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Biochemical Engineering - Fermentation Reactors

Exercise : Fermentation Reactors - Section 2
16.
Production of organic acids in batch culture is generally growth associated phase followed by non-growth associated production. The probable reason for this is that
organic acids uncouple catabolism from anabolism
biomass yields increase as the fermentation proceeds
organic acids are secondary metabolites
high concentrations of organic acid promote the growth of the microbial population
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
The concentration of biomass in a continuous stirred tank reactor is 20 g dry weight per litre. What would be the concentration of biomass in the effluent?
Greater than 20 g dry weight per litre
Approximately 20 g dry weight per litre
Lesser than 20 g dry weight per litre
More than 30 g dry weight per litre
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The ideal tubular-flow fermenter without radial variations is called a
plug flow fermenter
continuous stirred tank fermenter (CSTF)
column fermenter
any intensity of dilution rate near the wash out points
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Pseudo-steady state in a continuous reactor refers to a reactor in which
Pseudomonads are being cultured
concentration oscillate around a mean value
concentration increase with time
concentration decrease with time
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The toxicity of organic acids to cells
enhances as the pH falls
reduces as the pH falls
is not affected by pH
is highest at pH 7.0
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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