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Biochemical Engineering - Agitation and Aeration

Exercise : Agitation and Aeration - Section 2
1.
When the height of an aerated bioreactor is increased, it will increase the oxygen transfer rate by
increasing the partial pressure of oxygen at the base of the reactor
decreasing the saturation concentration of oxygen in the reactor
decreasing the gas-holdup
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Which of the following is correct for the off-centre impellers?
Off-centre impellers can be used with any size reactor
Off-centre impellers should only be used with reactors with volumes less than 10 m3
The impeller should never be placed in an off-centre position
Off-centre impellers can be used when volume is greater than 10 m3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The power required by an impeller in a gas sparged system compare to the power required by impeller operating at same speed in a gas free liquid is usually
lesser
higher
same
may be lesser or higher depending upon the geometry
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Which of the following stirrer requires least amount of energy for same yield?
Mig
Intermig
Turbine
Disc
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
A reactor has a total volume of 50,000 litres. If it has a headspace volume of 10,000 litres, then volume of liquid in the reactor will be
10,000 l
20,000 l
30,000 l
40,000 l
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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