SPRAY DRYING
During the spray-drying process, the raw materials are mixed or emulsified with water and carriers/emulsifiers (e.g. maltodextrin, gum acacia, modified starch) and fed into the nozzle where it is sprayed under high pressure into the main chamber along with hot air, which instantly evaporates the water.
This leaves just the solids behind. The resulting powder is collected in a cyclone before being sieved and packed.
Characteristics of Spray-Dried Powders:
A spray-dried product has better handling and storage characteristics compared with liquids. This means ambient storage with a longer shelf life as a result of the low moisture content. It’s also a convenient format for handling/dosing ingredients like honey, syrups and molasses.
- Spray-drying is a simple form of encapsulation – sensitive extracts and oils are more stable in powders and less likely to oxidise or degrade when stored.
- Spray-dried powders are water-soluble and easily dissolve in water-based food products.
- Spray-dried powders can be easily blended with other dry ingredients.
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