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What is the method of using the heat of a hot liquid, such as pasteurized milk, to preheat cold incoming milk?

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What is the method of using the heat of a hot liquid, such as pasteurized milk, to preheat cold incoming milk?

(a) Heating

(b) Cooling

(c) Regeneration

(d) Standardization

I had been asked this question in a national level competition.

My question is based upon Heat Exchangers in chapter Building Blocks of Dairy Processing of Dairy Engineering

1 Answer

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Correct choice is (c) Regeneration

Easy explanation: Regeneration (Heating): The raw cold incoming milk is partially and indirectly heated by the hot outgoing milk (milk-to-milk regeneration). This adds to the economy.

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