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Which evaporators can be used when a low degree of concentration is required?(a) Falling filmevaporator(b) Circular type evaporator(c) Tubular type evaporator(d) Plate type evaporatorI have been asked this question during an online exam.The doubt is from Evaporator topic in chapter Building Blocks of Dairy Processing of Dairy Engineering

Answer»

Correct option is (b) Circular type evaporator

The best explanation: Circulation evaporators can be used when a low degree of CONCENTRATION is required or when small quantities of product are processed. In YOGURT production, for example, evaporation is utilized to concentrate milk 1.1 to 1.25 times, or from 13% to 14.5% or 16.25% solids content respectively. This treatment SIMULTANEOUSLY de-aerates the product and RIDS it of off-flavors.



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