The lowest biomass yield in a culture of Escherichia coli will be in
Options
A. an aerated batch culture containing a initial high concentration of glucose
B. an aerated batch reactor containing an initial low concentration of glucose
C. an aerated fed-batch reactor having a low glucose concentration
D. an aerated continuous reactor having a low glucose concentration
Correct Answer
an aerated batch culture containing a initial high concentration of glucose
Fermentation Reactors problems
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1. In batch culture, protogon is produced from peptone during the stationary phase with a yield of 0.4 protogon mg per g of peptone. If it is to be produced in a chemostat at a dilution rate of 0.5 h-1 from a medium containing 10 g.l-1 of peptone, then the rate of protogon synthesis would be
Correct Answer: time rate of total amount in rector = rate of addition to reactor -rate of removal + rate of formation
3. The cellular productivity in a continuous stirred tank fermenter (CSTF) increases with an increase in the dilution rate and reaches a maximum value. If the dilution rate is increased beyond the maximum point, the productivity will