3D Cryo-FIB/SEM For Microalgae Filtration Applications: Probing Biomolecules Buried Inside Porous Polymeric Media

The membrane filtration process allows to extract, concentrate, purify and separate different components of a complex mix. The main role of the membrane is to allow the permeation of one element, while blocking others because of size or charge exclusion. Recently, they have been adapted for microalg...

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Veröffentlicht in:Microscopy and microanalysis 2022-08, Vol.28 (S1), p.74-76
Hauptverfasser: Roberge, Hélène, Moreau, Philippe, Couallier, Estelle, Abellan, Patricia
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Sprache:eng
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Zusammenfassung:The membrane filtration process allows to extract, concentrate, purify and separate different components of a complex mix. The main role of the membrane is to allow the permeation of one element, while blocking others because of size or charge exclusion. Recently, they have been adapted for microalgae valorisation, where filtration employing porous polymer membranes is used to separate and recover lipids and proteins from ground microalgae aqueous extracts. The biomolecules recovered can be used in pharmaceutical industry, cosmetics, food supplements or biofuel industry as biodiesel [1], [2]. During filtration, obstruction of membrane pores and accumulation of biomolecules at the surface and in the porous medium, called fouling, is a major operational challenge and a well-known drawback in membrane filtration. A detailed characterization of the pore structure, as well as its interaction with the target biomolecules, is essential to understand and help minimize the fouling of the membrane. Widely used commercial polymer membranes such as those used in this study: the PAN (polyacrylonitrile, nominal 30nm pore size, Orelis) and the PES (polyethersulfone, ominal 0.1μm pore size, Koch), have a so called asymmetric structure, which includes the presence of a very thin selective layer and changing pore structure with depth.
ISSN:1431-9276
1435-8115
DOI:10.1017/S1431927622001209