Exercise: Fermentation Reactors

Questions for: Fermentation Reactors

Saccharomyces cerevisiae is being grown in a chemostat converts glucose to biomass, ethanol, glycerol and carbon dioxide. At steady state, the concentration of glucose, biomass, ethanol and glycerol will
A:
decrease with time
B:
increase with time
C:
be constant
D:
change randomly with time
Answer: C
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For organisms growing in a chemostat, the specific growth rate
A:
cannot be determined
B:
can be determined from the dilution rate
C:
equals to the maximum specific growth rate of the culture
D:
none of the above
Answer: B
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A continuous bioreactor in which only the flow rate is used to control the rate of cell or product productivity is called
A:
turbidostat
B:
chemostat
C:
level stat
D:
pH
Answer: B
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Which of the statement is true for continuous reactor at steady state?
A:
The rates of biomass, substrate and product concentrations are zero
B:
Biomass, substrate and product concentrations are zero
C:
Biomass, substrate and product concentrations do not change with time
D:
Biomass, substrate and product concentrations change with time
Answer: C
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Immobilized cell reactors for wastewater treatment have the advantage of having/being
A:
higher cell concentration
B:
more stable and prevent washout
C:
higher dilution rate before the cells washout
D:
all of the above
Answer: D
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