Exercise: Fermentation Kinetics

Questions for: Fermentation Kinetics

The maximum specific growth rate (μm) of an organism in batch culture is equal to slope of a plot of
A:
In [biomass] against time for exponential phase data only
B:
In [biomass] against time
C:
biomass against time
D:
biomass against time for stationary phase data only
Answer: A
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The high oxygen transfer efficiencies of airlift bioreactors is due to
A:
the large aspect ratio of the reactor, which leads to a high gas hold-up
B:
the large aspect ratio of the reactor, which leads to a high oxygen solubility at the base of the reactor
C:
the draft tube, which reduces bubble coalescence in the reactor
D:
all of the above
Answer: D
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The height to diameter ratio (H/D) for the column fermenters is
A:
<3
B:
>3
C:
<1.5
D:
>1.5
Answer: B
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The Monod Model relates
A:
substrate utilized with the biomass consumption
B:
specific growth rate to the substrate availability
C:
yield with the biomass utilization
D:
the biomass concentration with specific growth rate
Answer: B
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The function(s) of the draft tube in an airlift bioreactor is
A:
to reduce bubble coalescence
B:
to improve circulation
C:
to even out shear conditions throughout the reactor
D:
all of the above
Answer: D
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