Question

explain separation techniques that are used to separate the following a) cream of milk

Answer 1

a) centrifugation
this process is used to separate cream of milk.
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Answer 2

Centrifugal Separation: In principle, this method of cream separation is similar to gravity separation but gravity as the driving force is replaced by the centrifugal force for which a rotational machine is used. Since the latter force is much larger than the gravitational force, separation is greatly accelerated. The centrifugal separator is similar to the clarifier discussed in the earlier section, but milk entering through the bottom of the separator bowl holding a stack of conical discs rises up through holes located somewhere in the middle of the inner and outer edges of the discs.The milk between discs is subjected to a centrifugal force in the rotating bowl and thereby tends to fly out from the centre. The skim milk fraction, being heavier,moves away and forms a layer on the outer edge of the discs, whereas the fat globules gather on the inside edge. The incoming un-separated milk forces the separating layers further and upward out at the top of the bowl. Thus, there are two outlets in a cream separator, one for skim milk and the other for cream, the cream outlet being nearer to the centre. Then both the substance are been separated ...

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