Introduction to CA

For long term storage of fruits, vegetables and other respirating commodities, the natural ripening process has to be slowed down, without affecting the quality and the flavour. CA storage is the technique used to achieve this.

CA storage, what does it mean?
Controlled regulation of atmospheric composition is called Controlled Atmosphere, or simply CA. CA stands for the control of temperature, humidity and atmosphere. Manipulating these variables makes it possible to create the most optimal condition necessary to extend the life of any respirating product. Every commodity has its own optimal condition. Depending on the climate, recent weather conditions, soil compound, the so called growing conditions, time of harvest, etc, these conditions vary per year by commodity and even by variety. Because of years of experience in this field, we work with together with Besseling Agri Technic (BAT) and can advise you in this.

Working principle
By applying CA, the physiological processes in respirating products are slowed down, which extends the life time. The optimal atmospheric storage conditions are reached by increasing the level of carbon dioxide, decreasing the level of oxygen at an optimal temperature. These conditions slow down the respiration of the product so ripening and aging is delayed.

Temperature
The surrounding temperature of the products is reduced to the lowest level possible, without damaging the product.

Oxygen and nitrogen
Under the influence of oxygen the nutrients of the product are broken down. The fruit 'burns' the nutrients, by which warmth is produced. By reducing the level of oxygen, the respiration is slowed down and the 'burning' of important nutrients is reduced. The aim is to lower the oxygen level to the lowest level possible: so called Ultra Low Oxygen (ULO) storage. In order to lower the oxygen level as fast as possible (pull down), pure nitrogen is inserted into the cold stores. It is of utmost importance that the oxygen level does not become to low, so that the product will 'suffocate'.

Carbon Dioxide
The process of respiration uses oxygen and produces carbon dioxide. Too much carbon dioxide will damage the product. The level of carbon dioxide can be controlled by a carbon dioxide scrubber.

Ethylene
Ethylene gas is produced by respirating products and is a ripening agent. It also stimulates the aging process. Controlling the ethylene level, means a longer life time. Furthermore it enables you to ripen your product the moment you want. Removing the ethylene can be done by an ethylene converter.

Relative Humidity
Controlling the relative humidity (RH) can be of great importance for several products. Dehydration causes a loss of quality and weight. Controlling the RH prevents dehydration, just as mould and rot because of a RH too high.

Advantages
The big advantage of CA technology is the possibility of long time storage and to sell your product when the time is right, without a loss of quality.
Thanks to BAT's technology the shelf life of your product is extended without reduced firmness or loss of ground colour. You can ripen your product whenever you want.
CA storage is an alternative for chemical preservation and reduces the use of pesticides. Furthermore the post harvest losses are reduced enormously.

In other words, our equipment makes sure your products maintain their nutrients and thus their market value.

Please talk to us about any CA requirements you have.