Grains such as wheat, rice, oats, maize, barley, sorghum etc. are the food items that need to be stored in bulk not just for selling purpose in malls and supermarkets but also for the purpose of consumption.
This food item is stored in large quantities preferably in cool, dark and dry places to provide them with the best protection against the environmental changes like temperature, humidity, light etc.
Grains are also highly vulnerable to the presence of oxygen as it is capable of degrading huge amount of grains in minimal amount of time. It causes the oxidation in the stored packages that can further lead to the growth of microorganisms, mold and mildew. Consequently, it makes the food unfit for the consumption.
For grains to be stored in large quantities for longer durations, it is very important to ensure that they are properly packaged in low moisture conditions such that room temperature never exceeds 24oC and oxygen level is maintained reliably at 0.01%. These precautionary measures when taken prior to beginning your storage regime help the food to remain nutritious and edible for much longer than you can think of.
Oxygen absorbers in grain packaging help protect the dry foods such as grains from moisture, insects, microorganisms and most importantly oxygen. It helps in preserving the quality for longer term and enhances the shelf life of the packaged foods. They are usually kept on top of the food in sealed containers.
Oxygen removal packets contain an iron powder. Moisture in the packaged food causes oxidation of iron turning it to rust. Oxygen absorber packets made of a material that allows oxygen and moisture to enter but prevents the iron powder from leaking out.
Oxygen absorbers works more effectively than the vacuum packaging as vacuum packaging removes all the air (about 20% oxygen and 80% nitrogen)and oxygen absorbers remove only oxygen leaving the nitrogen behind which helps in maintaining the freshness of the stored food.
Since the presence of residual air volume is less in grains hence small capacity of oxygen absorbers is efficient to do the work and depending on the degree of humidity in the area, just one sachet of 2000cc would also be effective in absorbing the oxygen efficiently.
Before adding oxygen absorbers while packaging the grains in the vessels, it is first important to prepare the grains by placing them in the storage vessels and keeping the lid and sealing material ready for the use while you are placing the grains and immediately secure the lid after you have placed the oxygen absorbers to ensure that no more oxygen can enter the vessel any further.