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Unravelling colloid filter cake motions in membrane cleaning procedures
The filtration performance of soft colloid suspensions suffers from the agglomeration of the colloids on the membrane surface as filter cakes. Backflushing of fluid through the membrane and cross-flow flushing across the membrane are widely used methods to temporally remove the filter cake and resto...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7674421/ https://www.ncbi.nlm.nih.gov/pubmed/33208808 http://dx.doi.org/10.1038/s41598-020-76970-x |
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author | Lüken, Arne Linkhorst, John Fröhlingsdorf, Robin Lippert, Laura Rommel, Dirk De Laporte, Laura Wessling, Matthias |
author_facet | Lüken, Arne Linkhorst, John Fröhlingsdorf, Robin Lippert, Laura Rommel, Dirk De Laporte, Laura Wessling, Matthias |
author_sort | Lüken, Arne |
collection | PubMed |
description | The filtration performance of soft colloid suspensions suffers from the agglomeration of the colloids on the membrane surface as filter cakes. Backflushing of fluid through the membrane and cross-flow flushing across the membrane are widely used methods to temporally remove the filter cake and restore the flux through the membrane. However, the phenomena occurring during the recovery of the filtration performance are not yet fully described. In this study, we filtrate poly(N-isopropylacrylamide) microgels and analyze the filter cake in terms of its composition and its dynamic mobility during removal using on-line laser scanning confocal microscopy. First, we observe uniform cake build-up that displays highly ordered and amorphous regions in the cake layer. Second, backflushing removes the cake in coherent pieces and their sizes depend on the previous cake build-up. And third, cross-flow flushing along the cake induces a pattern of longitudinal ridges on the cake surface, which depends on the cross-flow velocity and accelerates cake removal. These observations give insight into soft colloid filter cake arrangement and reveal the cake’s unique behaviour exposed to shear-stress. |
format | Online Article Text |
id | pubmed-7674421 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-76744212020-11-19 Unravelling colloid filter cake motions in membrane cleaning procedures Lüken, Arne Linkhorst, John Fröhlingsdorf, Robin Lippert, Laura Rommel, Dirk De Laporte, Laura Wessling, Matthias Sci Rep Article The filtration performance of soft colloid suspensions suffers from the agglomeration of the colloids on the membrane surface as filter cakes. Backflushing of fluid through the membrane and cross-flow flushing across the membrane are widely used methods to temporally remove the filter cake and restore the flux through the membrane. However, the phenomena occurring during the recovery of the filtration performance are not yet fully described. In this study, we filtrate poly(N-isopropylacrylamide) microgels and analyze the filter cake in terms of its composition and its dynamic mobility during removal using on-line laser scanning confocal microscopy. First, we observe uniform cake build-up that displays highly ordered and amorphous regions in the cake layer. Second, backflushing removes the cake in coherent pieces and their sizes depend on the previous cake build-up. And third, cross-flow flushing along the cake induces a pattern of longitudinal ridges on the cake surface, which depends on the cross-flow velocity and accelerates cake removal. These observations give insight into soft colloid filter cake arrangement and reveal the cake’s unique behaviour exposed to shear-stress. Nature Publishing Group UK 2020-11-18 /pmc/articles/PMC7674421/ /pubmed/33208808 http://dx.doi.org/10.1038/s41598-020-76970-x Text en © The Author(s) 2020 https://creativecommons.org/licenses/by/4.0/Open AccessThis 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/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Lüken, Arne Linkhorst, John Fröhlingsdorf, Robin Lippert, Laura Rommel, Dirk De Laporte, Laura Wessling, Matthias Unravelling colloid filter cake motions in membrane cleaning procedures |
title | Unravelling colloid filter cake motions in membrane cleaning procedures |
title_full | Unravelling colloid filter cake motions in membrane cleaning procedures |
title_fullStr | Unravelling colloid filter cake motions in membrane cleaning procedures |
title_full_unstemmed | Unravelling colloid filter cake motions in membrane cleaning procedures |
title_short | Unravelling colloid filter cake motions in membrane cleaning procedures |
title_sort | unravelling colloid filter cake motions in membrane cleaning procedures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7674421/ https://www.ncbi.nlm.nih.gov/pubmed/33208808 http://dx.doi.org/10.1038/s41598-020-76970-x |
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