A fed-batch reactor containing 2 litre of medium and 0.1 g.l-l of biomass is fed

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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
Options
A. 1.5 g
B. 2.2 g
C. 3.0 g
D. 6.0 g

Correct Answer

2.2 g

4. 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
Options
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

9. At 25°C, the saturation concentration of oxygen in water is 1.26 mmol/l and the partial pressure of oxygen is 1 atm. The Henry's law constant will be
Options
A. 0.793atml/mmol
B. 0.207atml/mmol
C. 1.26 atml/mmol
D. 8.74 atml/mmol

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