Effect of cake layer structure on colloidal fouling in reverse osmosis membranes

Chanhyuk Park, Young Haeng Lee, Sang-Hyup Lee, Seungkwan Hong

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

A series of reverse osmosis (RO) membrane filtration experiments was performed systematically in order to investigate the effects of various hydrodynamic and physicochemical operational parameters on a cake layer formation in colloidal and particulate suspensions. Bench-scale fouling experiments with a thin-film composite RO membrane were performed at various combinations of trans-membrane pressure (TMP), cross-flow velocity (CFV), particle size, pH, and ionic strength. In this study, silica particles with two different mean diameters of 0.1 and 3.0 μm were used as model colloids. Membrane filtration experiments with colloidal suspensions under various hydrodynamic operating conditions resulted that more significant permeate flux decline was observed as TMP increased and CFV decreased, which was attributed to the higher accumulative mass of particles on the membrane surface. Results of fouling experiments under various physicochemical operating conditions demonstrated that the rate of flux decline decreased significantly with an increase of the ionic strength as well as particle size, while the flux decline rate did not vary when solution pH changed. The experimentally measured cake layer thickness increased with a decrease in particle size and solution ionic strength. Furthermore, the model estimation of cake layer thickness by using a cake filtration theory based on the hydraulic resistance of membrane and cake layer was performed under various ionic strength conditions. The primary model parameters including accumulated mass and specific cake resistance were calculated from the cake layer resistance. This result indicated that the formation of cake layer could be closely related with solution water chemistry. The model estimated cake layer thickness values were in good agreement with the experimentally measured values.

Original languageEnglish
Pages (from-to)335-344
Number of pages10
JournalDesalination
Volume220
Issue number1-3
DOIs
Publication statusPublished - 2008 Mar 1

Fingerprint

Osmosis membranes
Reverse osmosis
Fouling
fouling
Ionic strength
membrane
Membranes
Particle size
Fluxes
Flow velocity
Suspensions
particle size
Hydrodynamics
Experiments
flow velocity
experiment
Colloids
hydrodynamics
Silicon Dioxide
Silica

Keywords

  • Cake filtration theory
  • Cake layer thickness
  • Colloidal fouling
  • Reverse osmosis

ASJC Scopus subject areas

  • Filtration and Separation

Cite this

Effect of cake layer structure on colloidal fouling in reverse osmosis membranes. / Park, Chanhyuk; Lee, Young Haeng; Lee, Sang-Hyup; Hong, Seungkwan.

In: Desalination, Vol. 220, No. 1-3, 01.03.2008, p. 335-344.

Research output: Contribution to journalArticle

Park, Chanhyuk ; Lee, Young Haeng ; Lee, Sang-Hyup ; Hong, Seungkwan. / Effect of cake layer structure on colloidal fouling in reverse osmosis membranes. In: Desalination. 2008 ; Vol. 220, No. 1-3. pp. 335-344.
@article{9211af2630f94820931ee80e286aa6e0,
title = "Effect of cake layer structure on colloidal fouling in reverse osmosis membranes",
abstract = "A series of reverse osmosis (RO) membrane filtration experiments was performed systematically in order to investigate the effects of various hydrodynamic and physicochemical operational parameters on a cake layer formation in colloidal and particulate suspensions. Bench-scale fouling experiments with a thin-film composite RO membrane were performed at various combinations of trans-membrane pressure (TMP), cross-flow velocity (CFV), particle size, pH, and ionic strength. In this study, silica particles with two different mean diameters of 0.1 and 3.0 μm were used as model colloids. Membrane filtration experiments with colloidal suspensions under various hydrodynamic operating conditions resulted that more significant permeate flux decline was observed as TMP increased and CFV decreased, which was attributed to the higher accumulative mass of particles on the membrane surface. Results of fouling experiments under various physicochemical operating conditions demonstrated that the rate of flux decline decreased significantly with an increase of the ionic strength as well as particle size, while the flux decline rate did not vary when solution pH changed. The experimentally measured cake layer thickness increased with a decrease in particle size and solution ionic strength. Furthermore, the model estimation of cake layer thickness by using a cake filtration theory based on the hydraulic resistance of membrane and cake layer was performed under various ionic strength conditions. The primary model parameters including accumulated mass and specific cake resistance were calculated from the cake layer resistance. This result indicated that the formation of cake layer could be closely related with solution water chemistry. The model estimated cake layer thickness values were in good agreement with the experimentally measured values.",
keywords = "Cake filtration theory, Cake layer thickness, Colloidal fouling, Reverse osmosis",
author = "Chanhyuk Park and Lee, {Young Haeng} and Sang-Hyup Lee and Seungkwan Hong",
year = "2008",
month = "3",
day = "1",
doi = "10.1016/j.desal.2007.01.038",
language = "English",
volume = "220",
pages = "335--344",
journal = "Desalination",
issn = "0011-9164",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Effect of cake layer structure on colloidal fouling in reverse osmosis membranes

AU - Park, Chanhyuk

AU - Lee, Young Haeng

AU - Lee, Sang-Hyup

AU - Hong, Seungkwan

PY - 2008/3/1

Y1 - 2008/3/1

N2 - A series of reverse osmosis (RO) membrane filtration experiments was performed systematically in order to investigate the effects of various hydrodynamic and physicochemical operational parameters on a cake layer formation in colloidal and particulate suspensions. Bench-scale fouling experiments with a thin-film composite RO membrane were performed at various combinations of trans-membrane pressure (TMP), cross-flow velocity (CFV), particle size, pH, and ionic strength. In this study, silica particles with two different mean diameters of 0.1 and 3.0 μm were used as model colloids. Membrane filtration experiments with colloidal suspensions under various hydrodynamic operating conditions resulted that more significant permeate flux decline was observed as TMP increased and CFV decreased, which was attributed to the higher accumulative mass of particles on the membrane surface. Results of fouling experiments under various physicochemical operating conditions demonstrated that the rate of flux decline decreased significantly with an increase of the ionic strength as well as particle size, while the flux decline rate did not vary when solution pH changed. The experimentally measured cake layer thickness increased with a decrease in particle size and solution ionic strength. Furthermore, the model estimation of cake layer thickness by using a cake filtration theory based on the hydraulic resistance of membrane and cake layer was performed under various ionic strength conditions. The primary model parameters including accumulated mass and specific cake resistance were calculated from the cake layer resistance. This result indicated that the formation of cake layer could be closely related with solution water chemistry. The model estimated cake layer thickness values were in good agreement with the experimentally measured values.

AB - A series of reverse osmosis (RO) membrane filtration experiments was performed systematically in order to investigate the effects of various hydrodynamic and physicochemical operational parameters on a cake layer formation in colloidal and particulate suspensions. Bench-scale fouling experiments with a thin-film composite RO membrane were performed at various combinations of trans-membrane pressure (TMP), cross-flow velocity (CFV), particle size, pH, and ionic strength. In this study, silica particles with two different mean diameters of 0.1 and 3.0 μm were used as model colloids. Membrane filtration experiments with colloidal suspensions under various hydrodynamic operating conditions resulted that more significant permeate flux decline was observed as TMP increased and CFV decreased, which was attributed to the higher accumulative mass of particles on the membrane surface. Results of fouling experiments under various physicochemical operating conditions demonstrated that the rate of flux decline decreased significantly with an increase of the ionic strength as well as particle size, while the flux decline rate did not vary when solution pH changed. The experimentally measured cake layer thickness increased with a decrease in particle size and solution ionic strength. Furthermore, the model estimation of cake layer thickness by using a cake filtration theory based on the hydraulic resistance of membrane and cake layer was performed under various ionic strength conditions. The primary model parameters including accumulated mass and specific cake resistance were calculated from the cake layer resistance. This result indicated that the formation of cake layer could be closely related with solution water chemistry. The model estimated cake layer thickness values were in good agreement with the experimentally measured values.

KW - Cake filtration theory

KW - Cake layer thickness

KW - Colloidal fouling

KW - Reverse osmosis

UR - http://www.scopus.com/inward/record.url?scp=38349016917&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38349016917&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2007.01.038

DO - 10.1016/j.desal.2007.01.038

M3 - Article

VL - 220

SP - 335

EP - 344

JO - Desalination

JF - Desalination

SN - 0011-9164

IS - 1-3

ER -