Renovate Regular Warehouse Into CA Storage
Yantai Keda Zhixian provides reliable solutions to renovate regular warehouse into CA storage.Controlled atmosphere storage, also known as CA storage, is the most advanced method for preserving fruits and vegetables today. It is based on refrigeration and increases gas composition regulation.
By controlling the temperature, humidity, carbon dioxide, oxygen concentration and ethylene concentration in the storage environment, it inhibits the respiration of fruits and vegetables, delays their metabolic process, better maintains the freshness and preservation quality of them and extends their storage and preservation period (sales shelf life). Normally, CA storage can extend the storage period by 3-5 times than the regular refrigeration. The fruits and vegetables stored in a controlled air warehouse can be from "dormancy " to "awaken" state after being taken out from warehouse, which can extend the shelf life (sales shelf life) of fruits and vegetables by 21-28 days, which is 3-4 times of that for ordinary refrigerated warehouses.
Characteristics of fruits and vegetables stored under controlled atmosphere
● Effectively maintain the original shape, color and aroma of fruits and vegetables;
● The hardness of the fruits is higher than the ordinary refrigeration;
● Low fruit rotting rate and low natural loss (water loss rate);
● Extending shelf life. Due to the long-term exposure of fruits and vegetables to low oxygen and high carbon dioxide, there is still a long period of "delayed effect" or dormancy after the controlled air is released;
● Suitable for long-distance transportation and export. The quality of fruits and vegetables has been significantly improved, creating conditions for export and transportation;
● Many fruits and vegetables can achieve seasonal production, annual sales and annual supply, thus creating good social and economic benefits.
The CA warehouse body not only requires good insulation to reduce the impact of external heat on the temperature within the warehouse, but more importantly, it requires good air-tightness to reduce or eliminate the pressure of external air on the air composition within the warehouse, ensuring fast adjustment speed and small fluctuation amplitude of the air composition within the warehouse, thereby improving storage quality and reducing storage costs. The controlled air storage body is mainly composed of an airtight layer and an insulation layer. Controlled atmosphere fresh-keeping warehouses can be divided into three types based on their construction: prefabricated, brick-concreted and jacketed.
The enclosure structure of the prefabricated controlled atmosphere warehouse is assembled with colorfully coated polyurethane sandwich panels, which have the functions of thermal insulation, moisture resistance, and air tightness. This storage has fast construction speed and elegant appearance, but the cost is slightly higher and it is the most commonly used type of newly built controlled atmosphere warehouses both domestically and internationally. The CA warehouse adopts specialized controlled atmosphere doors, which should have good insulation and air tightness.
In addition, during the long-term storage process after the door of the air controlled warehouse was sealed , it is generally prohibited to open the door casually and to avoid the air exchange within and outside the warehouse and cause the fluctuations of the air in the warehouse. In order to check the fruits and vegetables storage situation in the air warehouse, we need to make a observation window in the controlled atmosphere storeroom. After the completion of the air controlled atmosphere storage, an air tightness test should be conducted. The air-tightness should reach 300Pa, and the half pressure reduction time should not less 20minutes.
Superiority
Controlled atmosphere fresh-keeping storage belongs to the high-temperature warehouse. The preserved fruits and vegetables will not freeze and retaining their original freshness and flavor and the nutrition will not be lost. It is environmentally friendly and pollution-free.
Under the same preservation quality and temperature conditions, the preservation time of controlled atmosphere preservation storage is 3-5 times of cold storage and some of fruits and vegetables can even reach dozens of times, which is incomparable to cold storage.
The operating temperature of the controlled atmosphere fresh-keeping storage is between 0~12 ℃, which is 18~37℃ higher than that of the ordinary low-temperature cold storage (operating temperature -25~18 ℃). Within the same preservation time, the power consumption of controlled atmosphere fresh-keeping storage is much lower than that of ordinary cold storage.
The controlled atmosphere fresh-keeping storage warehouse uses inert gas to isolate the air, It can effectively inhibit the respiration of food cells and then mature, which not only extends the preservation time, but also increases the shelf life after the food is out of the warehouse, making it possible to sell fresh food for a long time after the food is out of the warehouse.
The controlled atmosphere fresh-keeping storage adopts gas composition and concentration regulation control technology, which can not only effectively inhibit the generation and action of ripening components like C2H4 (ethylene), but also has the functions of reducing oxygen, regulating carbon, inhibiting bacteria, and eliminating side effect of pesticide toxic.
The controlled atmosphere fresh-keeping storage warehouse adopts humidification technology, which not only maintains the moisture content of the food itself without loss, but also keeps the color and texture of the food unchanging, thus reducing foodstuff storage losses and preserving the original quality of the foodstuff.
The controlled atmosphere storage warehouse adopts modern mechanical and electrical control technology, which combines advanced automatic control equipment, network transmission technology with traditional mechanical and electrical products, so that the system has the characteristics of reliability, economy, rationality, advanced and remote control performance, which will soon become the main technology of modern food preservation storage.
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