Analysis of deposition mechanism during ultrafiltration of glycerin-rich solutions

Indok Nurul Hasyimah Mohd Amin, Abdul Wahab Mohammad, Mastura Markom, Leo Choe Peng, Nidal Hilal

Research output: Contribution to journalArticlepeer-review


Clarification of glycerin-rich solution is one of the potential applications of membrane within the oleochemical industry. However, one of the barriers in successfully utilizing the use of membranes such as ultrafiltration (UF) has been due to the fouling. In this work, flux decline during ultrafiltration of the glycerin-rich solutions was studied by using commercialized polymeric polyethersulphone (PES) membrane. Influence of fatty acids as foulants model (palmitic acid, stearic acid and oleic acid), pH of feed solution (3-10) and molecular weight cut-off (5 kDa, 20 kDa and 25 kDa) were analyzed. All the experiments were performed at constant pressure (2 bar) and temperature (40 °C). The Hermia's model was used to analyze the fouling mechanism during the flux decline which involve cake layermodel due to adsorption of solute aswell as pore blockingmodel. All the different types of flux decline kinetics were found to occur during the permeation of glycerin-rich solutions. However, the contribution of resistance due to cake layer formation was small for all the conditions studied. The fouling mechanisms were found to depend on the hydrophobicity of the PES membrane itself as well as the nature of foulants used in the study.

Original languageEnglish (US)
Pages (from-to)313-320
Number of pages8
Issue number3
StatePublished - Oct 2010


  • Blocking mechanism
  • Flux decline
  • Fouling
  • Glycerin

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science
  • Water Science and Technology
  • Mechanical Engineering


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