Bioprocess Technology

What is bioreactor?

• A large receptacle or storage chamber, especially for liquid or gas.
• An apparatus used for biochemical reaction or process in industrial to produce biological product
• Vessels designed to contain chemical reaction
•  Essential item used in distillation of liquid mixtures so as to separate the mixture into its component parts, or fractions, based on the differences in volatilities.

What is the type of the bioreactor shown in the figure?

• Bubble driven bioreactor
• Fluidized bed bioreactor
• Stirred tank bioreactor
• Packed bed bioreactor

What are the bioreactor operational modes?

• Batch and continuous
• Batch and fed batch
• Batch, continuous and fed batch
• Batch, continuous, fed batch and chemostat

Which type of bioreactor mode is more efficient?

• Batch
• Continuous
• Fed-batch
• Semi-continuous

What type of bioreactor mode is more common?

• Batch
• Continuous 
• Fed-batch
• Semi-continuous

Which is/are the advantage(s) of fed-batch operation?

• Fed-batch reactor can maintain low limiting substrate concentration
• Genetic stability
• Low operational cost
• All of the above

Agitation system consist of ...

• Agitator
• Baffle
• Mechanical seal
• All of the above

What is the flow pattern of the impeller shown in the figure?

• Rotational flow
• Radial flow
• Axial flow
• Laminar flow

Increasing the aeration rate and stirrer speed will increase the foaming problem. The statement given is 

• True
• False

Process parameters such as temperature, DO concentration and foam level are measured within proximity while the bioreator is working. The description above is about

• Off-line control
• On-line control
• Foam level control
• Temperature control