Fermentation Reactors MCQs

Low dissolved oxygen concentrations leads to

In a continuous reactor, the medium contains 40 g.l-1 of maltose and the medium flow rate is 10 litres per hour and the effluent contains 20 g.l-l of lactate. What is the productivity of lactate production from this reactor?

A fed-batch reactor containing 1 g.l-1 of substrate in 2 litre of medium. It is fed with 1 g.l-l of substrate at the rate of 1 litre per hour. After 10 hours, the concentration of substrate in the reactor was 0.5 g.l-1 . The mass of substrate that was used by the culture in the reactor was

Toxins accumulated in a reactor can lead to low biomass yields probably due to which of the following?

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

Fluidized bed bioreactors provide higher mass transfer rates than packed bed bioreactors because

In fed-batch fermentation, mass of substrate utilized is calculated using the relationship

A chemostat has a liquid volume of 2 litres and is being fed at a rate of 4 litres per hour. Dilution rate for this reactor will be

Mixing per unit volume is observed to be poorest in