Biochemical Engineering | Fermentation Kinetics

The advantage of airlift bioreactors over stirred tank bioreactors of a similar size is

Byadmin July 20, 2022

Question: The advantage of airlift bioreactors over stirred tank bioreactors of a similar size is
[A].

higher oxygen transfer rates

[B].

more uniform shear conditions

[C].

both (a) and (b)

[D].

less foaming

Answer: Option C

Explanation:

No answer description available for this question.

Biochemical Engineering | Fermentation Reactors

A continuous reactor at steady state contains 0.04 g.l-1 of biomass and 0.02 g.l-1 of phenol. The feed contained 0.1 g.l-1 of phenol. The biomass yield would be

Question: A continuous reactor at steady state contains 0.04 g.l-1 of biomass and 0.02 g.l-1 of phenol. The feed contained 0.1 g.l-1 of phenol. The biomass yield would be
[A].

0.4 g.g-1
[B].
0.5 g.g-1
[C].
1.0 g.g-1
[D].
5.0 g.g-1

Answer: Option B

Explanation:

No answer description available for this question.

Read More A continuous reactor at steady state contains 0.04 g.l-1 of biomass and 0.02 g.l-1 of phenol. The feed contained 0.1 g.l-1 of phenol. The biomass yield would be
Agitation And Aeration | Biochemical Engineering

Why vortexing is undesirable in the agitation of biological systems?

Question: Why vortexing is undesirable in the agitation of biological systems?
[A].

The collision between the cells, impeller and air bubbles will lead to cell damage
[B].
Poor mixing despite the use of high stirrer speeds
[C].
Mixing will not be in the turbulent region
[D].
All of the above

Answer: Option D

Explanation:

No answer description available for this question.

Read More Why vortexing is undesirable in the agitation of biological systems?
Biochemical Engineering | Fluid Flow

If the viscosity of a fluid decreases with the length of time that it is being mixed, then this fluid is

Question: If the viscosity of a fluid decreases with the length of time that it is being mixed, then this fluid is
[A].

newtonian
[B].
rheopectic
[C].
viscoelastic
[D].
thixotropic

Answer: Option D

Explanation:

No answer description available for this question.

Read More If the viscosity of a fluid decreases with the length of time that it is being mixed, then this fluid is
Biochemical Engineering | Enzymes And Kinetics

The plot commonly used for determining the value of Vmax is

Question: The plot commonly used for determining the value of Vmax is
[A].

Lineweaver Burk plot
[B].
Langmuir plot
[C].
Eadie Hofstee plot
[D].
all of these

Answer: Option D

Explanation:

No answer description available for this question.

Read More The plot commonly used for determining the value of Vmax is
Agitation And Aeration | Biochemical Engineering

Pure oxygen, if used instead of air will increase oxygen transfer rates because

Question: Pure oxygen, if used instead of air will increase oxygen transfer rates because
[A].

the saturation concentration of oxygen is higher
[B].
the bubble size is smaller
[C].
the oxygen transfer coefficient is larger
[D].
the partial pressure of oxygen in the gas phase is lower

Answer: Option A

Explanation:

No answer description available for this question.

Read More Pure oxygen, if used instead of air will increase oxygen transfer rates because
Agitation And Aeration | Biochemical Engineering

The average concentration of oxygen in the boundary layers surrounding the bubbles (Co*) in a reactor is normally determined by

Question: The average concentration of oxygen in the boundary layers surrounding the bubbles (Co*) in a reactor is normally determined by
[A].

ultra-small dissolved oxygen probes
[B].
laser based photographic systems
[C].
measuring the steady state concentration of oxygen in the bulk liquid prior to inoculation of the reactor
[D].
measuring the steady state concentration of oxygen in the bulk liquid after inoculation of the reactor

Answer: Option C

Explanation:

No answer description available for this question.

Read More The average concentration of oxygen in the boundary layers surrounding the bubbles (Co*) in a reactor is normally determined by

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