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 language | English |
|---|---|
| Pages (from-to) | 88-96 |
| Number of pages | 9 |
| Journal | Desalination |
| Volume | 343 |
| DOIs | |
| Publication status | Published - 2014 Jun 16 |
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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
Nano-colloidal fouling mechanisms in seawater reverse osmosis process evaluated by cake resistance simulator-modified fouling index nanofiltration. / Ju, Younggil; Hong, Seungkwan.
In: Desalination, Vol. 343, 16.06.2014, p. 88-96.Research output: Contribution to journal › Article
}
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 -