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TLS Online TPP Program
#Question id: 20823
#Unit 12. Biochemical Engineering
In a plug flow bioreactor running at steady state, 12.5% cells are recycled back to the inlet. If the cells grow at μmax=1 h-1 throughout the length of the reactor (L=124 cm), then the flow velocity should be
TLS Online TPP Program
#Question id: 20824
#Unit 12. Biochemical Engineering
In a CSTR, first order reaction takes place converting A to B. If at a dilution rate (D)= 0.5 h-1, 50% of A gets converted to B, then the rate constant ‘k’ of the reaction is:
TLS Online TPP Program
#Question id: 20827
#Unit 12. Biochemical Engineering
A new spherical resin (of radius 300 urn) has been developed in which only the outer layer is activated to a depth of 100 um (as shown in figure). The fraction of the activated volume is:
TLS Online TPP Program
#Question id: 20828
#Unit 12. Biochemical Engineering
In a fed batch cultivation, a specific growth rate of 0.2/h needs to be maintained. At the start of fedbatch cultivation, 200 mL/h of media is fed to 1000 mL of working volume. Quasi steady state shall be obtained if:
TLS Online TPP Program
#Question id: 20836
#Unit 12. Biochemical Engineering
Two columns of 1 m and 2 m height and of equal diameter are packed with beads containing immobilized enzyme. Substrate was fed to these two columns at flow rates of 10 mL/min (1 m column) and 20 mL /min (2 m column) and the corresponding conversion efficiencies obtained were 30% and 40% respectively. This demonstrates that the reaction is:
TLS Online TPP Program
#Question id: 20562
#Unit 12. Biochemical Engineering
Scale up of a fermenter is done based on constant impeller tip speed. If the diameter of the impeller is increased by 10 fold, the agitator speed will: