Food and beverage businesses often look for improved ways to package perishable goods. Proper packing techniques increase product shelf life, preserve freshness, ensure flavor, and prevent discoloration. One method to achieve these objectives is modified atmosphere packaging. Below, you can learn more about MAP and how nitrogen can improve its results.
Understanding MAP With Nitrogen
There are several methods for extending food and beverage shelf life, but some are more effective than others. Combining MAP processes with the use of food-grade nitrogen allows organizations to optimize preservation methods.
What Is MAP?
MAP is the practice of manipulating perishable packaging atmosphere to increase product longevity. It reduces the contained oxygen volume in packaging to prevent aerobic spoilage and microorganism formation.
This process also prevents water vapor formation and replaces oxygen with other gases in the packaging to deliver additional product benefits, such as maintaining quality and extending shelf life. Businesses use MAP to enhance product image, nutrition appeal, and texture. This process does not rely on chemicals, often making it more appealing to consumers.
The Role of Nitrogen in MAP
Nitrogen, compared to other atmospheric gases like carbon dioxide and oxygen, can create an ideal environment for food products. This gas has inert properties, meaning it poses no threat to food safety or quality. With these properties, nitrogen has revolutionized food preservation. Food and beverage businesses leverage nitrogen gas for processing, packaging, and storage.
Commercial food production businesses utilize food-grade nitrogen generators to improve product shelf life with packaging techniques. Proper packaging reduces oxidation processes and prevents contamination, boosting item longevity. Other benefits of nitrogen include:
- Flavor preservation:
Nitrogen reduces moisture loss and protects products from contamination to preserve flavor. - Reduced spoilage:
Utilizing food-grade nitrogen inhibits oxidation and prevents moisture loss to keep food components from degrading. - Texture uniformity:
By preventing oxidative damage, reducing moisture loss, and protecting products from physical collapse, nitrogen allows products to maintain uniform textures. - Limited microbial growth:
This gas slows microbial growth by reducing the oxygen these microorganisms need to survive.
Nitrogen Techniques for Food and Beverage
There are several ways to embrace food-grade nitrogen for perishable products. Consider these nitrogen displacement techniques:
- Nitrogen flushing:
Flushing refers to cleansing processes. Nitrogen flushing aims to remove contaminants to achieve desirable conditions. This technique focuses on product quality, system cleanliness, and process efficiency. - Nitrogen purging:
Purging creates a controlled environment by removing or displacing reactive gases like oxygen. This technique ensures product quality by preventing oxidation and contamination. - Nitrogen blanketing:
Nitrogen blanketing prevents oxygen from entering by maintaining nitrogen gas in a container or over a product’s surface. This technique is beneficial for storage and processing where protection from degradation is crucial.
Applications of MAP and Nitrogen in the Food and Beverage Industry
Implementing MAP and food-grade nitrogen is beneficial for various perishable products. Common applications include:
- Baked goods:
Nitrogen preserves textures and flavors by reducing oxidative reactions. - Processed dairy:
Nitrogen allows dairy products like cheese to maintain appetizing colors and consistency. - Fresh fish and meat:
Nitrogen ensures these products remain bright pink or red to create a visual cue of freshness for consumers. - Produce:
Nitrogen allows fruits and vegetables to maintain freshness. - Carbonated beverages:
Nitrogen allows these beverages to maintain carbonation and flavor. - Wine and beer:
Nitrogen blankets can create a protective layer over storage tanks to protect beverages like wine and beer from oxygen contact. - Coffee:
Reinforcing coffee bags with nitrogen helps preserve the freshness of the beans or grounds, protecting them during transportation and storage. - Snacks:
Snacks like potato chips, nuts, and pretzels often employ MAP and nitrogen to prevent oxidation and maintain shelf life.
Nitrogen Flushing for Optimal MAP Results
Nitrogen flushing is particularly useful for MAP processes as this technique prepares packaging. The initial oxygen removal process is crucial, and nitrogen flushing is one of the most effective ways to accomplish it, especially in large-scale operations.
