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Analysis of Multi-Scenario Applications of Industrial Gases in Food Preservation

Release time:

2025-03-14

Industrial gases are widely used in the food industry, particularly in packaging, to prevent oxidative deterioration and preserve freshness. Below is an analysis of their applications across various food categories:

Frozen Foods
Liquid nitrogen cryogenic emergency freezing technology is employed to rapidly freeze aquatic products, enabling them to meet national Grade 1 freshness standards.
At an emergency freezing temperature of -32°C, long-term storage and transportation are achievable while maintaining product quality.

Dehydrated Foods
For naturally or artificially dried foods such as peanuts, tea leaves, milk powder, and potato chips, vacuum-sealed packaging filled with nitrogen controls oxygen levels to prevent discoloration, flavor loss, or spoilage.

Ready-to-Eat Products
Modified atmosphere packaging (MAP) with food-grade CO₂ (40%–60% concentration) inhibits oxidation and suppresses bacterial, microbial, or fungal growth, effectively preventing mold formation.

Fish, Meat, Fruits, and Vegetables

These perishables require both preservation and freshness retention. Microbial or bacterial growth is a key concern. Custom gas mixtures are used:

Fresh meat: 20%–35% CO₂ and 40%–70% O₂.

Seafood: 20% CO₂ and 60%–80% O₂.

Fruits/vegetables: 1.35%–3.65% CO₂ and 12.5%–17.5% O₂.

Eggs
CO₂ is commonly used due to its exceptional efficacy in extending shelf life.

Beer
Neutral nitrogen gas is preferred over acidic CO₂ to better preserve beer’s physicochemical properties.

Liquid nitrogen is 30% cheaper to produce than CO₂. Nitrogen bubbles are injected into beer to reduce dissolved oxygen levels and create a concentration gradient that drives oxygen diffusion.

Canned Beverages and Fruits

Liquid nitrogen is injected into cans to displace air, reduce can wall thickness, extend shelf life, and improve storage stability.

This structured use of industrial gases ensures food safety, quality, and longevity across diverse food categories.

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