【Background technique】
Fresh fruits and vegetables are not shelf-stable, perishable, and have limited fresh sales. In fruit and vegetable planting parks, 10% to 30% of fruits and vegetables (referring to fruits and vegetables that do not meet the standard due to size or appearance after maturity) are not used. Therefore, the deep processing of fruits and vegetables has become a necessary part of increasing added value and avoiding waste of resources.
Drying is a common and effective way to prolong the shelf life of fruits and vegetables. The effects of different drying methods on the color and nutrient composition of fruits and vegetables were quite different. Compared with traditional sun-drying and drying methods, freeze-drying method has the best effect. The obtained dried fruits and vegetables have loose structure, good color, crisp products and better nutritional quality, while the dried fruits and vegetables obtained by hot air drying have the worst quality.
【Fruit and vegetable freeze-drying process】
1. Pre-treatment of fruits and vegetables: Clean the fruits and vegetables, peel and core, then cut them into equal-sized blocks (or slices and strips, which can be processed according to product requirements), and then lay them flat in the freeze dryer. In the stainless steel tray, put the tray on the shelf of the material trolley.
2. Vacuum freeze-drying: push the material trolley into the drying chamber of the Kassel food freeze-drying machine for low-temperature freeze-drying. The freeze-drying time is 18-30 hours.
3. Freeze-drying post-processing: The freeze-dried fruit and vegetable products are strictly controlled under certain temperature and humidity conditions, and are packaged and stored in accordance with the requirements of conventional production licenses.
4. Quality control (inspection): ① Sensory indicators, sensory inspection of the finished product after freeze-drying. The inspection indicators include color, tissue morphology, taste and smell, and foreign impurities. ② Determination of moisture content and rehydration rate.
【Fruit and vegetable freeze-drying production line equipment catalog】
No. | Content |
1 | Fruit and vegetable ozone disinfection and scrubbing machine |
2 | Fruit and vegetable bubbling washing machine |
3 | Circulation Fruit Feeder |
4 | Peeler/De-corer |
5 | Fruit and vegetable harmless conveyor |
6 | Fruit and vegetable elevator |
7 | Fruit and vegetable conveyor belt |
8 | multi-person fruit and vegetable buffer table |
9 | Air Dry Drainer |
10 | Automatic Slicing/Slitting Machine |
11 | Kassel Food Freeze Dryer |
12 | Material transfer system |
13 | Fully automatic combination scale bag feeder system |
14 | Ten Head Scale Rotation |
15 | Packaging machine system |
16 | Food grade aseptic purification workshop |
Kassel (Zhejiang) Co., Ltd. provides users with general contracting services for freeze-drying equipment complete production lines to simplify your freeze-drying projects!
