What is gas liquid mass transfer in bioreactor?
What is gas liquid mass transfer in bioreactor?
The gas–liquid mass transfer into shaken bioreactors is influenced by the resistance of the closure and the resistance at the gas–liquid interface. Due to the resistance of the closure, the oxygen partial pressure within the flask is lower than the oxygen partial pressure of the surroundings [3].
What is liquid liquid mass transfer?
Liquid mass transfer or convection coefficient is a flow dependent parameter, which is evaluated by use of empirical and semiempirical correlations. One of the most well-known correlations for use in water treatment situations is the following (Chern and Chien, 2002):
What is reactor mass transfer?
Mass transfer in a stirred tank reactor with gas inducing impeller. Mass transfer experiments in the stirred tank reactor with a gas inducing impeller were carried out to study the effect of the carbon particles and electrolyte on a system in which gas is sparged into the reactor by the stirrer.
Which is an example of gas liquid mass transfer operation?
Three types of gas-liquid mass transfer operations are considered: bubble columns, spray towers, and packed columns. Application of the scaling mies reveals that the height of a bubble column in lunar- and Mars-based operations would be lower than terrestrial designs by factors of 0.64 and 0. 79 respectively.
What is diffusion mass transfer?
Diffusion is a mass transfer phenomenon that causes the distribution of a chemical species to become more uniform in space as time passes. In this case, species is a chemical dissolved in a solvent or a component in a gas mixture, such as the oxygen in air.
What is solid liquid mass transfer?
A fluid–solid sorption process consists of, essentially, three steps: (1) mass transfer of the species to be adsorbed (the adsorbate) by diffusion from the bulk fluid phase to the solid external surface (film diffusion), (2) mass transfer of the adsorbate by diffusion into both the adsorbed phase and adsorbent pores ( …
What are the types of mass transfer?
Depending on the conditions, the nature, and the forces responsible for mass transfer, four basic types are distinguished: (1) diffusion in a quiescent medium, (2) mass transfer in laminar flow, (3) mass transfer in the turbulent flow, and (4) mass exchange between phases.
Why is mass transfer important?
Mass transfer is an important phenomenon with numerous applications in food processing. Concentration gradients of a substance in a food cause diffusion of that substance from high to low concentration.
Does temperature affect mass transfer?
Although temperature changes affected the mass transfer coefficients in the membrane phase as well as in the feed phase, the mass transfer coefficients in the membrane phase were found to be less than the mass transfer coefficients in the feed phase.
Which of the following is true about rate of mass transfer in liquid?
Which of the following is true for mass transfer across liquid-liquid interface? Explanation: For mass transfer across liquid-liquid interface 1/Kx(2) = 1/KAkx(1) + 1/kx(2) holds true.
What is difference between mass transfer and diffusion?
The main difference between mass transfer and diffusion is that mass transfer may or may not involve a concentration gradient whereas diffusion does involve the movement of a solute down a concentration gradient.
What are the three modes of mass transfer?
There are three basic mechanisms of mass transport:
- Diffusion – defined as the spontaneous movement of any material from where it is to where it is not.
- Migration – the movement of charged particles in an electric field.
- Convection – movement of material contained within a volume element of stirred (hydrodynamic) solution.