scholarly journals Oxygen transfer in three scales of concentric tube airlift bioreactors

2010 ◽  
Vol 51 (1-2) ◽  
pp. 40-47 ◽  
Author(s):  
M.O. Cerri ◽  
A.C. Badino
Keyword(s):  
Oxygen Transfer ◽  
Airlift Bioreactors

Oxygen Transfer and Fragmentation of Aspergillus niger Pellets in Stirred Tank and Concentric-Duct Airlift Bioreactors

2020 ◽  
Vol 16 (2) ◽  
pp. 67-74 ◽  
Author(s):  
Mariane M. Buffo ◽  
Mateus N. Esperança ◽  
Rodrigo Béttega ◽  
Cristiane S. Farinas ◽  
Alberto C. Badino
Keyword(s):  
Aspergillus Niger ◽  
Oxygen Transfer ◽  
Stirred Tank ◽  
Airlift Bioreactors

scholarly journals AIRLIFT BIOREACTOR FLUID-DYNAMIC CHARACTERIZATIONFOR THE CULTIVATION OF SHEAR STRESS SENSITIVEMICROORGANISMS

2015 ◽  
Vol 5 (2) ◽  
pp. 639-651 ◽  
Author(s):  
Márcio José Rossi ◽  
FX Nascimento ◽  
AJ Giachini ◽  
VL Oliveira ◽  
A Furigo Jr
Keyword(s):  
Shear Stress ◽  
Ectomycorrhizal Fungi ◽  
Oxygen Transfer ◽  
Fluid Dynamic ◽  
Experimental Studies ◽  
Ectomycorrhizal Fungus ◽  
Airlift Bioreactor ◽  
External Loop ◽  
Airlift Bioreactors ◽  
Superficial Gas Velocity

Airlift bioreactors are considered very efficient for aerobic cultivation of microorganisms. In particular, for the cultivation of filamentous fungi, where low shear rates may be required. In this context, the main aim of this study was to design an airlift bioreactor built with an external loop, adequate for biomass production of microbial organisms, including ectomycorrhizal fungi. A 5-L airlift bioreactor was constructed and experimental studies performed under an air-salt solution system (0.15 mol/L NaCl), in order to characterize the reactor´s fluid-dynamic in relation to the superficial gas velocity (Ug) in the range of 0.001 to 0.020 m/s. In order to evaluate the performance of the reactor, a preliminary assay was conducted with the ectomycorrhizal fungus Rhizopogonnigrescens. Better gas separationreflected in better liquid circulation and higher oxygen transfer (0.0197 1/s at 1 vvm) when compared to an operating, 2.3-L prototype airlift. According to this study, volumetric coefficients for oxygen transfer (kLa) up to 0.020 1/s (specific airflow rates of 1.0 vvm) are sufficient to promote the growth of shear stress sensitive microorganisms, such as ectomycorrhizal fungi.

scholarly journals Oxygen transfer and mixing in mechanically agitated airlift bioreactors

2002 ◽  
Vol 10 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Yusuf Chisti ◽  
Ulises J. Jauregui-Haza
Keyword(s):  
Oxygen Transfer ◽  
Airlift Bioreactors

scholarly journals Influence of volumetric oxygen transfer coefficient (kLa) on xylanases batch production by Aspergillus niger van Tieghem in stirred tank and internal-loop airlift bioreactors

2013 ◽  
Vol 80 ◽  
pp. 19-26 ◽  
Author(s):  
Michele Michelin ◽  
André Manuel de Oliveira Mota ◽  
Maria de Lourdes Teixeira de Moraes Polizeli ◽  
Daniel Pereira da Silva ◽  
António Augusto Vicente ◽  
...  
Keyword(s):  
Aspergillus Niger ◽  
Transfer Coefficient ◽  
Oxygen Transfer ◽  
Stirred Tank ◽  
Batch Production ◽  
Internal Loop ◽  
Oxygen Transfer Coefficient ◽  
Airlift Bioreactors ◽  
Volumetric Oxygen Transfer Coefficient

DISTRIBUTION OF OXYGEN TRANSFER RATE IN STIRRED BIOREACTORS WITH SIMULATED BROTHS

2008 ◽  
Vol 7 (3) ◽  
pp. 199-211 ◽  
Author(s):  
Dan Cascaval ◽  
Anca-Irina Galaction ◽  
Stefanica Camarut ◽  
Radu Z. Tudose
Keyword(s):  
Oxygen Transfer ◽  
Transfer Rate ◽  
Oxygen Transfer Rate ◽  
Stirred Bioreactors
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