permeation;Filtration with Sedimentation

[References]

Bockstal F, Fouarge L, Hermia J, Fahier G, Filtr. Sep., July/August, 255 (1985)
Carman PC, Transactions-Institution Chem. Eng., 168 (1938)
Confucius, "Chun Qiu," (BC 479)
Grace HP, Chem. Eng. Prog., 49(7), 367 (1953)
Hosseini M, M.S., Thesis, University of Manchester, Manchester, England (1977)
McCabe WL, Smith JC, "Unit Operations of Chemical Engineering," 3(rd) edition, McGraw-Hill, New York (1976)
McCabe WL, Smith JC, Harriot P, "Unit Operations of Chemical Engineering," 5(th) edition, McGraw-Hill, New York (1995)
Ruth BF, Ind. Eng. Chem., 38(6), 564 (1946)
Sperry DR, Metallurgical Chem. Eng., 4(12), 161 (1917)
Tiller FM, Fluid Particle Sep. J., 3, 85 (1990)
Tiller FM, Cooper HR, AIChE J., 4(6), 595 (1960)
Tiller FM, Hsyung NB, Cong DZ, AIChE J., 41(5), 1153 (1995)
Yim SS, "A New Method: Filtration-Permeation for Filtration Theory and Application," 5(th) World Filtration Congress, Nice, France, 1, 91 (1990)
Yim SS, Korean J. Chem. Eng., 16(3), 308 (1999)
Yim SS, Ben Aim R, "Highly Compressible Cake Filtration: Application to the Filtration of Flocculated Particles," World 4th Filtration Congress, A1 (1986)
Yim SS, Kim JH, Korean J. Chem. Eng., 17(4), 393 (2000)
Yim SS, Kwon YD, HWAHAK KONGHAK, 38(6), 839 (2000)

[Referenced By]

[1] Bockstal F, Fouarge L, Hermia J, Fahier G, Filtr. Sep., July/August, 255 (1985)

[2] Carman PC, Transactions-Institution Chem. Eng., 168 (1938)

[3] Confucius, "Chun Qiu," (BC 479)

[4] Grace HP, Chem. Eng. Prog., 49(7), 367 (1953)

[5] Hosseini M, M.S., Thesis, University of Manchester, Manchester, England (1977)

[6] McCabe WL, Smith JC, "Unit Operations of Chemical Engineering," 3(rd) edition, McGraw-Hill, New York (1976)

[7] McCabe WL, Smith JC, Harriot P, "Unit Operations of Chemical Engineering," 5(th) edition, McGraw-Hill, New York (1995)

[8] Ruth BF, Ind. Eng. Chem., 38(6), 564 (1946)

[9] Sperry DR, Metallurgical Chem. Eng., 4(12), 161 (1917)

[10] Tiller FM, Fluid Particle Sep. J., 3, 85 (1990)

[11] Tiller FM, Cooper HR, AIChE J., 4(6), 595 (1960)

[12] Tiller FM, Hsyung NB, Cong DZ, AIChE J., 41(5), 1153 (1995)

[13] Yim SS, "A New Method: Filtration-Permeation for Filtration Theory and Application," 5(th) World Filtration Congress, Nice, France, 1, 91 (1990)

[14] Yim SS, Korean J. Chem. Eng., 16(3), 308 (1999)

[15] Yim SS, Ben Aim R, "Highly Compressible Cake Filtration: Application to the Filtration of Flocculated Particles," World 4th Filtration Congress, A1 (1986)

[16] Yim SS, Kim JH, Korean J. Chem. Eng., 17(4), 393 (2000)

[17] Yim SS, Kwon YD, HWAHAK KONGHAK, 38(6), 839 (2000)