Seawater ultrafiltration fouling control: Backwashing with demineralized water/SWRO permeate

Sheng Li; Sebastiaan G J Heijman; J. Q J C Verberk; Gary L. Amy; Johannis C. Van Dijk

doi:10.1016/j.seppur.2012.07.002

Seawater ultrafiltration fouling control: Backwashing with demineralized water/SWRO permeate

Sheng Li, Sebastiaan G J Heijman, J. Q J C Verberk, Gary L. Amy, Johannis C. Van Dijk

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

In this study, the effect of demineralized water backwashing on fouling control of seawater ultrafiltration was investigated. Seawater from Scheveningen beach in The Hague and a desalination plant of Evides Company at Zeeland in the Netherlands was used as feed water, while demineralized water and UF permeate were used as backwash water for a fouling control efficiency comparison under different fluxes and backwash durations. Furthermore, demineralized waters with 5 or 50 mmol/l NaCl were applied for backwashing as well, to check the influence of monovalent cations on UF fouling control. Additionally, SWRO permeate was used for backwashes in long-term experiments to check the possibility of it replacing demineralized water. Results show that seawater UF fouling control is substantially improved by demineralized water backwashing. However, due to the high salinity of seawater, more water was required to dilute the cation concentration and limit the dispersion effect near the membrane surface than was needed for surface water. A 2-min demineralized water backwash showed better fouling control efficiency than a 1-min backwash. Furthermore, the presence of monovalent cations in the backwash water deteriorated the fouling control efficiency of the backwash, indicating the existence of a charge screening effect. The demineralized water with 5 and 50 mmol/l NaCl both showed a similar fouling control efficiency which is better than the UF permeate backwash. The calcium ions in UF permeate probably deteriorates the fouling control efficiency by maintaining a Ca-bridging effect between the membranes and NOM. SWRO permeate backwashing successfully controls membrane fouling as well. © 2012 Elsevier B.V. All rights reserved.

Original language	English (US)
Pages (from-to)	327-336
Number of pages	10
Journal	Separation and Purification Technology
Volume	98
DOIs	https://doi.org/10.1016/j.seppur.2012.07.002
State	Published - Sep 2012

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was funded by Senter Novem in the framework of the Innowator grants. Norit X-Flow B.V., the membrane manufacturer, the Netherlands, is gratefully acknowledged for providing UFC M5 0.8 membrane fibers. Evides. B.V. and Hatenboer-water. B.V. are appreciated for the cooperation in the DEMIFLUSH project.

ASJC Scopus subject areas

Filtration and Separation
Analytical Chemistry

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10.1016/j.seppur.2012.07.002

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@article{d22f6ffff00943139d2a5bef275d4cb9,

title = "Seawater ultrafiltration fouling control: Backwashing with demineralized water/SWRO permeate",

abstract = "In this study, the effect of demineralized water backwashing on fouling control of seawater ultrafiltration was investigated. Seawater from Scheveningen beach in The Hague and a desalination plant of Evides Company at Zeeland in the Netherlands was used as feed water, while demineralized water and UF permeate were used as backwash water for a fouling control efficiency comparison under different fluxes and backwash durations. Furthermore, demineralized waters with 5 or 50 mmol/l NaCl were applied for backwashing as well, to check the influence of monovalent cations on UF fouling control. Additionally, SWRO permeate was used for backwashes in long-term experiments to check the possibility of it replacing demineralized water. Results show that seawater UF fouling control is substantially improved by demineralized water backwashing. However, due to the high salinity of seawater, more water was required to dilute the cation concentration and limit the dispersion effect near the membrane surface than was needed for surface water. A 2-min demineralized water backwash showed better fouling control efficiency than a 1-min backwash. Furthermore, the presence of monovalent cations in the backwash water deteriorated the fouling control efficiency of the backwash, indicating the existence of a charge screening effect. The demineralized water with 5 and 50 mmol/l NaCl both showed a similar fouling control efficiency which is better than the UF permeate backwash. The calcium ions in UF permeate probably deteriorates the fouling control efficiency by maintaining a Ca-bridging effect between the membranes and NOM. SWRO permeate backwashing successfully controls membrane fouling as well. {\textcopyright} 2012 Elsevier B.V. All rights reserved.",

author = "Sheng Li and Heijman, {Sebastiaan G J} and Verberk, {J. Q J C} and Amy, {Gary L.} and {Van Dijk}, {Johannis C.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This research was funded by Senter Novem in the framework of the Innowator grants. Norit X-Flow B.V., the membrane manufacturer, the Netherlands, is gratefully acknowledged for providing UFC M5 0.8 membrane fibers. Evides. B.V. and Hatenboer-water. B.V. are appreciated for the cooperation in the DEMIFLUSH project.",

year = "2012",

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doi = "10.1016/j.seppur.2012.07.002",

language = "English (US)",

volume = "98",

pages = "327--336",

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AU - Li, Sheng

AU - Heijman, Sebastiaan G J

AU - Verberk, J. Q J C

AU - Amy, Gary L.

AU - Van Dijk, Johannis C.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This research was funded by Senter Novem in the framework of the Innowator grants. Norit X-Flow B.V., the membrane manufacturer, the Netherlands, is gratefully acknowledged for providing UFC M5 0.8 membrane fibers. Evides. B.V. and Hatenboer-water. B.V. are appreciated for the cooperation in the DEMIFLUSH project.

PY - 2012/9

Y1 - 2012/9

N2 - In this study, the effect of demineralized water backwashing on fouling control of seawater ultrafiltration was investigated. Seawater from Scheveningen beach in The Hague and a desalination plant of Evides Company at Zeeland in the Netherlands was used as feed water, while demineralized water and UF permeate were used as backwash water for a fouling control efficiency comparison under different fluxes and backwash durations. Furthermore, demineralized waters with 5 or 50 mmol/l NaCl were applied for backwashing as well, to check the influence of monovalent cations on UF fouling control. Additionally, SWRO permeate was used for backwashes in long-term experiments to check the possibility of it replacing demineralized water. Results show that seawater UF fouling control is substantially improved by demineralized water backwashing. However, due to the high salinity of seawater, more water was required to dilute the cation concentration and limit the dispersion effect near the membrane surface than was needed for surface water. A 2-min demineralized water backwash showed better fouling control efficiency than a 1-min backwash. Furthermore, the presence of monovalent cations in the backwash water deteriorated the fouling control efficiency of the backwash, indicating the existence of a charge screening effect. The demineralized water with 5 and 50 mmol/l NaCl both showed a similar fouling control efficiency which is better than the UF permeate backwash. The calcium ions in UF permeate probably deteriorates the fouling control efficiency by maintaining a Ca-bridging effect between the membranes and NOM. SWRO permeate backwashing successfully controls membrane fouling as well. © 2012 Elsevier B.V. All rights reserved.

AB - In this study, the effect of demineralized water backwashing on fouling control of seawater ultrafiltration was investigated. Seawater from Scheveningen beach in The Hague and a desalination plant of Evides Company at Zeeland in the Netherlands was used as feed water, while demineralized water and UF permeate were used as backwash water for a fouling control efficiency comparison under different fluxes and backwash durations. Furthermore, demineralized waters with 5 or 50 mmol/l NaCl were applied for backwashing as well, to check the influence of monovalent cations on UF fouling control. Additionally, SWRO permeate was used for backwashes in long-term experiments to check the possibility of it replacing demineralized water. Results show that seawater UF fouling control is substantially improved by demineralized water backwashing. However, due to the high salinity of seawater, more water was required to dilute the cation concentration and limit the dispersion effect near the membrane surface than was needed for surface water. A 2-min demineralized water backwash showed better fouling control efficiency than a 1-min backwash. Furthermore, the presence of monovalent cations in the backwash water deteriorated the fouling control efficiency of the backwash, indicating the existence of a charge screening effect. The demineralized water with 5 and 50 mmol/l NaCl both showed a similar fouling control efficiency which is better than the UF permeate backwash. The calcium ions in UF permeate probably deteriorates the fouling control efficiency by maintaining a Ca-bridging effect between the membranes and NOM. SWRO permeate backwashing successfully controls membrane fouling as well. © 2012 Elsevier B.V. All rights reserved.

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DO - 10.1016/j.seppur.2012.07.002

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ER -

Seawater ultrafiltration fouling control: Backwashing with demineralized water/SWRO permeate

Abstract

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