Nano-colloidal fouling mechanisms in seawater reverse osmosis process evaluated by cake resistance simulator-modified fouling index nanofiltration

Younggil Ju, Seungkwan Hong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Fouling potentials caused by particulate matters are generally evaluated by fouling index, such as SDI and MFI, widely used in RO membrane practices. However, these fouling indices failed to predict the effect of nano-colloidal sizes on flux decline, implying that colloidal fouling is too complex to be analyzed by simple fouling index. Thus, in this study, nano-colloidal fouling mechanism in seawater reverse osmosis (SWRO) desalination was fundamentally investigated by employing new approach. Specifically, the specific cake resistance of colloidal foulants was first determined by a novel method, cake resistance simulator-modified fouling index nanofiltration (MFI-NFCRS), which was conducted under operating pressure and solute environment similar to those of real SWRO desalination. Then colloidal deposition and resulting cake-enhanced osmotic pressure (CEOP) were quantitatively assessed by fitting RO experimental data to the calculations from the CEOP model. The results clearly demonstrated that the flux decline caused colloidal deposition in the SWRO process depended greatly on the CEOP. The newly developed methodology including MFI-NFCRS is expected to contribute significantly to better understand nano-colloidal fouling mechanisms and to accurately predict their fouling potentials in the SWRO desalination.

Original languageEnglish
Pages (from-to)88-96
Number of pages9
JournalDesalination
Volume343
DOIs
Publication statusPublished - 2014 Jun 16

Fingerprint

Nanofiltration
Reverse osmosis
Fouling
Seawater
fouling
simulator
Simulators
seawater
Desalination
desalination
Fluxes
reverse osmosis
index
Particulate Matter
particulate matter
solute
membrane
Membranes
methodology

Keywords

  • Cake resistance simulator-modified fouling index nanofiltration
  • Cake-enhanced osmotic pressure (CEOP)
  • Colloidal deposition
  • Fouling index
  • Nano-colloidal fouling mechanism
  • Seawater reverse osmosis (SWRO) desalination

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

Cite this

@article{035c2c31dd1d4a928c5e37b188e4817e,
title = "Nano-colloidal fouling mechanisms in seawater reverse osmosis process evaluated by cake resistance simulator-modified fouling index nanofiltration",
abstract = "Fouling potentials caused by particulate matters are generally evaluated by fouling index, such as SDI and MFI, widely used in RO membrane practices. However, these fouling indices failed to predict the effect of nano-colloidal sizes on flux decline, implying that colloidal fouling is too complex to be analyzed by simple fouling index. Thus, in this study, nano-colloidal fouling mechanism in seawater reverse osmosis (SWRO) desalination was fundamentally investigated by employing new approach. Specifically, the specific cake resistance of colloidal foulants was first determined by a novel method, cake resistance simulator-modified fouling index nanofiltration (MFI-NFCRS), which was conducted under operating pressure and solute environment similar to those of real SWRO desalination. Then colloidal deposition and resulting cake-enhanced osmotic pressure (CEOP) were quantitatively assessed by fitting RO experimental data to the calculations from the CEOP model. The results clearly demonstrated that the flux decline caused colloidal deposition in the SWRO process depended greatly on the CEOP. The newly developed methodology including MFI-NFCRS is expected to contribute significantly to better understand nano-colloidal fouling mechanisms and to accurately predict their fouling potentials in the SWRO desalination.",
keywords = "Cake resistance simulator-modified fouling index nanofiltration, Cake-enhanced osmotic pressure (CEOP), Colloidal deposition, Fouling index, Nano-colloidal fouling mechanism, Seawater reverse osmosis (SWRO) desalination",
author = "Younggil Ju and Seungkwan Hong",
year = "2014",
month = "6",
day = "16",
doi = "10.1016/j.desal.2014.03.012",
language = "English",
volume = "343",
pages = "88--96",
journal = "Desalination",
issn = "0011-9164",
publisher = "Elsevier",

}

TY - JOUR

T1 - Nano-colloidal fouling mechanisms in seawater reverse osmosis process evaluated by cake resistance simulator-modified fouling index nanofiltration

AU - Ju, Younggil

AU - Hong, Seungkwan

PY - 2014/6/16

Y1 - 2014/6/16

N2 - Fouling potentials caused by particulate matters are generally evaluated by fouling index, such as SDI and MFI, widely used in RO membrane practices. However, these fouling indices failed to predict the effect of nano-colloidal sizes on flux decline, implying that colloidal fouling is too complex to be analyzed by simple fouling index. Thus, in this study, nano-colloidal fouling mechanism in seawater reverse osmosis (SWRO) desalination was fundamentally investigated by employing new approach. Specifically, the specific cake resistance of colloidal foulants was first determined by a novel method, cake resistance simulator-modified fouling index nanofiltration (MFI-NFCRS), which was conducted under operating pressure and solute environment similar to those of real SWRO desalination. Then colloidal deposition and resulting cake-enhanced osmotic pressure (CEOP) were quantitatively assessed by fitting RO experimental data to the calculations from the CEOP model. The results clearly demonstrated that the flux decline caused colloidal deposition in the SWRO process depended greatly on the CEOP. The newly developed methodology including MFI-NFCRS is expected to contribute significantly to better understand nano-colloidal fouling mechanisms and to accurately predict their fouling potentials in the SWRO desalination.

AB - Fouling potentials caused by particulate matters are generally evaluated by fouling index, such as SDI and MFI, widely used in RO membrane practices. However, these fouling indices failed to predict the effect of nano-colloidal sizes on flux decline, implying that colloidal fouling is too complex to be analyzed by simple fouling index. Thus, in this study, nano-colloidal fouling mechanism in seawater reverse osmosis (SWRO) desalination was fundamentally investigated by employing new approach. Specifically, the specific cake resistance of colloidal foulants was first determined by a novel method, cake resistance simulator-modified fouling index nanofiltration (MFI-NFCRS), which was conducted under operating pressure and solute environment similar to those of real SWRO desalination. Then colloidal deposition and resulting cake-enhanced osmotic pressure (CEOP) were quantitatively assessed by fitting RO experimental data to the calculations from the CEOP model. The results clearly demonstrated that the flux decline caused colloidal deposition in the SWRO process depended greatly on the CEOP. The newly developed methodology including MFI-NFCRS is expected to contribute significantly to better understand nano-colloidal fouling mechanisms and to accurately predict their fouling potentials in the SWRO desalination.

KW - Cake resistance simulator-modified fouling index nanofiltration

KW - Cake-enhanced osmotic pressure (CEOP)

KW - Colloidal deposition

KW - Fouling index

KW - Nano-colloidal fouling mechanism

KW - Seawater reverse osmosis (SWRO) desalination

UR - http://www.scopus.com/inward/record.url?scp=84899641202&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84899641202&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2014.03.012

DO - 10.1016/j.desal.2014.03.012

M3 - Article

AN - SCOPUS:84899641202

VL - 343

SP - 88

EP - 96

JO - Desalination

JF - Desalination

SN - 0011-9164

ER -