Mar 25

How Nitrogen Generators Can Help Fruit Storage (controlled Atmosphere Storage)

There is nothing better than fresh fruit in the summer months. But when the weather turns and local fresh fruits are no longer an option then controlled atmosphere containers are used by the industry. The fruit storage industry allows us all to have fresh crisp fruit all year long.

Controlled atmosphere storage (CA) involves an attentive process of controlling gases within the large storage rooms. These rooms must be airtight in order to keep fruit just as fresh as the day it was picked. Careful control of the temperature, oxygen, carbon dioxide and humidity are all crucial elements in fruit storage. Controlled atmosphere storage for fruit storage is a non-chemical process. Controlling the oxygen levels in the rooms is most successful by introducing the infusion of nitrogen gas. Nitrogen generators can help take oxygen levels from roughly 21 percent in the air we breathe to as low as 1 or 2 percent. So why not let nitrogen help your fruit storage?

For the fruit storage industry, there are two unit types best suited for the application required. Membrane generators or PSA generators (pressure swing adsorption). The unit you choose always depends on your specific needs. However if you are not entirely sure which generator is best suited for your fruit storage company, an experienced nitrogen generator supplier will be able to suggest a unit for you.

Membrane generators are best suited for on-site low flow applications where the purity is 99.5% or lower. These generators have a simple manual process control and are very quiet with low maintenance }}. Another added benefit of the membrane generator for the fruit storage industry is that there is a quality air pre-treatment filtration system. Fruit storage depends on a very controlled environment which allows the ripening process to slow, until the product is ready to be removed from the controlled atmosphere storage room. Membrane technology generators are an extremely low-cost and reliable source for infusing nitrogen into the rooms.

PSA generators produce nitrogen differently – by way of a carbon sieve – and are best suited for applications in which purity should be 99.5% or higher. Compressed air flows through the sieve where oxygen and any other trace gas is absorbed by the nitrogengenerator. All the contaminants that are absorbed by the generator are expelled after a pre-set time. An advantage of PSA units are that they have narrow pore opening within the towers. Because oxygen molecules are smaller than nitrogen molecules, the oxygen has a better chance of being absorbed into the sieve and separates them from the nitrogen molecules which are much larger and can’t pass through the sieve increasing nitrogen production.

Depending on what your application needs specifically, both membrane technology and pressure swing adsorption units|Both membrane and PSA nitrogen generators}}} are great options for the fruit storage industry allowing controlled atmosphere storage rooms to operate smoothly, efficiently and most importantly to produce the best quality product.


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