Effects of shear stress on the microalgae Chaetoceros muelleri
Open accessAbstract
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.
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Shear and tensile stresses associated with mixing must be kept at a low level in order to prevent mechanical cell damage.
“Another aspect to consider is that the shear and tensile stresses associated with mixing must be kept at a low level in order to prevent mechanical cell damage [65,108,109].”
From Modeling and Simulation of Photobioreactors with Computational Fluid Dynamics—A Comprehensive Review (2022) · cites this paper as [108]
The Results and discussion section recommends keeping shear stress in a Chaetoceros muelleri photobioreactor below the measured damage threshold; the Conclusions report reduced cell viability above that threshold. The supplied passages do not address tensile stress, so they do not support that part of the claim. Page numbers were not provided. (LLM, conf=0.86)
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- Authors
- Michels, M. H. A., van der Goot, A. J., Norsker, N.-H., & Wijffels, R. H.
- Affiliations
- HZ University of Applied Sciences (NL)
- Wageningen University & Research (NL)
- Corresponding author
- Michels, Michiel H. A.
- Venue
- Bioprocess and Biosystems Engineering
- Published
- 2010-02-27
- Volume
- 33
- Issue
- 8
- Pages
- 921-927
- ISSN
- 1615-7591 (ISSN-L)
- 1615-7605
- PMC
- PMC2938456
- OpenAlex
- W2058360163
- Cited by
- 112
- References
- 41
- Citations by year
- 2026: 8 · 2025: 3 · 2024: 5 · 2023: 1 · 2022: 7 · 2021: 7 · 2020: 11 · 2019: 6 · 2018: 6 · 2017: 12 · 2016: 9 · 2015: 8 · 2014: 7 · 2013: 6 · 2012: 7
- FWCI
- 3.28
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- cc-by-nc
- Locations
- Bioprocess and Biosystems Engineering (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- Socio-Environmental Systems Modeling (submittedVersion)
- Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Physical Sciences › Engineering › Biomedical Engineering › Fluid Dynamics and Mixing
- Physical Sciences › Chemical Engineering › Fluid Flow and Transfer Processes › Rheology and Fluid Dynamics Studies
- Keywords
- shear stress, Chaetoceros muelleri, critical shear stress, laminar flow, medium viscosity, thickening agents, microalgae cultivation
- MeSH terms
- Stress, Mechanical, Bioreactors, Microalgae
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