Korean Journal of Chemical Engineering

, Volume 18, Issue 5, pp 741–749 | Cite as

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


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.

Key words

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


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Copyright information

© Korean Institute of Chemical Engineering 2001

Authors and Affiliations

  1. 1.Department of Environmental EngineeringInha UniversityInchonKorea
  2. 2.Department of Environmental EngineeringDonghae UniversityKangwonKorea

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