Article (Scientific journals)
Experimental study of transient particle suspension in bioreactors using a light attenuation technique
Maillot, Charlotte; Delafosse, Angélique; De Isla, Natalia et al.
2024In Chemical Engineering Science, 285, p. 119633
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Keywords :
Bioreactor; Light attenuation technique; Microcarrier; Suspension; Agitation rates; Distribution of particles; Light attenuation; Mesenchymal stromal cells; Microcarriers; Particles concentration; Particles suspension; Re-suspension; Temporal evolution; Chemistry (all); Chemical Engineering (all); Industrial and Manufacturing Engineering
Abstract :
[en] The culture of mesenchymal stromal cells relies on the use of suspended microcarriers as adhesion supports. During the particle suspension phases, the temporal evolution of the spatial distribution of particle concentrations is generally poorly characterized. In this study, the light attenuation technique was used to access this distribution and the duration of particle homogenization. Considering the minimal agitation rate Nref for which particle suspension was observed for all the microcarrier concentrations 〈C〉 studied, the results showed that using an agitation frequency close to Nref significantly increased the homogenization duration compared to N≃1.7×Nref. The transient microcarrier overconcentration was also determined locally. At N=Nref, the resuspension time was negatively impacted by 〈C〉, which also resulted in longer particle overconcentrations. A time-integral particle overconcentration term was considered to estimate the severity of inter-microcarrier collisions. The results suggested that increased agitation could limit time-cumulative overconcentrations beyond a particle concentration of 3 g/L.
Disciplines :
Chemical engineering
Biotechnology
Author, co-author :
Maillot, Charlotte;  Université de Lorraine, CNRS, LRGP, Nancy, France
Delafosse, Angélique ;  Université de Liège - ULiège > Department of Chemical Engineering > PEPs - Products, Environment, and Processes
De Isla, Natalia;  Ingénierie Moléculaire et Physiopathologie Articulaire, Université de Lorraine, CNRS UMR 7365, Vandoeuvre-lès-Nancy, France
Olmos, Eric ;  Université de Lorraine, CNRS, LRGP, Nancy, France
Toye, Dominique  ;  Université de Liège - ULiège > Department of Chemical Engineering > PEPs - Products, Environment, and Processes
Language :
English
Title :
Experimental study of transient particle suspension in bioreactors using a light attenuation technique
Publication date :
05 March 2024
Journal title :
Chemical Engineering Science
ISSN :
0009-2509
eISSN :
1873-4405
Publisher :
Elsevier
Volume :
285
Pages :
119633
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
UL - University of Lorraine
Available on ORBi :
since 01 July 2025

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