China's traditional processed seafood products, such as scallop sea cucumber, shark's fin, seaweed, etc., are almost all processed by dry methods. Studies have shown that when using traditional natural air drying or artificial hot air drying to process the above-mentioned seafood, there are certain losses in water-soluble and heat-sensitive nutrient active substances. At the same time, the volume of the product is severely reduced, rehydration is difficult, and surface crusted turtles are also prone to occur. Cracking, fat oxidation, quality defects such as surface discoloration of the product, affecting the uniformity and storage stability of the product. If vacuum refrigeration technology is used instead of the traditional method to process sea treasures, it will effectively overcome the above-mentioned deficiencies, not only to ensure the uniformity of the finished product quality, but also to improve its appearance and internal quality and improve economic efficiency.
Vacuum freeze-drying technology can significantly improve the quality and grade of products, but in the aquatic product processing industry, the promotion is slow. The reasons for this are that policy makers and investors have four main concerns: First, equipment has a single investment, domestic ZDG-60 needs 1.5 million yuan, ZDG-100 needs 2 million yuan, and imported equipment costs are higher. Second, the vacuum freeze drying equipment has high processing costs. Third, the supply of raw materials for aquatic products (especially sea treasures) is unstable, and the annual production cannot be carried out continuously, and the off-season is long. The fourth is to worry about the market sales of products.
The first is the issue of equipment investment. Large-scale production of freeze-dried food cannot be achieved by the freezing equipment of the freeze dryer itself. The food must be pre-frozen with a separate freezing device or warehouse, and then directly transferred to a vacuum dryer for dehydration. China's aquatic product processing industry has been sluggish in recent years. Some enterprises are in a state of suspension of production and semi-discontinuation. Most of these enterprises have their own refrigeration equipment or cold storage. Investors can fully use these ready-made plants and equipment, and only need to add vacuum drying corresponding to the production capacity. Equipment, you can produce vacuum freeze-dried food, which greatly reduces the investment in disposable equipment.
In terms of processing costs, according to the information provided by the US Department of Agriculture, the processing fee for vacuum freeze-dried foods is more than twice that of frozen foods and canned foods, but its sales and storage costs are low. From the total cost of the entire processing and distribution process, the vacuum freeze-dried food is 1.02 times that of canned food and 1.28 times that of frozen food, and the difference between the three is small. If the freeze-dried is more expensive raw materials such as marine health products such as marine treasures, then the proportion of raw materials to total cost will be large. At this time, the advantages of high-quality high-grade and high-priced freeze-dried foods will be revealed.
The production of raw materials for aquatic products is unstable, and the variety of varieties varies greatly every year, and the seasonality is strong. This is a major feature of aquatic product production. At present, the international market has high demand for high-grade and high-quality vacuum freeze-dried foods in terms of quantity and variety. Therefore, it is necessary to break the traditional single production and operation mode and engage in the production of serialized diversified products. Freeze-dried food plants can choose other types of foods to produce according to different geographical conditions according to their geographical conditions, so as to ensure the continuity of production. This is convenient for organizing production, improving equipment utilization and economic benefits, enriching the variety of enterprise products, and enhancing the ability of enterprises to resist market risks.
As for the market sales of products, from the perspective of foreign markets, the demand for freeze-dried foods has increased year by year. As long as the quality of products is excellent, the export market is extremely promising. With the continuous improvement of people's living standards, the demand for dietary standards is getting higher and higher, and the demand for high-quality high-grade freeze-dried foods is great. As long as the producers and operators do a good job in propaganda and guidance, they will definitely get a good market. Return.