Blueberries freeze dried machine
Products Video
How freeze drying blueberries?
1. Benifits of freeze dried blueberries
The freeze dried blueberry produced by KFD-100 blueberries freeze dried machine is full in shape, just like the fresh fruit, with the unique flavor of blueberry, crisp in the mouth, is very loose and porous, and easy to be chewed.
2. The process of freeze drying blueberries follows the following procedure
A.Raw material → Selection → Cleaning → Draining →Damage the bluberry skin- Pre-freezing→ Sublimation drying stage →Desorption drying stage → Pakaging
As the process shows,the vacuum freeze-drying process includes three stages(pre-freezing, sublimation drying and desorption drying. The eutectic point of blueberry is about -33℃, and the eutectic point is about -30℃.
The experimental results showed that the optimal process of blueberry vacuum freeze-drying was to pre-freezing at -55℃ for 7.5h, set the shelves' temperature at 50℃, and then vacuum freeze-drying for 32h. The moisture content of freeze-dried blueberry was 5.27 %, and the rehydration ratio was 2.53.
3. Advantages of freeze drying technology
Vacuum freeze drying has the highest retention rate of nutrients such as vitamin C, anthocyanins, phenols and superoxide dismutase.
Products Specification
Specifications of KFD series
| Model | kFD-1 | kFD-2 | KFD-5 | KFD-10 | kFD-20 | KFD-30 | kFD-50 | kFD-100 | kFD-150 | kFD-200 |
| type | Conductive type | Radiant type | ||||||||
| Max ice capture(Kg/Batch) | 15KG | 30KG | 75KG | 150KG | 300KG | 450KG | 750KG | 1125KG | 1500KG | 2000KG |
| condenser temperature (℃) | -70℃ | -50℃ | ||||||||
| Shelf temperature( ℃) | -30~-60℃ | <100 ℃ | ||||||||
| Pre-freezing | In original place | IQF-Individual quick freezing Chamber | ||||||||
| Shelf Area | 1㎡ | 2㎡ | 5㎡ | 10㎡ | 20㎡ | 30㎡ | 50㎡ | 100㎡ | 150㎡ | 200㎡ |
| Heating &cooling medium | Silicon oil | Water | ||||||||
| Refrigerant | R404 A Or R507A | |||||||||
| cooling method | Air cooled, water cooled | Air cooled,water cooled,Evaporative cooling | ||||||||
| Final Vacuum(Pa) | 5Pa | |||||||||
| Defrosting Method | Hot water/stream | |||||||||
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FAQ
1.Are freeze dried blueberries healthy?
Yes, freeze-dried blueberries usually retain most of the nutrients found in blueberries, including vitamins, minerals and antioxidants. As a result, they are comparable to fresh blueberries from a nutritional standpoint. In addition, freeze-drying techniques retain as much of the texture and flavor of fresh blueberries as possible. This allows them to remain relatively similar in taste.
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