Is it safe to preserve food by vacuum?

This is an automatically translated article.

Vacuum preservation of food is a method of food packaging that removes air from the food package before smoking. This method includes both manual or automatic, we do it by placing the food to be preserved in a bag used for vacuuming, then removing the air from the inside and vacuuming the bag. into the. So is it safe to preserve food by vacuum? Let's find out the article below!

1. Food preservation by vacuum

According to Wikipedia A vacuum is a space that contains no matter, a vacuum has a non-zero volume and zero mass. Since there is no matter inside, a vacuum is a place where there is no pressure.
Theoretically, a vacuum environment without matter means that there is no environment for microorganisms to live. But that's only true for the vacuum environment that exists outside of space. As for food, vacuum means to suck up all the air surrounding the food surface. Vacuum-packed food will always last longer than other preservation methods, other than canning. Regular plastic bags, foil, ziplock bags, and even airtight containers can't preserve food as well as vacuum sealers can.
Fruits, vegetables and meat will begin to spoil after a certain period of time because they are exposed to the air. Often mold and bacteria will grow, causing foods to change in their smell, color, and texture. Sometimes bacteria can grow without air, but mold doesn't grow without a healthy oxygen supply. When you vacuum your food, you remove almost all of the air from the bag. Once the air is removed, mold and some bacteria will not be able to live or grow. However, over time, the food you store can go bad if not refrigerated or frozen.
Other storage methods allow oxygen to enter through small holes. Even if you use an air-tight container, the amount of oxygen left inside the can can be enough to allow mold and other bacteria to grow and spoil your food.

The vacuum method also helps to avoid the loss of nutrients in the food, and preserves the freshness of the product. You can store more foods without the use of preservatives. Moreover, the vacuum will minimize the size of the food, and at the same time make the food placed next to each other do not mix odors. In addition, this method also retains the natural moisture of the food, without causing the food to evaporate water. prevent staining, food color loss caused by moisture in the air.
If you smoke food when it is very fresh and store it properly, it will keep for about 3-5 times longer than if you used other preservation methods. Here are specific examples:

2. 15 benefits of vacuum preservation method

If you are wondering whether vacuum preservation of food has been used in your life, here are some of the benefits of having food preservation with food vacuum:
Vacuum food preservation saves you time Easy storage and time saving when packing snacks or vegetables and vacuum freezing. Besides, when it's time to eat, you just need to take it out and use it. This is especially useful when cooking sous vide just add the ingredients you need to the VacMaster sous vide pot and cook until done. So you have a delicious meal and ensure food safety.
Preserving food by vacuum helps you save money You can buy meat in bulk and then divide it into servings and save time in the freezer for fresh meat up to 6 months. This helps us save money compared to buying your meat from the store every day before meals.
Prevent the growth of fungi and bacteria Vacuum preservation of food works to prevent the growth of mold or bacteria. Because, vacuum de-oxygenates your food, so mold and bacteria cannot grow without oxygen.
Vacuum to protect fresh food Vacuum to protect food has the effect of not dehydrating food to keep food fresh and prevent water from leaking out of the freezer causing freezer burn. Plus, the vacuum bag keeps your food out of the air, so moisture can't evaporate, becoming an excellent barrier from the elements.
Vacuum extends the shelf life of your food Your food's shelf life is greatly extended when you vacuum packaging. The special thing is that vacuum-sealed food can be preserved for 3 to 5 times longer than food in a box or plastic bag. However, the exact amount of time food will last in the vacuum process varies depending on whether you are storing it in the pantry, refrigerator or freezer.

Food keeps longer than Vacuum packed frozen food has an average shelf life of 2-3 years, while the average shelf life will last from 6-12 months depending on storage methods difference. In which most foods that are vacuum sealed will be kept in the refrigerator for 7-15 days, the preservation time is longer than other conventional preservation, in which 1-3 days the food will be stored. when stored normally in the refrigerator.
Vacuum makes packaging easier. Vacuum helps to pack effectively and safely. Food sealed with a vacuum sealer takes up less room in the refrigerator or freezer and allows you to easily see the food you are preserving.
No freezer burn with vacuum suction Vacuum suction provides food with an airtight environment, preventing freezer burn crystals from forming on your food. Vacuum seals the moisture in your food for a long time, allowing you to enjoy fresh-tasting food for months after you've stored it.
Vacuum food tastes better Vacuum seal keeps moisture, juice and flavor of food. You will feel the difference in taste.
Vacuum suction Keep food safe Vacuuming removes most of the oxygen, preventing the chemical reactions triggered by oxygen that cause food to spoil. Besides, vacuum also prevents the accumulation of bacteria that can spoil food.
Vacuum suction keeps food fresh Vacuum not only keeps food fresh, but also keeps fats in food from going rancid, keeps food from discoloring like it usually does in freezers and compartments. Don't let them get greasy or smelly.
Store liquid easily vacuum sealed Place liquid in freezer for a few hours to harden slightly. Then place the partially frozen liquid into a suction bag and leave space at the top for easier suction.

Vacuum food scraps Vacuum all leftovers from your meals instantly. This means you don't have to throw away food and can still use it for another meal. It freezes leftovers and they last for months and keep you from having to eat the same meal several days in a row. However, leave it out for a few weeks for a delicious meal.
Vacuum helps preserve fragile foods Vacuum storage of food is very convenient to pack all kinds of chips, be careful not to use vacuum or you will crush the contents. in.
Easy to mix food on the go with vacuum Separation of snacks or mixes into individual portions and vacuum. This makes it easy to take your snack rations with you on the go, keeping them in your bag, backpack or lunchbox for a boost of available energy.
Tip: to get the most out of your food's freshness, date the bag after you vacuum it up. You can keep track of when it is stored and when it should be used or eaten.
To extend the shelf life of food even further, clean it thoroughly before storing. Also, between packages, wipe down any surfaces used to avoid bacterial cross-contamination.

3. Limitations of food preservation by vacuum

Although currently the method of preserving food with a vacuum machine is very popular by many housewives, you should know that the food itself also contains a lot of air inside it. In addition, there are some types of anaerobic bacteria available in food, without air they can still live. Therefore, the vacuum method cannot prevent the spoilage of food, but it can only partially limit it.
Vacuum method only works to slow down the spoilage of food, but with the condition that it must be combined with low temperature preservation. According to research, reducing the temperature of cold storage of food to below 4oC and freezing to below -17oC can reduce the growth of microorganisms but not kill them.
In addition, not all foods can be preserved by this method such as corn, beans, flour, milk ... without using vacuum. Vacuum-sealed vegetables and fruits can only be stored for 3-4 days.

Better yet, when you choose to buy food, choose new, fresh and delicious foods and buy them in moderation. and if not used up, can be vacuumed but need to be washed and drained. Do not expose foods to hot water or boil them and then pour them into a storage bag, which will cause chemicals in the packaging to contaminate the food
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Reference sources: streetdirectory.com, vacmasterfresh.com