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Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting

Ortiz Tena, Franziska; Ranglová, Karolína; Kubač, David; Steinweg, Christian ORCID iD icon 1; Thomson, Claudia; Masojidek, Jiří; Posten, Clemens 1
1 Institut für Bio- und Lebensmitteltechnik (BLT), Karlsruher Institut für Technologie (KIT)


The present work characterizes a submerged aerated hollow fiber polyvinylidene fluorid (PVDF) membrane (0.03 μm) device (Harvester) designed for the ultrafiltration (UF) of microalgae suspensions. Commercial baker's yeast served as model suspension to investigate the influence of the aeration rate of the hollow fibers on the critical flux (CF, J$_{c}$) for different cell concentrations. An optimal aeration rate of 1.25 vvm was determined. Moreover, the CF was evaluated using two different Chlorella cultures (axenic and non-axenic) of various biomass densities (0.8–17.5 g DW/L). Comparably high CFs of 15.57 and 10.08 L/m/$^{2}$/h were measured for microalgae concentrations of 4.8 and 10.0 g DW/L, respectively, applying very strict CF criteria. Furthermore, the J$_{c}$-values correlated (negative) linearly with the biomass concentration (0.8–10.0 g DW/L). Concentration factors between 2.8 and 12.4 and volumetric reduction factors varying from 3.5 to 11.5 could be achieved in short-term filtration, whereat a stable filtration handling biomass concentrations up to 40.0 g DW/L was feasible. Measures for fouling control (aeration of membrane fibers, periodic backflushing) have thus been proven to be successful. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000137774
Veröffentlicht am 22.09.2021
DOI: 10.1002/elsc.202100052
Zitationen: 11
Web of Science
Zitationen: 11
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Bio- und Lebensmitteltechnik (BLT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2021
Sprache Englisch
Identifikator ISSN: 1618-0240, 1618-2863
KITopen-ID: 1000137774
Erschienen in Engineering in Life Sciences
Verlag John Wiley and Sons
Band 21
Heft 10
Seiten 607-622
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 12.09.2021
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