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What is the function of a sedimentation tank?

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in Fermentation Technology by (72.1k points)
What is the function of a sedimentation tank?

(a) Removal of larger suspended matter

(b) Reduction in particle size

(c) Removal of grit

(d) Removal of finer matter

The question was posed to me in a national level competition.

The above asked question is from Effluent in portion Recovery and Purification of Fermentation Products, Effluent Treatment, Bioreactor Design Considerations of Fermentation Technology

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Correct choice is (d) Removal of finer matter

The explanation: The sedimentation tanks are used for the removal of finer matter. They are generally circular or rectangular flow tanks. They operate at retention times of 6-15 hours with the facility of continuous removal of settled sludge.

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