Assessment of fouling mechanisms in treating organic solutes synthesizing glycerin-water solutions by modified Hermia model

M. A. Indok Nurul Hasyimah, Abdul Wahab Mohammad

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Studies were conducted to investigate the membrane fouling and flux decline behavior that occurs while treating organic solutes contained in glycerin-water solutions (triglyceride, TG, and long chain fatty acid, FA). The analysis of the decline in flux over time while treating organic solutes was used to predict the fouling propensity. Two ultrafiltration membranes were tested: polyethersulphone (PES 25 kDa) and polyvinylidenfluoride (PVDF 30 kDa) membranes using glycerin-water solutions containing organic solutes (TG and FA). The influence of single TG and its combination with oleic acid (TG-FA mixtures) as foulant models, pH of feed solutions (3-10), and membrane surface chemistry were investigated. Hermias model was applied, and the fitting of the experimental data to these models showed that the flux decline of PES membrane was dominated by pore blockage at the early stage and later by cake resistance during the entire filtration time. Conversely, for the PVDF membrane, the cake formation mechanism was acknowledged as the major contributor to the fouling mechanism for all the parameters tested. In consequence, the deposition mechanism was strongly influenced by the chemical nature of the membrane material itself, the nature of the foulants (TG and FA), and a combination of them as well as the chemistry of the feed solutions. Further, the model did not predict the performance over the complete duration of filtration, but two stages of filtration appeared to occur, involving pore blockage at the early stage followed by cake formation. It shows that fouling usually involves several mechanisms which occur simultaneously.

Original languageEnglish
Pages (from-to)15213-15221
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume53
Issue number39
DOIs
Publication statusPublished - 1 Oct 2014

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Fouling
Glycerol
Membranes
Water
Fluxes
Membrane fouling
Oleic acid
Ultrafiltration
Oleic Acid
Surface chemistry
Fatty acids
Triglycerides
Fatty Acids

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

Cite this

Assessment of fouling mechanisms in treating organic solutes synthesizing glycerin-water solutions by modified Hermia model. / Indok Nurul Hasyimah, M. A.; Mohammad, Abdul Wahab.

In: Industrial and Engineering Chemistry Research, Vol. 53, No. 39, 01.10.2014, p. 15213-15221.

Research output: Contribution to journalArticle

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