GOOD PROJECT EXAMPLE: Freeze-drying Technology Based on the Specific Character of Fruits and Vegetables |
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Allikas: Notice Innovative Agriculture 2.0 17. veebruar 2022. a |
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The problem to be solved The objectives of the innovation activity are to:
Project outcomes It was established that the most suitable packaging material for the freeze-dried products would be a structure made from polymer film with a layer of aluminium and polyethene composite (PET/Alu/PE) or an airtight thin-wall metal can. Packaging of the products in the described packages would ensure the longest shelf-life for the freeze-dried products and consequently, grant the highest environmental sustainability in terms of shelf-life. Additionally, a package The most energy-efficient freeze-drying technology and the core issues for increasing the efficiency of the process were identified: the most energy-efficient freeze-drying technology is the use of the freeze-drying chamber of maximum vacuum density where the water vapour condenses onto the surface of the condenser in solid ice form at a temperature of -70°C or lower. A system of several chambers is used for the condensation of the vapour where the heat from the process is accumulated and reused.
“The defined objectives were met by the acquired knowledge about the possibilities of increasing the speed and efficiency of freeze-drying. Additionally, the project provided a basis for future research to identify the best berry varieties in terms of suitability of different berry crops for freeze-drying and find solutions for reducing the skin barriers.” Raimond Strastin, a board member of NGO Aiandusklaster
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