Freeze drying (lyophilisation) has been used industrially for decades to preserve foodstuffs and organic materials. However, traditional tray-type freeze dryers are slow and labor intensive. Hosokawa's Vrieco-Nauta® Active Freeze Dryer eliminates these drawbacks and is a big step forward in the field of freeze drying bulk solids as well as in powder technology in general.
Active freeze drying offers unique possibilities for freeze drying various types of materials in one processing step, always resulting in a fine loose powder which is directly available from the product collector. Material consistencies can range from solutions, dispersions to paste and even wet solids. The key benefits of this technology are efficiency, minimal handling and a consistent, high product quality.