Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting
Abstract 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 a...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2021-10-01
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| Series: | Engineering in Life Sciences |
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| Online Access: | https://doi.org/10.1002/elsc.202100052 |
| _version_ | 1818896862598397952 |
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| author | Franziska Ortiz Tena Karolína Ranglová David Kubač Christian Steinweg Claudia Thomson Jiří Masojidek Clemens Posten |
| author_facet | Franziska Ortiz Tena Karolína Ranglová David Kubač Christian Steinweg Claudia Thomson Jiří Masojidek Clemens Posten |
| author_sort | Franziska Ortiz Tena |
| collection | DOAJ |
| description | Abstract 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, Jc) 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 Jc‐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/m3 treated microalgae feed suspension (4.99 × 10−3 kWh/m3) and 37.83 kJ/kg treated biomass (1.05 × 10−2 kWh/kg), respectively, for an up‐concentration from 2 to 40 g DW/L of a microalgae suspension. |
| first_indexed | 2024-12-19T19:07:02Z |
| format | Article |
| id | doaj.art-fa09095fa04e41fbacc893aa32d3e2f7 |
| institution | Directory Open Access Journal |
| issn | 1618-0240 1618-2863 |
| language | English |
| last_indexed | 2024-12-19T19:07:02Z |
| publishDate | 2021-10-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Engineering in Life Sciences |
| spelling | doaj.art-fa09095fa04e41fbacc893aa32d3e2f72022-12-21T20:09:25ZengWiley-VCHEngineering in Life Sciences1618-02401618-28632021-10-01211060762210.1002/elsc.202100052Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvestingFranziska Ortiz Tena0Karolína Ranglová1David Kubač2Christian Steinweg3Claudia Thomson4Jiří Masojidek5Clemens Posten6Institute of Process Engineering in Life Sciences Karlsruhe Institute of Technology (KIT) Karlsruhe GermanyLaboratory of Algal Biotechnology Centre Algatech Czech Academy of Science Institute of Microbiology Třeboň Czech RepublicLaboratory of Algal Biotechnology Centre Algatech Czech Academy of Science Institute of Microbiology Třeboň Czech RepublicInstitute of Process Engineering in Life Sciences Karlsruhe Institute of Technology (KIT) Karlsruhe GermanyiSeaMC GmbH Bremen GermanyLaboratory of Algal Biotechnology Centre Algatech Czech Academy of Science Institute of Microbiology Třeboň Czech RepublicInstitute of Process Engineering in Life Sciences Karlsruhe Institute of Technology (KIT) Karlsruhe GermanyAbstract 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, Jc) 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 Jc‐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/m3 treated microalgae feed suspension (4.99 × 10−3 kWh/m3) and 37.83 kJ/kg treated biomass (1.05 × 10−2 kWh/kg), respectively, for an up‐concentration from 2 to 40 g DW/L of a microalgae suspension.https://doi.org/10.1002/elsc.202100052energyfiltrationharvestingmembranemicroalgae |
| spellingShingle | Franziska Ortiz Tena Karolína Ranglová David Kubač Christian Steinweg Claudia Thomson Jiří Masojidek Clemens Posten Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting Engineering in Life Sciences energy filtration harvesting membrane microalgae |
| title | Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting |
| title_full | Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting |
| title_fullStr | Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting |
| title_full_unstemmed | Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting |
| title_short | Characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting |
| title_sort | characterization of an aerated submerged hollow fiber ultrafiltration device for efficient microalgae harvesting |
| topic | energy filtration harvesting membrane microalgae |
| url | https://doi.org/10.1002/elsc.202100052 |
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