Setting-up of modified fouling index (MFI) and crossflow sampler-modified fouling index (CFS-MFI) measurement devices for NF/RO fouling

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Abstract

This paper deals with setting-up of modified fouling index (MFI) and crossflow sampler-modified fouling index (CFS-MFI) devices for prediction of fouling potential in a reverse osmosis (RO)/nanofiltration (NF) filtration system. The setting-up procedures of the laboratory-scale MFI and CFS-MFI devices operated in constant flux were described in detail. A practical approach to test the functionality of devices was also suggested. The devices are instrumented for monitoring transmembrane pressure, crossflow velocity, and flux at a desired time interval. A series of MFIconst.flux and CFS-MFIconst.flux tests were carried out using various types of membranes and foulants to determine the functionality and consistency of the newly developed system. The results showed that the differences between MFIconst.flux and CFS-MFIconst.flux values were more significant for high polydispersed foulants (e.g., 70-100nm colloidal silica and Aldrich humic acid) than monodispersed foulants (e.g., 22nm particle colloidal silica). When using the polydispersed foulants, the CFS-MFIconst.flux showed a better agreement with actual RO fouling trend than the MFIconst.flux. These observations proved that with the presence of CFS cell, the CFS-MFIconst.flux is capable of simulating a more realistic RO fouling behaviour than the MFIconst.flux value (without the consideration of crossflow effect). The successful setting-up of the fouling prediction devices in this study would provide a useful guide for future researchers on the fouling potential of membrane.

Original languageEnglish
Pages (from-to)165-175
Number of pages11
JournalJournal of Membrane Science
Volume435
DOIs
Publication statusPublished - 5 May 2013

Fingerprint

Osmosis
reverse osmosis
Nanofiltration
samplers
fouling
Reverse osmosis
Fouling
Fluxes
Equipment and Supplies
Silicon Dioxide
Humic Substances
Membrane Potentials
Silica
Research Personnel
silicon dioxide
membranes
Membranes
Pressure
predictions

Keywords

  • Colloidal silica particles
  • Constant flux
  • Fouling prediction
  • Humic acid
  • Ultrafiltration

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science(all)
  • Biochemistry
  • Filtration and Separation

Cite this

@article{33fb723439574c03a96e63a6381f7981,
title = "Setting-up of modified fouling index (MFI) and crossflow sampler-modified fouling index (CFS-MFI) measurement devices for NF/RO fouling",
abstract = "This paper deals with setting-up of modified fouling index (MFI) and crossflow sampler-modified fouling index (CFS-MFI) devices for prediction of fouling potential in a reverse osmosis (RO)/nanofiltration (NF) filtration system. The setting-up procedures of the laboratory-scale MFI and CFS-MFI devices operated in constant flux were described in detail. A practical approach to test the functionality of devices was also suggested. The devices are instrumented for monitoring transmembrane pressure, crossflow velocity, and flux at a desired time interval. A series of MFIconst.flux and CFS-MFIconst.flux tests were carried out using various types of membranes and foulants to determine the functionality and consistency of the newly developed system. The results showed that the differences between MFIconst.flux and CFS-MFIconst.flux values were more significant for high polydispersed foulants (e.g., 70-100nm colloidal silica and Aldrich humic acid) than monodispersed foulants (e.g., 22nm particle colloidal silica). When using the polydispersed foulants, the CFS-MFIconst.flux showed a better agreement with actual RO fouling trend than the MFIconst.flux. These observations proved that with the presence of CFS cell, the CFS-MFIconst.flux is capable of simulating a more realistic RO fouling behaviour than the MFIconst.flux value (without the consideration of crossflow effect). The successful setting-up of the fouling prediction devices in this study would provide a useful guide for future researchers on the fouling potential of membrane.",
keywords = "Colloidal silica particles, Constant flux, Fouling prediction, Humic acid, Ultrafiltration",
author = "Koo, {Chai Hoon} and Mohammad, {Abdul Wahab} and Fatihah Suja` and {Meor Talib}, {Meor Zainal}",
year = "2013",
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T1 - Setting-up of modified fouling index (MFI) and crossflow sampler-modified fouling index (CFS-MFI) measurement devices for NF/RO fouling

AU - Koo, Chai Hoon

AU - Mohammad, Abdul Wahab

AU - Suja`, Fatihah

AU - Meor Talib, Meor Zainal

PY - 2013/5/5

Y1 - 2013/5/5

N2 - This paper deals with setting-up of modified fouling index (MFI) and crossflow sampler-modified fouling index (CFS-MFI) devices for prediction of fouling potential in a reverse osmosis (RO)/nanofiltration (NF) filtration system. The setting-up procedures of the laboratory-scale MFI and CFS-MFI devices operated in constant flux were described in detail. A practical approach to test the functionality of devices was also suggested. The devices are instrumented for monitoring transmembrane pressure, crossflow velocity, and flux at a desired time interval. A series of MFIconst.flux and CFS-MFIconst.flux tests were carried out using various types of membranes and foulants to determine the functionality and consistency of the newly developed system. The results showed that the differences between MFIconst.flux and CFS-MFIconst.flux values were more significant for high polydispersed foulants (e.g., 70-100nm colloidal silica and Aldrich humic acid) than monodispersed foulants (e.g., 22nm particle colloidal silica). When using the polydispersed foulants, the CFS-MFIconst.flux showed a better agreement with actual RO fouling trend than the MFIconst.flux. These observations proved that with the presence of CFS cell, the CFS-MFIconst.flux is capable of simulating a more realistic RO fouling behaviour than the MFIconst.flux value (without the consideration of crossflow effect). The successful setting-up of the fouling prediction devices in this study would provide a useful guide for future researchers on the fouling potential of membrane.

AB - This paper deals with setting-up of modified fouling index (MFI) and crossflow sampler-modified fouling index (CFS-MFI) devices for prediction of fouling potential in a reverse osmosis (RO)/nanofiltration (NF) filtration system. The setting-up procedures of the laboratory-scale MFI and CFS-MFI devices operated in constant flux were described in detail. A practical approach to test the functionality of devices was also suggested. The devices are instrumented for monitoring transmembrane pressure, crossflow velocity, and flux at a desired time interval. A series of MFIconst.flux and CFS-MFIconst.flux tests were carried out using various types of membranes and foulants to determine the functionality and consistency of the newly developed system. The results showed that the differences between MFIconst.flux and CFS-MFIconst.flux values were more significant for high polydispersed foulants (e.g., 70-100nm colloidal silica and Aldrich humic acid) than monodispersed foulants (e.g., 22nm particle colloidal silica). When using the polydispersed foulants, the CFS-MFIconst.flux showed a better agreement with actual RO fouling trend than the MFIconst.flux. These observations proved that with the presence of CFS cell, the CFS-MFIconst.flux is capable of simulating a more realistic RO fouling behaviour than the MFIconst.flux value (without the consideration of crossflow effect). The successful setting-up of the fouling prediction devices in this study would provide a useful guide for future researchers on the fouling potential of membrane.

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KW - Constant flux

KW - Fouling prediction

KW - Humic acid

KW - Ultrafiltration

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