A live fish that has just been salvaged has been stored on ice, and after 1 month of putting it back into the water, the fish are still leaping up and down after a brief recovery; ripe strawberries are still fresh and dripping after 2 to 3 months of ice storage. The National Agricultural Fresh-keeping Engineering Technology Research Center in this Municipality recently developed the “Live Ice Temperature Storage Technology” to keep fresh agricultural products fresh for 2 to 3 months and reach the international advanced level and obtain national invention patents.
The third generation of fresh-keeping technology: let the plants and animals sleep
The National Agricultural Products Preservation Engineering Technology Research Center is the only national-level engineering and technology center in the agricultural sector. With the support of this Municipality's Science and Technology Innovation Fund, the center launched a full-scale research on ice-temperature modulating and fresh-keeping, and after more than a year of experts’ technological research, it finally developed this new preservation technology, which is followed by refrigeration and modified atmosphere preservation. After the third generation of preservation technology.
“Water freezes below 0°C, and the plant tissue remains in a living state at around 0°C, but its metabolism is reduced, breathing is slowed down, and it is temporarily in a dormant state.” Zhang Ping, National Agricultural Product Preservation Engineering Technology Center According to the doctor, living ice temperature storage stores food at a temperature below zero degrees Celsius to the freezing point of the food and stores it in a non-freezing state. During storage, fresh produce is temporarily dormant.
Dr. Zhang Ping said that the biggest advantage of ice-temperature storage compared with ordinary cold-storage storage is that the date of storage of agricultural products is longer and the freshness is higher. This new technology also has the outstanding advantage of being suitable for the long-distance transportation of agricultural products. For example, selling live fish to foreign countries requires the transportation of large quantities of water and oxygen equipment, which is very costly. However, transportation using ice-temperature storage containers does not require water and oxygen equipment. It only allows the fish to “sleep” and then gradually raises the temperature to other places to “wake up procedures”. The fish can then hop around and greatly reduce storage and transportation costs.
Preservation period extended by more than 2 times, better effect
According to experts, the cost of ice-temperature storage is slightly higher than that of ordinary cold storage, but it is lower than that of ordinary air-conditioned storage, and its storage effect is much better than that of ordinary air-conditioned storage. Compared with traditional preservation technology, ice temperature preservation can extend the shelf life of agricultural products by more than 2 times, and it can minimize harmful microbial activities and maintain the nutrition of agricultural products. The introduction of the ice-temperature air-conditioning library will enable the general public to eat more counter-season fresh produce, and will greatly increase the added value of agricultural products. For example, cherries cost 10 yuan per kilogram in the harvest season, and the shelf life can be extended by 2 to 3 months through ice temperature storage. The market price of 1 kilogram is as high as 50 yuan.
At present, the ice-temperature air-conditioning warehouse has been used in demonstrations in some of the farmers' markets in this city. This year it will be promoted and used by large-scale leading enterprises in the circulation industry throughout the country. It plans to build 300 ice-cooled air-conditioning warehouses throughout the year with a storage capacity of more than 10,000 tons. .
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