The preservation principle, advantages and storage effect of controlled atmosphere fresh-keeping warehouse

A controlled atmosphere fresh-keeping warehouse is a device used to store perishable foods such as meat, fruits and vegetables. Because it can maintain low temperatures and reduce the oxygen content in the air, the storage effect is very good, so it has become a preservation equipment with a particularly wide range of applications. At the same time, the controlled atmosphere fresh-keeping warehouse also has the advantages of long shelf life, simple operation and convenient maintenance. Next, I will introduce the preservation principle, advantages and storage effect of the controlled atmosphere fresh-keeping warehouse.

principle

Controlled atmosphere preservation refers to a technology that achieves the purpose of preserving stored products such as meat, fruits and vegetables by artificially changing the composition of the ambient gas on the basis of low-temperature storage. Specifically, atmosphere control actually involves reducing the oxygen content in the ambient gas while maintaining a suitable low temperature and appropriately changing the composition ratio of carbon dioxide and nitrogen.

Fruits and vegetables are still alive after being harvested, and the energy needed for their life activities is obtained by decomposing nutrients accumulated during the growth period through respiration. Therefore, the essence of fruit and vegetable preservation is to reduce the respiration of fruits and vegetables to reduce the consumption of nutrients.

Advantages

(1) Wide range of applications: Suitable for the storage and preservation of various fruits, vegetables, flowers, seedlings, etc. in both northern and southern my country.

(2) Long storage period and high economic benefits. For example, grapes can be kept fresh for 7 months, apples for 6 months, and garlic shoots for 7 months, and their quality remains as fresh as before, with a total loss of less than 5%. The general price of grapes at the production site is only 1.5 yuan per kilogram, but if stored until around the Spring Festival, the selling price can reach 6 yuan per kilogram. A cold storage can be built with a one-time investment, and its service life can reach 30 years, with significant economic benefits. Invest in the same year and see results in the same year.

(3) Simple operation technology and easy maintenance. The refrigeration equipment uses a microcomputer to control the temperature and automatically starts and stops, without the need for special personnel to monitor it. The supporting technology is economical and practical.

(4) There are many types of controlled atmosphere fresh-keeping warehouses, the most typical of which are fruit and vegetable fresh-keeping warehouses. They can not only adjust the temperature and humidity in the warehouse, but also control the content of gases such as oxygen and carbon dioxide in the warehouse, so that the fruits and vegetables in the warehouse are in a dormant state and still maintain their original quality after leaving the warehouse.

Storage effect

1. Inhibit respiration, reduce the consumption of organic matter, and maintain the excellent flavor and aroma of fruits and vegetables.

2. Inhibit water evaporation and maintain the freshness of fruits and vegetables.

3. Inhibit the growth and reproduction of pathogens, control the occurrence of certain physiological diseases, and reduce the fruit rot rate.

4. Inhibit the activity of certain ripening enzymes, inhibit the production of ethylene, delay the ripening and aging process, maintain the hardness of the fruit for a long time, and have a longer shelf life.