The use of nitrogen is greatly popular in the food preservation industry due to its inert nature and that it remains neutral when in contact with food. This allows for a safe and effective way to preserve food for long periods without affecting its taste or quality.
One of the top concerns in the food industry is preventing the oxidation of food, which occurs when food comes into contact with air. This process not only affects the taste of food but also paves the way for food spoilage. The food industry has always prioritized the implementation of effective anti-corrosion measures to address this issue.
When it comes to beer production, the use of nitrogen plays an important role in enhancing the quality of the final product. By effectively reducing the dissolved oxygen content, nitrogen helps to slow down the deterioration of the beer, and also prolongs its storage period without affecting the aromatic substances that give the beer its unique taste. Similarly, nitrogen is widely used in food packaging as it is a highly stable gas that can effectively repel oxygen. By minimizing oxidation and respiration, it helps to keep the food fresh for longer periods of time. Furthermore, nitrogen also has a natural inhibitory effect on the growth of bacteria, which helps to preserve the quality of the food product.
Dry foods like coffee, peanuts, pine cones, and milk powder contain very little moisture, which means that they are not susceptible to bacterial growth. Hence, their shelf life primarily depends on oxidation. To prolong the shelf life of such dry foods, vacuum nitrogen filling is used to reduce the oxygen content to as low as 1%. This process effectively prevents the oxidation of the food. On the other hand, typical snacks and barbecue items fall under the category of slightly moist foods. For these items, the modified atmosphere packaging technique is deployed, where CO2 is used to suppress bacterial growth and prolong the food's shelf life.