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Article

Influence of Ceramic Membrane Surface Characteristics on the Flux Behavior of a Complex Fermentation Broth

1
Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, 35390 Giessen, Germany
2
Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Project Group Bioresources, 35392 Giessen, Germany
3
Faculty of Biology and Chemistry, Justus-Liebig University of Giessen, 35390 Giessen, Germany
4
MANN+HUMMEL GmbH, 71636 Ludwigsburg, Germany
*
Authors to whom correspondence should be addressed.
Academic Editors: Sonia Escolastico and Cecilia Mortalò
Membranes 2021, 11(6), 402; https://doi.org/10.3390/membranes11060402
Received: 28 April 2021 / Revised: 25 May 2021 / Accepted: 26 May 2021 / Published: 28 May 2021
(This article belongs to the Special Issue Characterization of Ceramic Membranes)
The valorization of agro-industrial residues using yeasts as biocatalysts requires efficient methods for biomass separation. Filtration with ceramic membranes is suitable for this task, however, the challenge of flux decline and the unavoidable cleaning must be taken into account. We investigated the filtration of fermentation broth and its components using tubular microfiltration and ultrafiltration membranes, and hollow-fiber ultrafiltration membranes, with cut-offs of 30 and 200 nm. The steady-state flux was limited by fouling under comparable wall shear stress conditions but increased when the wall shear stress was higher. Single-component filtration with two 30 nm tubular ultrafiltration membranes, whose average surface roughness ranged from 1.0 to 3.9 µm, showed that smoother surfaces experience less biomass fouling under more intense hydrodynamic conditions. Furthermore, we showed experimentally and by scanning electron microscopy in filtration with 30 nm tubular membranes that the thickness of the first separation layer is responsible for the degree of irreversible resistance caused by the deposition of organic material in the membrane pores. The thickness of this layer should therefore be minimized without compromising mechanical stability. View Full-Text
Keywords: ceramic membrane; biomass separation; agro-industrial residue; Kluyveromyces lactis; surface roughness; composition separating layer; scanning electron microscopy ceramic membrane; biomass separation; agro-industrial residue; Kluyveromyces lactis; surface roughness; composition separating layer; scanning electron microscopy
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MDPI and ACS Style

Maguire, N.A.P.; Ebrahimi, M.; Fan, R.; Gießelmann, S.; Ehlen, F.; Schütz, S.; Czermak, P. Influence of Ceramic Membrane Surface Characteristics on the Flux Behavior of a Complex Fermentation Broth. Membranes 2021, 11, 402. https://doi.org/10.3390/membranes11060402

AMA Style

Maguire NAP, Ebrahimi M, Fan R, Gießelmann S, Ehlen F, Schütz S, Czermak P. Influence of Ceramic Membrane Surface Characteristics on the Flux Behavior of a Complex Fermentation Broth. Membranes. 2021; 11(6):402. https://doi.org/10.3390/membranes11060402

Chicago/Turabian Style

Maguire, Nicolas A. P., Mehrdad Ebrahimi, Rong Fan, Sabine Gießelmann, Frank Ehlen, Steffen Schütz, and Peter Czermak. 2021. "Influence of Ceramic Membrane Surface Characteristics on the Flux Behavior of a Complex Fermentation Broth" Membranes 11, no. 6: 402. https://doi.org/10.3390/membranes11060402

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