For fruit growers, food processors, and small-scale fruit product manufacturers, it is very common to purchase a single piece of equipment and use it to process a variety of fruits, such as blueberries, strawberries, bananas, and mangoes. So, can the small freeze dryer process different types of fruit?
The answer is yes. The key is not to switch between different machines, but to adjust the freeze-drying conditions based on the fruit's moisture content, shape, thickness, and load size, while selecting the appropriate equipment capacity and vacuum system.
What Fruits Can a Small Freeze Dryer Machine Process?
Fruits typically contain high levels of moisture, and vacuum freeze drying removes this moisture through three stages: freezing, sublimation drying, and desorption drying. The raw material is first frozen; then, under vacuum, the ice is directly sublimated into water vapor and captured by a cold trap. This process effectively preserves the fruit's original shape, color, and flavor.
Can Blueberries and Strawberries Be Processed Using the Same Machine?
Yes. Both blueberries and strawberries are common freeze dried fruit products; when using the same machine, there is no need to replace the entire unit just to switch between fruits.
However, the freeze drying parameters for different fruits are not necessarily identical. For example, the structure of whole blueberries, the thickness of strawberry slices, and the moisture content of the raw materials vary, so the actual freeze-drying time and program settings must be adjusted according to the specific product.
What Machine Parameters Should Be Considered When Processing Multiple Types of Fruit?
When selecting a small freeze dryer, you should ensure that the machine can meet your actual processing needs.
1. Batch Processing Capacity
This LONKIA small freeze dryer has a rated processing capacity of 10 kg per batch.
Users processing multiple types of fruit simultaneously should calculate the actual number of batches based on the daily volume of fresh fruit to be processed. For example, blueberries and strawberries can be processed in separate batches rather than simply mixing different fruits into a single batch.
2. Cold Trap Temperature and Vacuum Level
Cold trap temperature and ultimate vacuum level directly affect the moisture sublimation process. This freeze drying machine achieves a cold trap temperature of ≤-40°C to -50°C and an ultimate vacuum of ≤10 Pa, providing the low-temperature and vacuum conditions required for freeze-drying fruit.
3. Control System
When processing different fruits, the equipment's control system must allow for easy setup and adjustment of freeze-drying programs. This unit automatically completes the freezing, vacuum sublimation, and drying processes, reducing the need for manual intervention.
How Should Production Be Organized When Processing Multiple Types of Fruit?
If processing blueberries and strawberries simultaneously, it is recommended to establish separate freeze-drying parameter records for each product, including load capacity, raw material condition, slice thickness, and actual freeze-drying time. After several test batches, a stable processing program can be established.
The same approach can be used for testing other fruits. In this way, a single freeze drying machine can handle the processing of multiple fruit varieties and flexibly schedule production based on different products.
What Should You Confirm with the Supplier Before Purchasing?
If you plan to use a small freeze dryer to process multiple types of fruit, it is recommended that you provide the types of fruit, the weight of each batch of raw material, the estimated daily processing volume, and the desired form of the processed fruit when requesting a quote. The supplier can then determine whether the unit's capacity and configuration are suitable.
LONKIA can provide tailored equipment solutions based on the customer's raw materials and required production capacity, ensuring that the equipment selection closely aligns with actual processing needs.
Conclusion
A small freeze dryer can be used to process a variety of fruits, but what truly determines the processing results is not just the equipment's name, but its processing capacity, vacuum system, cold trap performance, control programs, and the process parameters specific to each fruit. For users processing multiple fruits simultaneously—such as blueberries and strawberries—selecting a freeze-drying machine with appropriately matched parameters and flexible operation can reduce the need for multiple equipment purchases and make it easier to schedule processing batches for different fruits.
