Zeolite reactors for the gentle vacuum drying or freeze-drying (lyophilisation) of products by using water adsorption
- Best aroma retention
- Flexibility of production
- Selective process
- Batch or continuous process
Bucher Zeodration systems are designed for drying a wide range of products such as herbal and plant extracts, fruits, vegetables, herbs, bacteria and for the food and cosmetic industry. Bucher Zeodration technology offers a drying solution for liquid or solid products down to a residual moisture content of less than 0.5%. This process is successfully used for temperature sensitive products and to achieve maximum product quality.
The Bucher Zeodration system uses Zeolite reactors to trap the water or solvent. Zeolite is crystallised clay with a pore diameter of 4 Angstroms (water molecules are 3 Angstroms). Its properties, combined with polarity factors, lead to a selective moisture trap that under operating pressure conditions, retains water only. Because of a very low partial pressure at the water adsorption, a maximum reduction of lost volatile molecules through the vacuum system is achieved, thus maintaining most of the flavours in the product. While using Bucher Zeodration with vacuum dryers, a similar product-quality can be achieved than with freeze-drying systems. Due to an integrated and cyclic regeneration of the Zeolite the full adsorption capacity is maintained. The application of zeolite reactors offers interesting features as it permits a drying operation in the pressure range of 0.5–30m bar.
Zeodration can be combined with a Bucher vacuum cabinet dryer for batch production or a Bucher vacuum belt dryer for continuous production.
Adsorption capacity: 1 to 1000 kg/h water
Batch drier sizes: 0.2–88m2 heating surface
Belt dryer sizes: 0.6–325m2
El. installed power: 15 to 80 kW
Heating energy for regeneration: up to 900 kW