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Food preservation technology with nitrogen gas and food CO2 gas

Food preservation technology with nitrogen gas and food CO2 gas

Cập nhật: 06-08-2021 09:49:10 | News | Lượt xem: 16

The technology of preserving food by nitrogen gas and by CO2 gas is very popular. Normally, nitrogen gas to preserve food and CO2 used in food appears in food, medicine, drink, etc., which will increase the shelf life of the product.

So why are these 2 food preservation gases effective? The use of food CO2 and food nitrogen gas will change the gas composition inside the product packaging. Will there be any adverse effects on product quality and user health?

                                    

How does preservative gas work and what does it do?
Food preservative gases are selected gases used to change the proportions of the gas composition contained in a certain product package. This change is simply understood as reducing the amount of oxygen to 0% from 20.9%.

The purpose of this is to slow the growth of aerobic microorganisms. At the same time, it also has the effect of limiting the prevention of oxidation reactions.

Oxygen gas can be replaced by food nitrogen and food CO2. These alternative food preservation CO2 and nitrogen gases can lower pH or inhibit bacterial growth. Preserves the bright red color of meat, helping food look fresher and tastier.

Changing the composition of the gases contained in the container can be done by using an air pump. And either by vacuum or by designing “breathing” packaging. Breathable packaging is a type of packaging that changes the air balance called EMAP.

Since when has gas preservation technology been used?
This food preservation technology was first used in the 1930s. When trains transporting fruit used CO2 gas to pump into storage areas. This increases the shelf life and preserves the freshness of the product.

Since the 1970s, packages preserved by changing the gas composition of the packaging have become more popular.

Typical products that use gas to preserve food such as . Bacon and fish in retail stores in Mexico. Since then, this gas food preservation technology has been continuously developed to meet the needs of consumers.

Preservation technology uses nitrogen and CO2 for which products?
The three main food groups use food nitrogen and food carbon dioxide. Are fruits, fruits, vegetables, and meat products, seafood.
Many products using popular preservatives such as red meat and seafood make up the majority. Group of processed fruits and vegetables with a smaller proportion.
Foods such as pasta, cheese, poultry, cakes, cooked meats.
Prepared meals and packaged dry foods.
It is estimated that up to 25-40% of the total fresh fruit and vegetable production will spoil after harvest. And decomposed during distribution to consumers if not well preserved.

What is preservative gas packaging?
Gas packaging for food preservation is a technique used to extend shelf life. Of fresh or processed foods.

In this gas preservation technique. The air around the food inside the packaging will be changed. The mix of gases in the package will depend on the type of product, what the packaging material is and the storage temperature conditions.

Currently, improved balanced gas packaging (EMAP) is the most popular food preservation technology. Normally the ratio of gases in the air is O2: 21%, CO2: 0.038%, N2: 78%.

But in EMAP packages, people actively lower the O2 rate at a low level and increase the high CO2 level. This type of packaging will extend the shelf life of the product.

How is nitrogen used in food?
In the food industry, nitrogen gas preserves food by slowing its decomposition. This ensures freshness and high crispness in foods.

Dry food storage:

Nitrogen gas will be pumped in for use to preserve naturalness. And the product life, keep the brittleness and dry properties.

One prominent application of nitrogen gas in food is that it helps preserve food inside the packaging.

By straining the packaging (such as cans, bottles, bags) containing beverages (non-gas). Helps to keep the cover from being deformed and damaged during transportation.
At the same time, the nitrogen gas keeps the taste of the drink delicious for longer.
Nitrogen gas used in frozen food:
Nitrogen gas preserves frozen foods efficiently and economically. Helps maintain the freshness of foods, most of which are fruits, vegetables, seafood...

Because nitrogen gas forms a barrier that helps limit the exposure of food to oxygen. Slows down rancidity and limits other losses caused by oxidation.

In addition, liquid nitrogen in food is also used to make smoky ice cream, which is very popular with young people.                          

Application of CO2 gas used in food
CO2 is used in food when packaging products and in the brewing process

♦ The use of food CO2 helps prevent degradation. Food product spoilage from moisture and oxygen elements. Helps control the emission of volatile gases and protects against explosions in warehouses and storage areas.

♦ Food CO2 will freeze, cool food quickly. Compared with refrigeration mechanical cooling systems such as common freezers or refrigerators. Increase production efficiency, reduce loss of dehydrated food. Reduces the activity of harmful bacteria, molds, bacteria...

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