China is a big country for fruit and vegetable production, but it is not a strong country. According to incomplete statistics, due to the backwardness of fresh-keeping technology and deep processing technology after harvesting, the annual loss of fruit and vegetables in China is as high as 20-30% of the total output, that is, the annual fruit and vegetable rot More than 80 million tons, the economic loss is as high as 75 billion yuan. Therefore, it is particularly urgent to develop and promote post-harvest preservation technology and deep processing technology suitable for China's national conditions.
What is a composite atmosphere fresh-keeping packaging? The principle of composite modified atmosphere packaging is to replace and seal the air in the plastic bag or box filled with fruits and vegetables by using composite fresh-keeping gas (N2, O2, CO2, three kinds of gases mixed according to the characteristics of fruits and vegetables). The gas ratio in the plastic bag or the box forms a micro-adjustable environment inside the bag or inside the box - that is, a micro-tuning library is formed. Thereby achieving the metabolism of new towns that slow down fresh fruits and vegetables, and prolonging the shelf life and shelf life of fruits and vegetables.
The key technology of composite modified atmosphere packaging is the proportional control precision and gas replacement rate of composite gas. Due to the different performance characteristics of foods and vegetables, they are quite sensitive to the proportional characteristics of fresh-keeping gas. Therefore, the qualified composite air-conditioning packaging machine should be equipped with a high-precision gas automatic mixing system, the proportional error should be less than 2%, and the gas replacement rate should be greater than 99.5%, otherwise its fresh-keeping effect will be greatly affected, and even some products will be fresh-keeping. The effect is worse than ordinary sealed packaging. To judge whether the equipment is qualified or not, in addition to the stability and reliability of the equipment, the above two parameters should be used as the standard.
The characteristics of the practical application of composite modified atmosphere packaging
A. Small investment: On the basis of the ordinary constant temperature cold storage with 0-4 °C, it is only necessary to invest 5-6 million yuan to store fresh fruits and vegetables;
B. Low operating cost: Since only ordinary constant temperature cold storage is needed, its energy consumption is only one third of the air conditioning warehouse;
C. Wide adaptability: It can store unreasonable fruits and vegetables at the same time in the same cold storage, and overcome the singularity that the gas storage warehouse cannot store different varieties of fruits and vegetables at the same time;
D. Long shelf life: The fresh-keeping period is generally 2-10 months depending on the variety of fruits and vegetables, so that it can form anti-season sales, reach a balanced market and expand the market;
E. A complete air-conditioning chain can be formed: the air-conditioning fresh-keeping package combined with the cold-storage chain can be used for air-conditioning packaging after the harvest of fruits and vegetables, and the sales terminal is formed to form a gas-conditioning chain. The air-conditioning warehouse can only be used for storage and cannot be transported. And the atmosphere of the sales counter is fresh.
Greenfarm Import And Export Co., Ltd. , http://www.jn-foods.cn