Exercise: Fermentation Reactors

Questions for: Fermentation Reactors

The continuous cultures are not widely used in industry because
A:
they are not suited for the production of secondary metabolites
B:
contamination or mutation can have a disastrous effect on the operation
C:
the government will not approve the licensing of pharmaceuticals produced in continuous cultures
D:
all of the above
Answer: D
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When two populations compete for a single growth limiting substrate in a continuous fermenter, which organism would not be washed out?
A:
Organism maintaining the highest substrate concentration
B:
Organism maintaining the lowest substrate concentration
C:
Both (a) and (b)
D:
Organism maintaining the moderate substrate concentration
Answer: B
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The lowest biomass yield in a culture of Escherichia coli will be in
A:
an aerated batch culture containing a initial high concentration of glucose
B:
an aerated batch reactor containing an initial low concentration of glucose
C:
an aerated fed-batch reactor having a low glucose concentration
D:
an aerated continuous reactor having a low glucose concentration
Answer: A
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Yield coefficient represents
A:
total biomass or product produced
B:
conversion efficiency of a substrate into product
C:
conversion rate of a substrate into biomass or product
D:
production time of biomass or product
Answer: B
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