Allied & ICAR Exam Bank • ALLIED_1336 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Dairy Unit Operations

Subtopic: Membrane Filtration - Reverse Osmosis

Question Statement:

In dairy whey processing, which pressure-driven membrane separation process operates at highest pressure (30 to 60 bar) and retains all solutes including minerals, allowing only water molecules to pass?

Options:

  • (A) Reverse Osmosis (RO)
  • (B) Microfiltration (MF)
  • (C) Ultrafiltration (UF)
  • (D) Dialysis

Answer Key:

A

Step-by-Step Solution & Explanation

Reverse osmosis membranes have dense non-porous polymer matrices that reject all mineral ions and lactose, requiring pressures exceeding the solution osmotic pressure (
gt;30\text{ bar}$) to dewater whey.
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