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
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Lüken, Arne ; Linkhorst, John ; Fröhlingsdorf, Robin ; Lippert, Laura ; Rommel, Dirk ; De Laporte, Laura ; Wessling, Matthias |
| Art des Eintrags: | Bibliographie |
| Titel: | Unravelling Colloid Filter Cake Motions in Membrane Cleaning Procedures |
| Sprache: | Englisch |
| Publikationsjahr: | November 2020 |
| Verlag: | Nature Publishing Group |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Scientific Reports |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1038/s41598-020-76970-x |
| Kurzbeschreibung (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. |
| Freie Schlagworte: | Chemical engineering, Colloids, Gels and hydrogels |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Verfahrenstechnik elektrochemischer Systeme (VES) |
| Hinterlegungsdatum: | 13 Sep 2023 11:13 |
| Letzte Änderung: | 13 Sep 2023 11:13 |
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