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Linking maximal shear rate and energy dissipation/circulation function in airlift bioreactors
(2022-01-01)
The interest in pneumatic bioreactors is related to their good mass transfer capacity, as well as lower operating costs, due to the simple mechanical structure. Knowledge of the transport phenomena and hydrodynamics of ...
Sparger design as key parameter to define shear conditions in pneumatic bioreactors
(Elsevier B.V., 2020-04-15)
The average shear rate (<(gamma)over dot>(av)) is a parameter used to characterize the shear environment in bioreactors, enabling comparison of the performances of different bioreactor models in terms of microorganism ...
Mass Transfer Performance of Ethanol Removal by CO2 Stripping in Different Pneumatic Bioreactors
(2020-04-01)
The hydrodynamics and mass transfer characteristics of ethanol stripping with CO2 were evaluated for a 2.0-L pneumatic bioreactor operated in bubble column (BC), concentric-tube airlift (CTA), and split-cylinder airlift ...
Aeration step method for k(L)a measurement under growth conditions in pneumatic bioreactors
(Wiley-Blackwell, 2019-07-01)
Background Determination of the volumetric oxygen transfer coefficient (k(L)a) plays an important role in the design and characterization of bioreactors. Among all methods available, few techniques are suitable for the ...
Avaliação de parâmetros globais de desempenho de biorreatores pneumáticos através de fluidodinâmica computacional
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Engenharia Química - PPGEQCâmpus São Carlos, 2015-03-25)
Pneumatic bioreactors are devices free of moving parts which have the purpose
of converting raw materials in bio-products of commercial interest by the action of enzymes
or cells. They are promising in the biochemical ...
A new approach for k(L)a determination by gassing-out method in pneumatic bioreactors
(Wiley-Blackwell, 2016-12-01)
BACKGROUND: Determination of the volumetric oxygen transfer coefficient (k(L)a) is very important for bioreactor design and process analysis. Among all the methods available, the gassing-out technique is one of the simplest ...
Avaliação de parâmetros de desempenho de três modelos de biorreatores pneumáticos de bancada
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Química - PPGQ, 2010-02-25)
Due to the large number of functional advantages, pneumatic bioreactors have drawn attention in the biotechnology field, being more promising than stirred and aerated tank bioreactors. Parameters such as global gas hold-up ...
A new approach to heart valve tissue engineering: mimicking the heart ventricle with a ventricular assist device in a novel bioreactor
(WILEY-BLACKWELL, 2011)
The `biomimetic` approach to tissue engineering usually involves the use of a bioreactor mimicking physiological parameters whilst supplying nutrients to the developing tissue. Here we present a new heart valve bioreactor, ...
Characterization of packed-bed in the downcomer of a concentric internal-loop airlift bioreactor
(2022-04-01)
A packed-bed basket containing corn cob powder was used for the adaptation of a concentric-tube airlift reactor for enzymatic reactions. The bed was inserted in the downcomer region of the bioreactor generating a decrease ...