Biochemical Engineering - Fermentation Reactors

Exercise : Fermentation Reactors - Section 2
6.
A fed-batch reactor containing 2 litre of medium and 0.1 g.l-l of biomass is fed with a medium containing 1 g.l-1 of substrate at 1 litre per hour. If after 10 hours, the concentration of biomass in the reactor was 0.2 g.l-1, then the biomass produced during the 10 hour period is
1.5 g
2.2 g
3.0 g
6.0 g
Answer: Option
Explanation:
No answer description is available. Let's discuss.

7.
Which of the following organisms will continue their metabolism at high substrate concentrations?
Pseudomonas aeruginosa
Saccharomyces cerevisiae
Bacillus subtilis
Escherichia coli
Answer: Option
Explanation:
No answer description is available. Let's discuss.

8.
Yeast is typically produced in fed batch reactors because
yeast cells produce ethanol at low glucose concentrations
yeast cells ferment at low glucose concentrations
yeast cells respire at low glucose concentrations
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

9.
Two continuous bioreactors containing the same organisms, fed with the same feed at the same dilution rate were compared. Reactor 1 started with an initial concentration of glucose of 10 g.l-1, while reactor 2 contained 0.1 g.l-1 of glucose at the start of the process then at steady state
the concentration of glucose in reactor 1 would be greater than that in reactor 2
the concentration of glucose in reactor 1 would be equal to reactor 2
the concentration of glucose in reactor 1 would always be zero.
the concentration of glucose in reactor 1 would be less than that in reactor 2
Answer: Option
Explanation:
No answer description is available. Let's discuss.

10.
In a fluidized bed reactor mixing is achieved by
gravity flow of fluid
upward movement of the incoming feed
diffusion
both (a) and (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.