Lüken, Arne ; Linkhorst, John ; Fröhlingsdorf, Robin ; Lippert, Laura ; Rommel, Dirk ; De Laporte, Laura ; Wessling, Matthias (2020)
Unravelling Colloid Filter Cake Motions in Membrane Cleaning Procedures.
In: Scientific Reports, 10 (1)
doi: 10.1038/s41598-020-76970-x
Article, Bibliographie
Abstract
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2020 |
| Creators: | Lüken, Arne ; Linkhorst, John ; Fröhlingsdorf, Robin ; Lippert, Laura ; Rommel, Dirk ; De Laporte, Laura ; Wessling, Matthias |
| Type of entry: | Bibliographie |
| Title: | Unravelling Colloid Filter Cake Motions in Membrane Cleaning Procedures |
| Language: | English |
| Date: | November 2020 |
| Publisher: | Nature Publishing Group |
| Journal or Publication Title: | Scientific Reports |
| Volume of the journal: | 10 |
| Issue Number: | 1 |
| DOI: | 10.1038/s41598-020-76970-x |
| Abstract: | 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. |
| Uncontrolled Keywords: | Chemical engineering, Colloids, Gels and hydrogels |
| Divisions: | 16 Department of Mechanical Engineering 16 Department of Mechanical Engineering > Chair for Process Engineering of Electrochemical Systems |
| Date Deposited: | 13 Sep 2023 11:13 |
| Last Modified: | 13 Sep 2023 11:13 |
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