Investigations on the Particle Fouling and Backwash Efficiency During Microplastic Microfiltration–Particle Size Aspects

The characteristics of polystyrene (PS) microplastic (MP) microfiltration by a cellulose acetate (CA) membrane were investigated within this study. Particle sizes and pore sizes were selected in a comparable range in order to challenge the dead-end microfiltration. Backwashing experiments round up t...

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Veröffentlicht in:Membranes (Basel) Jg. 15; H. 9; S. 272
Hauptverfasser: Saremi, Saeedeh, Scheer, Leonie Marie, Braun, Gerhard, Koch, Marcus, Gallei, Markus, Faust, Matthias
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Switzerland MDPI AG 09.09.2025
Schlagworte:
Acetic acid
Analysis
Backwash
Cellulose
Cellulose acetate
Composite materials
Contact angle
Decomposition
Efficiency
Experiments
Filter cake
Filtration
Fouling
Investigations
Low pressure
Membranes
Microfiltration
microplastic separation
Microplastics
Particle deposition
Particle size
particle-fouling analysis
Plastic pollution
Political aspects
Polymers
Polystyrene
Polystyrene resins
Pore size
Pressure filtration
Scanning electron microscopy
Temperature
Thermogravimetric analysis
Water
water treatment process
Germany
water treatment process
microfiltration
microplastic separation
particle-fouling analysis
ISSN:2077-0375, 2077-0375
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Zusammenfassung:The characteristics of polystyrene (PS) microplastic (MP) microfiltration by a cellulose acetate (CA) membrane were investigated within this study. Particle sizes and pore sizes were selected in a comparable range in order to challenge the dead-end microfiltration. Backwashing experiments round up the investigations. Microfiltration characteristics and particle size measurements, as well as a particle fouling analysis by different methods, were applied in the study in order to provide a comprehensive picture of particle deposition and particle fouling structuring. The particle removal efficiency was particle-size-dependent, and especially small particles were further reduced during the proceeding filtration, while the larger particles were already removed within the first minutes of filtration. This observation was attributed to the pore blocking (internal and/or complete) and build-up of the filter cake. The difference in the particle-fouling structure at low and elevated filtration pressure significantly influences the backwashing efficiency. The particle fouling resulting from low-pressure filtration was completely removed due to the backwashing procedure applied, while an increased filtration pressure resulted in a different particle-fouling structure, which negatively influenced the backwashing efficiency. This knowledge of the formation and structure of the MP particle fouling and its removal by backwashing is a prerequisite for further process development.
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ISSN:2077-0375
2077-0375
DOI:10.3390/membranes15090272