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Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting
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SYSNO ASEP 0547809 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting Author(s) Tena, F. O. (DE)
Ranglová, Karolína (MBU-M) ORCID
Kubáč, David (MBU-M) RID, ORCID
Steinweg, C. (DE)
Thomson, C. (DE)
Masojídek, Jiří (MBU-M) RID, ORCID
Posten, C. (DE)Source Title Engineering in Life Sciences. - : Wiley - ISSN 1618-0240
Roč. 21, č. 10 (2021), s. 607-622Number of pages 16 s. Language eng - English Country DE - Germany Keywords energy ; filtration ; harvesting ; membrane ; microalgae Subject RIV EE - Microbiology, Virology OECD category Microbiology Method of publishing Open access Institutional support MBU-M - RVO:61388971 UT WOS 000694968600001 EID SCOPUS 85114662624 DOI 10.1002/elsc.202100052 Annotation The present work characterizes a submerged aerated hollow fiber polyvinylidene fluorid (PVDF) membrane (0.03 mu m) 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. Estimations on energy consumption revealed very low energy demand of 17.97 kJ/m(3) treated microalgae feed suspension (4.99 x 10(-3) kWh/m(3)) and 37.83 kJ/kg treated biomass (1.05 x 10(-2) kWh/kg), respectively, for an up-concentration from 2 to 40 g DW/L of a microalgae suspension. Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2022 Electronic address https://onlinelibrary.wiley.com/doi/epdf/10.1002/elsc.202100052
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