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Biochemical Engineering - Agitation and Aeration

Exercise : Agitation and Aeration - Section 2
21.
In the design of a paddle agitator, the ratio of paddle diameter to tank diameter is normally taken as
0.1
0.8
0.25
0.5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
The oxygen absorption rate can be determined by
sodium sulfite oxidation method
dynamic gassing out technique
direct measurement
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Industrial paddle agitators turn at the speed of
20 and 150 rpm
150 and 300 rpm
400 and 800 rpm
1150 rpm
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
The dynamic technique is based on the
oxygen material balance in an aerated batch fermenter during the growth of microorganisms
change of the oxygen concentration
oxidation of the sodium sulfite to sodium sulfate
oxygen material balance in a fermenter
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
The addition of antifoams to an aerated bioreactor will decrease oxygen transfer rates because antifoams
increase the tendency of bubbles to coalesce
tend to accumulate in the gas liquid interface
reduce the surface tension of the liquid
All of the above answers
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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