Oxygen transfer in three scales of concentric tube airlift bioreactors

Cerri, Marcel O.; Badino, Alberto Colli

doi:10.1016/j.bej.2010.04.013

Cited by 32 publications

(15 citation statements)

References 30 publications

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“…Terasaka and Shibata demonstrated that an increase in the viscosity drastically decreases the k L a ; similar results were obtained in our studies when using 1.80% xanthan gum in the absence of agitation and at a same range of aeration. Conversely, comparative studies made by Cerri and Badino, using three airlift bioreactors of different volumes and with the same similarities obtained higher k L a value with xanthan gum solutions than with glycerol solutions. These figures strongly disagree with the ones obtained by Terasaka and Shibata, and also with our studies, in which the k L a did not exceed the value of 0.005 s −1 .…”

Section: Resultscontrasting

confidence: 87%

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Influence of impeller type on hydrodynamics and gas‐liquid mass‐transfer in stirred airlift bioreactor

et al. 2015

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The influence of impeller type in a mechanically stirred airlift bioreactor was analyzed in relation to the non‐Newtonian viscous fluids. The agitation was carried out through a marine impeller (axial impeller) and a paddle impeller (radial impeller) located along with the gas sparger in the region comprised by the riser. The bioreactor was sparged with air under different velocities (0.036–0.060 m s−1). Carboxymethylcellulose 1.94% and xanthan 1.80% were used as a fluid model. The gas holdup and volumetric mass‐transfer coefficient increased in up to five and three times, respectively, when compared to a conventional airlift bioreactor; however, better results were obtained when the straight paddle impeller type was used. The results suggest that the studied bioreactor can be used successfully in viscous fluid, and it can be more efficient than conventional airlift bioreactors. The results obtained suggest the use of radial impellers. © 2015 American Institute of Chemical Engineers AIChE J, 61: 3159–3171, 2015

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Section: Resultscontrasting

confidence: 87%

“…Some authors reported a low oxygen solubilization capacity in viscous solutions using airlift bioreactors and bubble columns . Our studies demonstrated that the increased viscosity decreases the k L a .…”

Section: Resultssupporting

confidence: 58%

Influence of impeller type on hydrodynamics and gas‐liquid mass‐transfer in stirred airlift bioreactor

et al. 2015

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“…The internal loop airlift bioreactor (ILAB) was redesigned with modification from Cerri & Badino (2010) . The culture vessel was 9 cm in diameter and 45 cm in height, with a working volume of 2 L. The internal draft tube was made of borosilicate glass with 26 cm height and 5 cm diameter.…”

Section: Methodsmentioning

confidence: 99%

Effectiveness of various bioreactors for thraustochytrid culture and production (Aurantiochytruim limacinum BUCHAXM 122)

Sirirak

Powtongsook

Suanjit

et al. 2021

PeerJ

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This study aimed to develop bioreactors for cultivation of thraustochytrid, Aurantiochytrium limacinum BUCHAXM 122, that are low in cost and simple to operate. Obtaining maximum biomass and fatty acid production was a prerequisite. Three bioreactor designs were used: stirred tank bioreactor (STB), bubble bioreactor (BB) and internal loop airlift bioreactor (ILAB). The bioreactors were evaluated for their influence on oxygen mass transfer coefficient (kLa), using various spargers, mixing speed, and aeration rates. Biomass and DHA production from STB, BB, ILAB were then compared with an incubator shaker, using batch culture experiments. Results showed that a bundle of eight super-fine pore air stones was the best type of aeration sparger for all three bioreactors. Optimal culture conditions in STB were 600 rpm agitation speed and 2 vvm aeration rate, while 2 vvm and 1.5 vvm aeration provided highest biomass productivity in BB and ILAB, respectively. Antifoam agent was needed for all reactor types in order to reduce excessive foaming. Results indicated that with optimized conditions, these bioreactors are capable of thraustochytrid cultivation with a similar efficiency as cultivation using a rotary shaker. STB had the highest kLa and provided the highest biomass of 43.05 ± 0.35 g/L at 48 h. BB was simple in design, had low operating costs and was easy to build, but yielded the lowest biomass (27.50 ± 1.56 g/L). ILAB, on the other hand, had lower kLa than STB, but provided highest fatty acid productivity, of 35.36 ± 2.51% TFA.

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“…When dealing with studies related to gases absorption in liquid phases using bubbling equipment, the volumetric mass-transfer coefficient (defined as the product of mass-transfer coefficient and gas-liquid specific interfacial area) is generally used to study the masstransfer processes [4][5][6]. The fact that this parameter is the product of others implies additional difficulties to obtain conclusions about the influences caused by the operation variables.…”

Section: Introductionmentioning

confidence: 99%

Chemical Reaction Effect upon Gas–Liquid Interfacial Area in a Bubble Column Reactor

Blanco

García-Abuín

Gómez‐Díaz

et al. 2013

International Journal of Chemical Reactor Engineering

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This work analyses the influence of different experimental conditions over important hydrodynamic parameters of a bubble column reactor, such as bubble size distribution, gas hold-up and the gas-liquid interfacial area. The influence of gas flow-rate (18-40 L h -1 ) and reagent concentration (0-0.5 mol L -1 ) in the liquid phase upon these hydrodynamic parameters have been studied. The influence of experiment time must also be taken into account due to non-steady-state regime. Under these considerations, the chemical absorption rate changes throughout time, and it produces important changes upon the global absorption process, due to modifications in the gas-liquid interfacial area. The presence of a fast reaction in the liquid bulk has the highest influence upon interfacial area.

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Oxygen transfer in three scales of concentric tube airlift bioreactors

Cited by 32 publications

References 30 publications

Influence of impeller type on hydrodynamics and gas‐liquid mass‐transfer in stirred airlift bioreactor

Influence of impeller type on hydrodynamics and gas‐liquid mass‐transfer in stirred airlift bioreactor

Effectiveness of various bioreactors for thraustochytrid culture and production (Aurantiochytruim limacinum BUCHAXM 122)

Chemical Reaction Effect upon Gas–Liquid Interfacial Area in a Bubble Column Reactor

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