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Biochemical Engineering - Fermentation Reactors

Exercise : Fermentation Reactors - Section 1
16.
A continuous reactor has a dilution rate of 0.5 h-1. Its residence time would be
ln(2)/0.5
ln(2) x 0.5
0.5 h
2 h
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Which of the following is used to calculate mass of substrate in the reactor?
Flow rate x substrate concentration in the reactor
Volume of reactor x substrate concentration in reactor
Flow rate x mass of reactor
Volume of reactor x Flow rate
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
If biomass yields are constant, then the biomass productivity of a culture grown in continuous reactor will
always decrease with dilution rate
increase with dilution rate until washout
remain constant irrespective of the dilution rate
decrease with dilution rate until washout
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Low dissolved oxygen concentrations leads to
low biomass yields
high biomass yields
no effect on biomass yields
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
In a continuous reactor, the medium contains 40 g.l-1 of maltose and the medium flow rate is 10 litres per hour and the effluent contains 20 g.l-l of lactate. What is the productivity of lactate production from this reactor?
50 g maltose.l-1
50 g lactate.l-1
200 g maltose.l-1
200 g lactate.l-1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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