Food freeze-drying is a processing technology that removes water from food, which can preserve food for a long time and maintain its nutrients, taste, and original form. In the process of food freeze-drying, it is crucial to choose a reasonable process and food freeze-dryer equipment. First of all, the lyophilization process involves several parameters, such as the temperature of the shelf, the temperature of the condenser, and the vacuum of the freeze-drying box. In addition, the lyophilization process curve is also affected by factors such as the degree of supercooling, crystallization, disintegration temperature or eutectic temperature, the heat of crystallization of the solution, and the eutectic point.
For the selection of food freeze dryer equipment, the first thing to consider is whether it meets GMP requirements to ensure that it meets production specifications and quality standards. Second, the performance of the equipment is evaluated, including its stability and reliability, the ability to accurately control the temperature of the material, and the quality and nutrient retention of the finished product. In addition, the energy regulation range and reproducibility of the device are also important considerations.
A common choice is a pre-cooled food freeze dryer, which is characterized by the loading of raw materials directly into the freeze-drying chamber of the freeze-dryer equipment, and the switch to the drying stage directly after the pre-freezing is over. This equipment requires plate refrigeration and temperature control, which can be precisely controlled according to the requirements, so as to keep the shape, color and nutritional content of the finished product basically unchanged. It is especially suitable for contact lyophilization of aqueous solutions and food materials with sugar.
Choosing the right food freeze dryer equipment also needs to consider its material, design, and function. For example, the material cart and material tray should be made of stainless steel that meets food safety standards, and the material rack should be stable in and out of operation, and the operation should be simple and easy. In addition, the equipment should adopt imported brand units, with one-button start, process setting, record storage, remote operation and monitoring, data traceability and other functions.
Choosing a reasonable process and equipment is an important factor to ensure the quality and efficiency of food freeze-drying processing. In order to ensure the smooth progress of the food freeze-drying process and obtain high-quality products, the appropriate freeze-drying process and food freeze-dryer equipment should be selected by comprehensively considering the freeze-drying process parameters, equipment performance and operation convenience required by the material.