Journal ArticleDOI
Power consumption, local and average volumetric mass transfer coefficient in multiple-impeller stirred bioreactors for xanthan gum solutions
Minghui Xie,Jianye Xia,Zhou Zhen,Guo-zhong Zhou,Ju Chu,Yingping Zhuang,Siliang Zhang,Henk Noorman +7 more
TLDR
In this article, power consumption, local and average volumetric mass transfer coefficient (k L a ) were compared for six impeller combinations in a 50L perspex tank with xanthan gum solutions.About:
This article is published in Chemical Engineering Science.The article was published on 2014-03-17. It has received 47 citations till now. The article focuses on the topics: Rushton turbine & Impeller.read more
Citations
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Journal ArticleDOI
Influence of impeller diameter on local gas dispersion properties in a sparged multi-impeller stirred tank
TL;DR: In this paper, the effect of impeller diameter on gas dispersion in a stirred tank of 0.48 m was investigated by experimental and CFD simulation methods, and the power consumption and total gas holdup were measured for the same impeller configuration with four different diameters.
Journal ArticleDOI
Power consumption and mass transfer in a gas-liquid-solid stirred tank reactor with various triple-impeller combinations
TL;DR: In this article, the effects of impeller combination on gassed power consumption and volumetric mass transfer coefficient k L a in a baffled gas-liquid-solid stirred tank reactor with air, water, and 12vol% of glass beads were studied.
Journal ArticleDOI
Analysis of power consumption for gas dispersion in non-Newtonian fluids with a coaxial mixer: New correlations for Reynolds and power numbers
TL;DR: In this paper, the power consumption for the gas dispersion in carboxymethyl cellulose solution, a power-law non-Newtonian fluid, with a coaxial mixer consisting of an anchor impeller and two central impellers as a function of the speed ratio (central impeller speed/anchor speed), fluid rheology, pumping direction of the central impeller, and the rotation mode (co-rotating vs counterrotating) was assessed using both experimental and numerical approaches.
Book ChapterDOI
Aeration and agitation
TL;DR: In this article, the complexity of providing a fermentation organism with dissolved oxygen at both the required concentration and rate to satisfy its oxygen demand is discussed, and the importance of the volumetric mass transfer coefficient in the design and operation of a fermentation is explained.
Journal ArticleDOI
Multiphase Stirred Tank Bioreactors – New Geometrical Concepts and Scale‐up Approaches
TL;DR: Current developments in the field of impeller geometries and findings for multistage configurations with a specific view on aerated stirred tanks are reviewed, and quantities usable for scale-up, specifically applicable in this field are discussed.
References
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Journal ArticleDOI
Bioreactor scale-up and oxygen transfer rate in microbial processes: An overview
TL;DR: The present work is aimed at the reviewing of the oxygen transfer rate (OTR) in bioprocesses to provide a better knowledge about the selection, design, scale-up and development of bioreactors.
Journal ArticleDOI
Xanthan gum: production, recovery, and properties.
TL;DR: This review focuses on various aspects of xanthan production, including the producing organism Xanthomonas campestris, the kinetics of growth and production, the downstream recovery of the polysaccharide, and the solution properties ofxanthan.
Journal ArticleDOI
Agitation of non‐Newtonian fluids
TL;DR: In this article, a general relationship between impeller speed and the shear rate of a non-Newtonian fluid has been developed, and the resulting relationship was then used to interpret and correlate power-consumption data on three non-newtonian fluids by use of a generalized form of the conventional power-number-Reynoldsnumber plot for Newtonians.
Journal ArticleDOI
Review of Measuring Methods and Results in Nonviscous Gas-Liquid Mass Transfer in Stirred Vessels
Journal ArticleDOI
Hydrodynamics and mass transfer in non‐Newtonian solutions in a bubble column
TL;DR: In this paper, the authors measured the gas holdups, volumetric mass transfer coefficients, and specific gas-liquid interfacial areas in CMC solutions using a bubble column of diameter 0.305 m and height 3.4 m.