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Which of the following is not a type of centrifugation?(a) Hydro cyclone(b) Tubular centrifuge(c) Microfiltration(d) Disk stack separatorThis question was addressed to me in an online interview.Query is from Centrifugation in section Unit Operations of Bioprocess Engineering

Answer»

Correct choice is (c) Microfiltration

Explanation: Microfiltration is a membrane filtration process which removes contaminants from a fluid by microporous membrane. The membrane pore size ranges from 0.1 to 10 micrometers. Microfiltration is DIFFERENT from reverse OSMOSIS and nanofiltration because it does not require pressure and does not remove dissolved contaminants. However, centrifugation is OFTEN effective when the particles are very small and DIFFICULT to filter.



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