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Biochemical Engineering - Agitation and Aeration

Exercise : Agitation and Aeration - Section 2
16.
A cylindrical reactor fitted with Rushton Turbine has a liquid volume of 100,000 litres. It has an aspect ratio (the ratio of the channel height to the width) of 2:1. The diameter of the impeller should be approximately:
1.3 m
3.3 m
5.3 m
7.3 m
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
In the bubble boundary layer, oxygen concentration can be determined by measuring
the steady state oxygen concentration in a mixed aerated reactor before inoculation
the steady state oxygen concentration in a mixed aerated reactor after inoculation
the steady state oxygen concentration in the boundary layer using a micro-probe
volume of oxygen supplied
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Impeller damage can be minimized by
using specially designed axial flow impellers
using radial flow impellers
using Intermig impellers
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
To increase the oxygen transfer rate in a shake flask culture system, which of the following (s) is/are followed?
Liquid volume in the flask is reduced
Stirrer speed is increased
Baffled flasks are used
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
What is/are the major difference(s) between disc and turbine type stirrer?
Blades in disc type are projected out beyond the edge of disc while blades are curved one in turbine type
Turbine type requires 50 % less air than disc type for the same yield and energy consumption
Both (a) and (b)
Number of blades in the stirrer
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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