Membrane fouling quantification by specific cake resistance and flux enhancement using helical cleaners

Ghaffour, Noreddine; Qamar, Adnan

doi:10.1016/j.seppur.2020.116587

“…Firstly, the design should minimize the concentration polarization, resulting in improving the mass transport characteristic 16 . Secondly, it should produce high shear stress on the membrane surface to minimize particulate accumulation 48 . And lastly, the induced pressure drop due to spacer design should be minimal to reduce the energy requirements of the filtration process 16 .…”

Section: Resultsmentioning

confidence: 99%

Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration

Qamar

¹

,

Kerdi

²

,

Ali

³

et al. 2021

Sci Rep

Self Cite

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Feed spacers are the critical components of any spiral-wound filtration module, dictating the filtration performance. Three spacer designs, namely a non-woven commercial spacer (varying filament cross-section), a symmetric pillar spacer, and a novel hole-pillar spacer (constant filament diameter) were studied using Direct Numerical Simulations (DNS), 3-D printed and subsequently experimentally tested in a lab-scale ultrafiltration set-up with high biofouling potential feed water at various feed pressures. Independent of the applied pressure, the novel hole-pillar spacer showed initially the lowest feed channel pressure drop, the lowest shear stress, and the highest permeate flux compared to the commercial and pillar spacers. Furthermore, less biofilm thickness development on membrane surface was visualized by Optical Coherent Tomography (OCT) imaging for the proposed hole-pillar spacer. At higher feed pressure, a thicker biofilm developed on membrane surface for all spacer designs explaining the stronger decrease in permeate flux at high pressure. The findings systematically demonstrated the role of various spacer designs and applied pressure on the performance of pre-treatment process, while identifying specific shear stress distribution guidelines for engineering a new spacer design in different filtration techniques.

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“…where μ is viscosity, w c is the total cake mass, P is pressure, R m is the membrane intrinsic resistance and can be determined with Kozeny-Carman theory [20]:…”

Section: Permeate Fluxmentioning

confidence: 99%

Modelling of oligodextran production via an immobilized enzyme membrane reactor: Bioreaction-separation coupling mechanism

Li

¹

,

Su

²

,

Luo

³

et al. 2022

Separation and Purification Technology

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“…Firstly, the design should minimize the concentration polarization, resulting in improving the mass transport characteristic 16 . Secondly, it should produce high shear stress on the membrane surface to minimize particulate accumulation 42 . And lastly, the induced pressure drop due to spacer design should be minimal to reduce the energy requirements of the ltration process 16 .…”

Section: Perspectivesmentioning

confidence: 99%

Novel Hole-Pillar Spacer Design for Improved Hydrodynamics and Biofouling Mitigation in Membrane Filtration

Qamar

¹

,

Kerdi

²

,

Ali

³

et al. 2020

Preprint

Self Cite

0

View full text Add to dashboard Cite

Feed spacers are the critical components of any spiral-wound filtration module, dictating the filtration performance. Three spacer designs, namely a non-woven commercial spacer (varying filament cross-section), a symmetric pillar spacer, and a novel hole-pillar spacer (constant filament diameter) were studied using Direct Numerical Simulations (DNS), 3-D printed and subsequently experimentally tested in a lab-scale ultrafiltration set-up with high biofouling potential feed water at various feed pressures. Independent of the applied pressure, the novel hole-pillar spacer showed initially the lowest feed channel pressure drop, the lowest shear stress, and the highest permeate flux compared to the commercial and pillar spacers. Furthermore, less biofilm thickness development on membrane surface was visualized by Optical Coherent Tomography (OCT) imaging for the proposed hole-pillar spacer. At higher feed pressure, a thicker biofilm developed on membrane surface for all spacer designs explaining the stronger decrease in permeate flux at high pressure. The findings systematically demonstrated the role of various spacer designs and applied pressure on the performance of pre-treatment process, while identifying specific shear stress distribution guidelines for engineering a new spacer design in different filtration techniques.

show abstract

Membrane fouling quantification by specific cake resistance and flux enhancement using helical cleaners

Cited by 36 publications

References 46 publications

Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration

Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration

Modelling of oligodextran production via an immobilized enzyme membrane reactor: Bioreaction-separation coupling mechanism

Novel Hole-Pillar Spacer Design for Improved Hydrodynamics and Biofouling Mitigation in Membrane Filtration

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