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Biochemical Engineering - Fermentation Reactors

Exercise : Fermentation Reactors - Section 1
31.
The main reason for production of antibiotics in fed batch reactors is
the presence of precursors is often toxic to the cells
higher yields when cells enter the stationary phase
higher yields when cell growth slows
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Fed batch reactors is used to produce vinegar because
it can maintain low ethanol concentrations
it can maintain low acetic acid concentrations
acetic acid bacteria tend to ferment at high ethanol concentrations
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
When a culture of fermenting yeast becomes metabolically uncoupled, ethanol
becomes a secondary metabolite
production becomes growth associated
production becomes non-growth associated
becomes a growth nutrient
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Mixing profiles closest to plug flow are observed in
continuous packed bed reactor
stirred tank reactor with biomass recycles
continuous fluidized bed bioreactor
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
On a glucose medium, the growth of an organism is characterized by the following Monod model and stoichiometric parameters μm = 0.3 h-1, Ks =0.05 g.l-1 and Yxs = 0.3 g.g-1 When this organism is grown in a 2 litre continuous on a medium containing 10 g.l-1 of glucose added at 1 l.h-1, the steady state concentration of biomass in the reactor will be
0 g.l-1
0.4 g.l-1
0.5 g.l-1
10 g.l-1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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