What methods of food preservation are available?

October 26, 2021

Preserving food in hot weather is a major challenge. It is important to know not only how to eat food in the summer heat, but also how to preserve it to ensure food safety and retain as much nutrition as possible. It is also important to know how to store home cooked food to ensure that it is safe and retains as much of its nutrients as possible. Because improper storage It is important to know how to preserve food in the summer heat.

How to preserve food – leftovers

Dry leftovers in a clean container, crisper or plastic bag. Wrap them well and then put them in the fridge. Next time you take them out, heat them well. Fruit that you can’t finish should be covered with clean plastic wrap and cut off the top layer before putting it in the fridge.

Cryogenic preservation

Low temperature storage inhibits the reproduction of organisms and slows down the rate of spoilage, but it does not completely kill microorganisms. Care should be taken when storing at low temperatures to control the temperature. Generally speaking, the lower the temperature, the longer the preservation time.


Food is processed at high temperatures to kill most bacteria and enzymes. If treated with airtight, vacuum and rapid cooling, it can effectively delay spoilage and prolong the shelf life of food. For example, we often drink pure milk in bags, beer, pasteurised milk, etc.

Dehydration drying

Dehydration drying is the process of reducing the moisture in food to below a certain limit so that microorganisms are less likely to grow and multiply and enzyme activity is inhibited. Common methods of dehydration used in the home are sun drying, shade drying, heat evaporation or freeze drying, to name but a few. It is worth remembering that although sun drying is a simple method, a lot of vitamins are lost.

How to store eggs

Eggs in boxes are mostly cleaned, disinfected and coated before leaving the factory, which ensures the quality of the eggs and eliminates the need for cleaning, while eggs in bulk are generally not cleaned and should be gently wiped off with a clean cloth before being placed in a separate box in the freezer to avoid cross infection.

How to preserve meat

Pork, beef, lamb and poultry do not have the same protective mechanisms as vegetables and are susceptible to bacterial growth whether raw or cooked. The growth of bacteria can easily occur whether raw or cooked. Raw meat, in particular, contains a lot of bacteria, so it is better to heat it up to preserve it.

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