An Introduction to Bioreactor Hydrodynamics and Gas-Liquid by Enes Kadic

By Enes Kadic

Reviews and compares the key different types of bioreactors, defines their execs and cons, and identifies study wishes and figures of benefit that experience but to be addressed

  • Describes universal modes of operation in bioreactors
  • Covers the 3 universal bioreactor kinds, together with stirred-tank bioreactors, bubble column bioreactors, and airlift bioreactors
  • Details much less universal bioreactors varieties, together with fastened mattress bioreactors and novel bioreactor designs
  • Discusses merits and downsides of every bioreactor and offers a approach for optimum bioreactor choice in response to present method needs
  • Reviews the issues of bioreactor choice globally whereas contemplating all bioreactor innovations instead of targeting one particular bioreactor type

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Additional resources for An Introduction to Bioreactor Hydrodynamics and Gas-Liquid Mass Transfer

Example text

X-ray tubes also provide a smaller spot size when compared to γ-ray sources of equivalent strength, which also provides improved spatial resolution. Thatte et al. 57-m-diameter cylindrical tank equipped with a pitched blade downflow turbine or a disk turbine. For both impellers, the average gas holdup was obtained by integrating the local gas holdup and it matched well with the results obtained by visual observations. The reproducibility of the measurements was within ±10%. Khopkar et al. 2-m-diameter cylindrical tank with a shaft that extended to the vessel bottom.

Estimating gas holdup by measuring the mixture or liquid level before and after DGD). 7) MEASURING BIOREACTOR HYDRODYNAMIC CHARACTERISTICS 25 where ???? and p are the local gas holdup and pressure at position z, respectively, ????L is the liquid density, g is the acceleration due to gravity, Dc is the column inner diameter, UL is the superficial liquid velocity, and ????w is the wall shear stress. Hills (1976) obtained a similar expression assuming a pseudo-homogeneous two-phase mixture. The first term on the right-hand side of Eq.

The tracer techniques commonly used to determine VL are based on determining the time it takes for a given tracer to travel a set distance. , MEASURING BIOREACTOR HYDRODYNAMIC CHARACTERISTICS 23 1984; Chisti, 1989; Jones, 2007; Van’t Riet and Tramper, 1991). 5) While the superficial liquid velocity is a function of riser and downcomer gas holdup, it also influences these holdups. Hence, for a given airlift reactor geometry, the superficial liquid velocity is a function of gas holdup. The superficial liquid velocity can only be changed in this reactor through geometry modifications (which will also affect gas holdup values) or through the use of a throttling device (Popovic and Robinson, 1988).

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