Effect of hydrodynamics on the formation and removal of microalgal biofilm in photobioreactors
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F20%3A00343962" target="_blank" >RIV/68407700:21220/20:00343962 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.biosystemseng.2020.10.014" target="_blank" >https://doi.org/10.1016/j.biosystemseng.2020.10.014</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.biosystemseng.2020.10.014" target="_blank" >10.1016/j.biosystemseng.2020.10.014</a>
Alternative languages
Result language
angličtina
Original language name
Effect of hydrodynamics on the formation and removal of microalgal biofilm in photobioreactors
Original language description
To prevent the formation of biofilm or to remove already formed biofilm on the transparent walls of the closed cultivation systems, it is important to ensure that there are sufficient wall shear stresses to disrupt the stability of the biofilm. A pilot-scale flat-panel photobioreactor and laboratory tubular system were used to determine the critical value of the wall shear stress. The formation of biofilm on transparent walls of the cultivation systems reduces light penetration into the cultivation medium, which can subsequently reduce the production of microalgae, since light radiation a key parameter influencing the growth of microalgae. To study the influence of hydrodynamic conditions on the prevention of biofilm formation, a numerical model of a flat-panel photobioreactor was validated based on the experimental data. Using the validated model, a critical value of wall shear stress that above which avoids the formation of biofilm was defined to be 0.2 Pa. To refine the values from the numerical model, and to investigate the influence of hydrodynamic conditions on the process of disruption of the formed and stabilized biofilm, a simple experimental tubular system with the one-dimensional flow was developed. For one-dimensional flow, it is easier to describe the hydrodynamic behaviour and more precisely define the parameters influencing biofilm formation. The experiments in this simplified tubular system were focused on removing already formed biofilm. The formed biofilm on the transparent wall was completely removed from the surface when the wall shear stress reached a value of 53 Pa. However, the stability of the biofilm was already disturbed at a value of 6 Pa. The resulting values of critical wall shear stress could be used to select the operating conditions of the cultivation systems or to adjust their geometry affecting the hydrodynamic conditions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20402 - Chemical process engineering
Result continuities
Project
<a href="/en/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Research centre for low-carbon energy technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Biosystems Engineering
ISSN
1537-5110
e-ISSN
1537-5129
Volume of the periodical
200
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
315-327
UT code for WoS article
000598489200009
EID of the result in the Scopus database
2-s2.0-85095745571