Exercise: Fermentation Reactors
Questions for: Fermentation Reactors
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
A:
the concentration of glucose in reactor 1 would be greater than that in reactor 2
B:
the concentration of glucose in reactor 1 would be equal to reactor 2
C:
the concentration of glucose in reactor 1 would always be zero.
D:
the concentration of glucose in reactor 1 would be less than that in reactor 2
Answer: B
No answer description is available. Let's discuss.
Yeast is typically produced in fed batch reactors because
A:
yeast cells produce ethanol at low glucose concentrations
B:
yeast cells ferment at low glucose concentrations
C:
yeast cells respire at low glucose concentrations
D:
all of the above
Answer: C
No answer description is available. Let's discuss.
Discuss About this Question.
Which of the following organisms will continue their metabolism at high substrate concentrations?
A:
Pseudomonas aeruginosa
B:
Saccharomyces cerevisiae
C:
Bacillus subtilis
D:
Escherichia coli
Answer: A
No answer description is available. Let's discuss.
Discuss About this Question.
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
A:
1.5 g
B:
2.2 g
C:
3.0 g
D:
6.0 g
Answer: B
No answer description is available. Let's discuss.
Discuss About this Question.
A strain of Escherichia coli has a maximum specific growth rate of 0.8 h-1 on a glucose based medium. If this organism is being grown in a chemostat with a dilution rate of 1.2 h-1, then at steady state the concentration of E. coli in the same medium will
A:
increase
B:
be zero
C:
change randomly
D:
decrease
Answer: B
No answer description is available. Let's discuss.
Discuss About this Question.
Ad Slot (Above Pagination)
Discuss About this Question.