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In which of the following fermenters the impellers are replaced by the constant flow of gas?

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in Fermentation Technology by (72.1k points)
In which of the following fermenters the impellers are replaced by the constant flow of gas?

(a) Airlift fermenter

(b) Tower fermenter

(c) Hollow fibre

(d) Perfusion bioreactor

I had been asked this question in an interview for job.

My query is from Types of Bioreactors in division Recovery and Purification of Fermentation Products, Effluent Treatment, Bioreactor Design Considerations of Fermentation Technology

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Best answer
The correct answer is (a) Airlift fermenter

For explanation: In airlift fermenters, the impellers, motors, the driveshaft is replaced by a constant flow of gas introduced into a riser tube. It may also be provided with baffles for improving the mixing efficiency.

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