Abstract
Fouling behavior along the length of membrane module was systematically investigated by performing simple modeling and lab-scale experiments of forward osmosis (FO) membrane process. The flux distribution model developed in this study showed a good agreement with experimental results, validating the robustness of the model. This model demonstrated, as expected, that the permeate flux decreased along the membrane channel due to decreasing osmotic pressure differential across the FO membrane. A series of fouling experiments were conducted under the draw and feed solutions at various recoveries simulated by the model. The simulated fouling experiments revealed that higher organic (alginate) fouling and thus more flux decline were observed at the last section of a membrane channel, as foulants in feed solution became more concentrated. Furthermore, the water flux in FO process declined more severely as the recovery increased due to more foulants transported to membrane surface with elevated solute concentrations at higher recovery, which created favorable solution environments for organic adsorption. The fouling reversibility also decreased at the last section of the membrane channel, suggesting that fouling distribution on FO membrane along the module should be carefully examined to improve overall cleaning efficiency. Lastly, it was found that such fouling distribution observed with co-current flow operation became less pronounced in counter-current flow operation of FO membrane process.
| Original language | English |
|---|---|
| Pages (from-to) | 1348-1354 |
| Number of pages | 7 |
| Journal | Journal of Environmental Sciences (China) |
| Volume | 26 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2014 Jun 1 |
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Keywords
- Counter-current flow FO operation
- Forward osmosis
- Fouling reversibility
- Membrane module length
- Organic fouling
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Science(all)
- Environmental Chemistry
Cite this
Fouling distribution in forward osmosis membrane process. / Lee, Junseok; Kim, Bongchul; Hong, Seungkwan.
In: Journal of Environmental Sciences (China), Vol. 26, No. 6, 01.06.2014, p. 1348-1354.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fouling distribution in forward osmosis membrane process
AU - Lee, Junseok
AU - Kim, Bongchul
AU - Hong, Seungkwan
PY - 2014/6/1
Y1 - 2014/6/1
N2 - Fouling behavior along the length of membrane module was systematically investigated by performing simple modeling and lab-scale experiments of forward osmosis (FO) membrane process. The flux distribution model developed in this study showed a good agreement with experimental results, validating the robustness of the model. This model demonstrated, as expected, that the permeate flux decreased along the membrane channel due to decreasing osmotic pressure differential across the FO membrane. A series of fouling experiments were conducted under the draw and feed solutions at various recoveries simulated by the model. The simulated fouling experiments revealed that higher organic (alginate) fouling and thus more flux decline were observed at the last section of a membrane channel, as foulants in feed solution became more concentrated. Furthermore, the water flux in FO process declined more severely as the recovery increased due to more foulants transported to membrane surface with elevated solute concentrations at higher recovery, which created favorable solution environments for organic adsorption. The fouling reversibility also decreased at the last section of the membrane channel, suggesting that fouling distribution on FO membrane along the module should be carefully examined to improve overall cleaning efficiency. Lastly, it was found that such fouling distribution observed with co-current flow operation became less pronounced in counter-current flow operation of FO membrane process.
AB - Fouling behavior along the length of membrane module was systematically investigated by performing simple modeling and lab-scale experiments of forward osmosis (FO) membrane process. The flux distribution model developed in this study showed a good agreement with experimental results, validating the robustness of the model. This model demonstrated, as expected, that the permeate flux decreased along the membrane channel due to decreasing osmotic pressure differential across the FO membrane. A series of fouling experiments were conducted under the draw and feed solutions at various recoveries simulated by the model. The simulated fouling experiments revealed that higher organic (alginate) fouling and thus more flux decline were observed at the last section of a membrane channel, as foulants in feed solution became more concentrated. Furthermore, the water flux in FO process declined more severely as the recovery increased due to more foulants transported to membrane surface with elevated solute concentrations at higher recovery, which created favorable solution environments for organic adsorption. The fouling reversibility also decreased at the last section of the membrane channel, suggesting that fouling distribution on FO membrane along the module should be carefully examined to improve overall cleaning efficiency. Lastly, it was found that such fouling distribution observed with co-current flow operation became less pronounced in counter-current flow operation of FO membrane process.
KW - Counter-current flow FO operation
KW - Forward osmosis
KW - Fouling reversibility
KW - Membrane module length
KW - Organic fouling
UR - http://www.scopus.com/inward/record.url?scp=84898409872&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84898409872&partnerID=8YFLogxK
U2 - 10.1016/S1001-0742(13)60610-5
DO - 10.1016/S1001-0742(13)60610-5
M3 - Article
C2 - 25079847
AN - SCOPUS:84898409872
VL - 26
SP - 1348
EP - 1354
JO - Journal of Environmental Sciences (China)
JF - Journal of Environmental Sciences (China)
SN - 1001-0742
IS - 6
ER -