Virtual Labs

Chemical Engineering Chemical Process Dynamics Experiments

Aim

Theory

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Procedure

Simulation

Posttest

References

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Feedbatch Fermentor

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Production of lactic acid by fermentation is a classic example of:

a: Non-growth associated products Explanation

Explanation

b: Growth associated products Explanation

Explanation

c: Mixed growth associated products Explanation

Explanation

d: None of the above Explanation

Explanation

Non-growth associated products like penicillin are produced:

a: When specific rate of product formation is proportional to the specific rate of growth Explanation

Explanation

b: During deceleration phase Explanation

Explanation

c: Just after the death phase when intracellular proteins are released into medium by the dead cells Explanation

Explanation

d: During stationary phase Explanation

Explanation

Which of the following time profile is fundamentally incorrect and shouldn’t be observed during the course of experiment:

a: Volume of fed-batch increases continuously Explanation

Explanation

b: Product concentration increases with decreasing slope Explanation

Explanation

c: Specific growth rate increases continuously Explanation

Explanation

d: Substrate concentration decreases with time Explanation

Explanation

During the formation of growth associated products, the rate of substrate consumption depends upon:

a: Cell maintenance only Explanation

Explanation

b: Cell maintenance + product formation Explanation

Explanation

c: Product formation + biomass production Explanation

Explanation

d: Sum of cell maintenance, product formation and biomass production Explanation

Explanation

In a single fed-batch operation:

a: After fermentation has reached a stage, some culture is removed from vessel and replaced by fresh medium Explanation

Explanation

b: Volume decreases and specific growth rate increases Explanation

Explanation

c: The growth medium is added during the process and no culture is removed till the end Explanation

Explanation

d: None of these Explanation

Explanation

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