Freeze Drying
Freeze-drying is used to preserve products containing water or solvents. Good preservation of fragrancies, flavourings and ingredients with nutritional value is crucial in the foodstuff industry. With proper packaging and storage, freeze-dried products can be stored for a very long time without any appreciable loss of quality even at room temperature. Weight reduction will be up to 92%. Owing lo their extremely large internal surface area, freeze-dried products have an optimal capacity to take up water again.
ALD industrial freeze-drying systems offer the best capabilities with respect to performance, versatility and product quality and lower heating temperatures by contact heating, hence a lower final temperature of the product and better flavour retention. Further-more they have more sublimation power per m2 of area.
The main application for freeze-drying results from the remarkable advantages of the final product with respect to the conservation of volatile aromatics, heat-sensitive ingredients, colour, taste, original shape, texture and nutritional value, as well as quick rehydration before use.
Applications of Freeze Drying:
- Instant coffee and tea
- Drying of meat and meat products, poultry, fish, and shellfish, fruits and vegetables
- Dairy products such as starter cultures for yoghurt and cheese production
- Free drying of colouring pigments
- Production of starting materials having little agglomeration for use in the manufacture of complex sintered ceramic materials
