Effects of shear stress on the microalgae Chaetoceros muelleri
| Autor: | Niels-Henrik Norsker, René H. Wijffels, Atze Jan van der Goot, Michiel H.A. Michels |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Chaetoceros muelleri
Bio Process Engineering Rheometer growth Photobioreactor small-scale shear Bioengineering photobioreactors phaeodactylum-tricornutum Bioreactors Algae cell-suspensions Microalgae Shear stress Geotechnical engineering Aquaculture feed Composite material Food Process Engineering VLAG Shearing (physics) Original Paper flow filtration systems biology Laminar flow General Medicine biology.organism_classification cultures hydrodynamic stress Viability Shear (geology) Photobioreactor design Stress Mechanical dinoflagellate bioluminescence biotechnology |
| Zdroj: | Bioprocess and Biosystems Engineering, 33(8), 921-927 Bioprocess and Biosystems Engineering 33 (2010) 8 Bioprocess and Biosystems Engineering |
| ISSN: | 1615-7591 |
| DOI: | 10.1007/s00449-010-0415-9 |
| Popis: | The effect of shear stress on the viability of Chaetoceros muelleri was studied using a combination of a rheometer and dedicated shearing devices. Different levels of shear stress were applied by varying the shear rates and the medium viscosities. It was possible to quantify the effect of shear stress over a wide range, whilst preserving laminar flow conditions through the use of a thickening agent. The threshold value at which the viability of algae was negatively influenced was between 1 and 1.3 Pa. Beyond the threshold value the viability decreased suddenly to values between 52 and 66%. The effect of shear stress was almost time independent compared to normal microalgae cultivation times. The main shear stress effect was obtained within 1 min, with a secondary effect of up to 8 min. |
| Databáze: | OpenAIRE |
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