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

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) we...

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Autores principales: Qamar, Adnan, Kerdi, Sarah, Ali, Syed Muztuza, Shon, Ho Kyong, Vrouwenvelder, Johannes S., Ghaffour, Noreddine
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7998016/
https://www.ncbi.nlm.nih.gov/pubmed/33772069
http://dx.doi.org/10.1038/s41598-021-86459-w
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author Qamar, Adnan
Kerdi, Sarah
Ali, Syed Muztuza
Shon, Ho Kyong
Vrouwenvelder, Johannes S.
Ghaffour, Noreddine
author_facet Qamar, Adnan
Kerdi, Sarah
Ali, Syed Muztuza
Shon, Ho Kyong
Vrouwenvelder, Johannes S.
Ghaffour, Noreddine
author_sort Qamar, Adnan
collection PubMed
description 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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spelling pubmed-79980162021-03-30 Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration Qamar, Adnan Kerdi, Sarah Ali, Syed Muztuza Shon, Ho Kyong Vrouwenvelder, Johannes S. Ghaffour, Noreddine Sci Rep Article 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. Nature Publishing Group UK 2021-03-26 /pmc/articles/PMC7998016/ /pubmed/33772069 http://dx.doi.org/10.1038/s41598-021-86459-w Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Qamar, Adnan
Kerdi, Sarah
Ali, Syed Muztuza
Shon, Ho Kyong
Vrouwenvelder, Johannes S.
Ghaffour, Noreddine
Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration
title Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration
title_full Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration
title_fullStr Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration
title_full_unstemmed Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration
title_short Novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration
title_sort novel hole-pillar spacer design for improved hydrodynamics and biofouling mitigation in membrane filtration
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7998016/
https://www.ncbi.nlm.nih.gov/pubmed/33772069
http://dx.doi.org/10.1038/s41598-021-86459-w
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