Which granulation method uses an air suspension technique to coat and dry particles and granules?

• A. Dry Granulation
• B. Wet Granulation
• C. Fluid Bed Granulation
• D. NOTA

Answer: (C)

Fluid bed granulation uses an air suspension to coat and dry particles. In this method, the bed of powders is fluidized by a rising stream of air, which keeps the particles suspended and evenly exposed. A binder or coating solution is sprayed into the bed, so coating occurs while the liquid solvent evaporates due to the drying air. This simultaneous coating and drying produce uniform granules efficiently, with good control over size and distribution. Dry granulation has no liquid involved, and wet granulation relies on a mixer or granulator rather than an air-fluidized bed, so they don’t use this air-suspension coating-drying setup.