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What type of dryer is used for the drying of substances which are hygroscopic?

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+1 vote
in Food Processing Unit Operations by (110k points)
What type of dryer is used for the drying of substances which are hygroscopic?

(a) Fluidized bed dryer

(b) Drum dryer

(c) Cabinet tray dryer

(d) Vacuum dryer

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

Enquiry is from Drying Equipments in chapter Drying of Food Processing Unit Operations

1 Answer

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Best answer
Correct option is (d) Vacuum dryer

The best explanation: Vacuum Tray dryer is the most commonly used batch dryer. Vacuum Tray Dryer is used for drying of hygroscopic substances and heat sensitive materials, which are dried to very low residual moisture content level.

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