![](https://kynghexanh.com/wp-content/uploads/2022/03/en-knx.png")
Freeze-dried strawberries , also known as freeze-dried strawberries, is a drying method with many internal advantages compared to other drying methods. In this article, let’s learn more about the sublimation drying method for fresh strawberries.
MỤC LỤC
Nutritional value and uses of freeze-dried strawberries
Nutritional value
The nutritional composition of strawberries mainly includes water more than 90%, carbohydrates 7.7%, very little fat 0.3%, protein 0.7%.
On average, In 100g of strawberries contains substances such as:
- Water 91%
- Protein: 0.7gr
- Carbs: 7.7 gr
- Sugar: 4.9 gr
- Fiber: 2g
- Fat: 0.3g
In addition, strawberries also contain a lot of vitamins and minerals such as vitamins C, E, B6, manganese, folate, potassium, … a large amount of antioxidants, have many nutritional values good for the health of the user.
Uses of strawberries
The benefits of strawberries include:
- Strengthen the immune system, improve the body’s resistance
- Preventing cataracts, avoiding blindness in the elderly
- Anti-cancer, has the effect of destroying free radicals
- Prevention of diabetes
- Supports the treatment of apple, stimulates the digestive system to stabilize
- Control and regulate blood pressure
- Anti-aging, beautifying skin, supporting weight loss
Freeze-dried strawberries or freeze-dried strawberries are better quality?
Strawberries are one of the fruits that when ripe, are soft, have a watery texture, are easy to change substances and are difficult to preserve in external environmental conditions.
Dried strawberries come in two forms:
- Soft dried strawberries – Freeze dried strawberries
- Crispy dried strawberries (powder form) – Sublimation dried strawberries .
Each drying method is different, strawberries will have different preservation times as well as different shapes and structures.
Currently, in order to prolong the shelf life of strawberries, people often apply sublimation drying technology to produce sublimation dried strawberries because strawberries have a watery texture, easy to soften, so if they are dried normally – freeze-dried. will make the piece of strawberry or strawberry flatten, change shape, bad color.
What is the principle of sublimation drying?
The principle of sublimation drying is to apply the sublimation phenomenon of ice to dry the product. For fruits with a lot of water, a lot of sugar or products that are difficult to preserve outside, freeze drying can be applied.
The freezing temperature in the drying chamber must reach -30 degrees Celsius to ensure the requirements for sublimation drying, and the pressure must be as low as 15-50pa.
- See details: What is sublimation drying?
Production process of freeze-dried strawberries
Freeze-dried strawberries are produced by a rather complicated and sophisticated drying process, but they ensure the original shape, structure and properties.
The appropriate temperature for sublimation drying of strawberries will be different at each stage, there can be up to 8-10 stages of temperature change, the lowest is -20 degrees Celsius, the highest is 30 degrees Celsius.
- Stage 1: The process of freezing strawberries, the temperature will be adjusted at -30 degrees Celsius for 6-8 hours.
- Stage 2: Vacuum process to the required vacuum pressure (20-40pa) for sublimation to occur.
- Stage 3: Drying the strawberries, by gradually increasing the heat, helps the ice component in the strawberries to sublimate.
Freeze-dried strawberries will keep their original shape, beautiful color, rich flavor, when eaten, they will be slightly powdery but not as tough as freeze-dried strawberries.
All will be met in the sublimation dryer – specialized drying equipment suitable for:
– Business establishments, producing and exporting fruits
– Food and agricultural food processing establishments and enterprises
With the characteristics of being soft and brittle, the internal components contain a high percentage of water, so strawberries must be dried in the most appropriate temperature conditions to ensure the following form, design and quality. when drying.
SUNSAY sublimation dryer is thoroughly researched and equipped with advanced sublimation drying technology from Europe. Closed drying chamber design, ensuring food hygiene and safety standards.
SUNSAY sublimation dryer is set up with 3 stages of sublimation drying process:
– Stage 1: Freeze ripe strawberries at -45 to -30 degrees Celsius
– Stage 2: Sublimation drying at -45 degrees Celsius, pressure 0.008 mmHg
– Stage 3: Vacuum drying at a temperature of 0 degrees C to 25 degrees C, a pressure of 0.008 mmHg, the purpose is to remove the residual water inside the strawberries until the moisture remains only 1-5%.
Freeze-dried strawberries after undergoing drying by SUNSAY sublimation dryer will meet the requirements of:
– Color: bright red
– Shape: intact, not crushed, soft
– Taste: characteristic aroma similar to when fresh ripe
– Nutritional value: no change, or very little change
– Shelf life: from 6 to 12 months
Some popular sublimation dryer lines of SUNSAY
- Sublimation dryer 5kg
- Sublimation dryer 10 kg
- Industrial Sublimation Dryer
Contact method to order dryer SUNSAY
In addition to sublimation dryers, SUNSAY Vietnam also provides other types of dryers such as: refrigeration dryers, heat dryers, rice dryers, and horizontal dryers,…
Please contact Hotline (Zalo): +84 935.995.035 or call center +84 941.108.888 or leave information in the form and we will contact you right away.
