Journal ArticleDOI
Oxygen transfer in mechanically agitated aqueous systems containing dispersed hydrocarbon
TLDR
In this article, the effect of dispersed n ‐dodecane or n hexadecane on the air-to-aqueous phase overall volumetric oxygen transfer coefficient in a simulated (cell-free) stirred-tank fermentor is described.Abstract:
The effect of dispersed n ‐dodecane or n ‐hexadecane on the air‐to‐aqueous phase overall volumetric oxygen transfer coefficient in a simulated (cell‐free) stirred‐tank fermentor is described. The oil volume fraction ranged from zero to 0.10; the ionic strength of the aqueous phases was varied from 0 to 0.45. The air‐to‐aqueous phase coefficients in both oil‐free (KLa) and oil‐bearing (KLa*) systems were evaluated from unsteady‐state experiments using a membrane‐covered probe to follow the aqueous phase dissolved oxygen tension.read more
Citations
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Journal ArticleDOI
Mechanism of enhanced oxygen transfer in fermentation using emulsified oxygen-vectors.
TL;DR: It has been demonstrated that the use of n‐dodecane emulsion in a culture of Aerobacter aerogenes enabled a 3.
Journal ArticleDOI
Mathematical models for design of bioreactors: applications of Kolmogoroff's theory of isotropic turbulence
Yoshinori Kawase,M. Moo-Young +1 more
TL;DR: In this paper, an attempt is made to review the current state of the art of mathematical models for design parameters in bioreactors from the viewpoint of isotropic turbulence theory.
Journal ArticleDOI
Extractive Bioconversion of 2-Phenylethanol from L-Phenylalanine by Saccharomyces cerevisiae
TL;DR: The production rates were limited by the intrinsic oxidative capacity of S. cerevisiae, and the high viscosity of the two‐phase system lowered the kla, and therefore also the productivity, so if a specific ISPR technique is planned, it consequently has to be remembered that the productivity of this bioconversion process is also quickly limited byThe kla of the fermenter at high cell densities.
Journal ArticleDOI
Mass transfer enhancement of gas absorption in oil-in-water systems: a review
Eric Dumont,Henri Delmas +1 more
TL;DR: In this paper, a review on the gas-liquid mass transfer enhancement due to the presence of a second dispersed liquid phase is presented, where the authors describe the mass transfer characteristics in a gas-liqueficient liquid-liquid system and the ability of an immiscible oil phase to influence the possible pathway for gas transfer.
Journal ArticleDOI
Mass transfer in multiphase agitated contactors
TL;DR: In this article, the batch gas absorption technique was used to measure gas volumetric mass transfer coefficients kLa for some gas-liquid and gas-water mixture, including liquid and gas.
References
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Journal ArticleDOI
The continuous phase heat and mass transfer properties of dispersions
P.H. Calderbank,M.B. Moo-Young +1 more
TL;DR: In this paper, the authors measured the interfacial area in gas-liquid dispersions and correlated the data with other published data for heat and mass transfer in liquid-liquid and solid-gas dispersions in which the dispersed phases are free to move under the action of gravity.
Journal ArticleDOI
Coalescence of gas bubbles in aqueous solutions of inorganic electrolytes
G. Marrucci,Luigi Nicodemo +1 more
TL;DR: In this paper, a discussion is made of the coalescence phenomena which occur near the distributor and a correlation is attempted which relates the average bubble diameter to the gas flow rate and to a group, G, of the electrolyte properties.
Journal ArticleDOI
The spreading of liquids on low-energy surfaces. II. Modified tetrafluoroethylene polymers
H.W Fox,William A Zisman +1 more
TL;DR: In this article, the equilibrium contact angles of a wide variety of liquids on specially prepared surfaces of halogenated derivatives of polyethylene have been calculated for the liquids which do not spread.
Journal ArticleDOI
Oxygen absorption in stirred tanks: A correlation for ionic strength effects
TL;DR: In this paper, a new correlation was given for the prediction of the volumetric coefficient for mass transfer (KLa) in stirred tanks from dispersed gas bubbles to basal salt solutions of ionic strengths representative of fermentation media.
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Mass transfer enhancement of gas absorption in oil-in-water systems: a review
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