What are the Different Methods of Preserving Food
Methods of Preserving Food
Pasteurization:
- i) This method is used to preserve milk and is discovered by Louis Pasteur.
- ii) In this process milk is heated to 71 C and then cooled rapidly.
iii) The bacteria become retorted in growth.
- iv) Hence the milk is preserved for few days.
Refrigeration:
- i) In this process food is kept below freezing point.
- ii) This retorted the growth of enzymes and bacteria.
iii) Quick freezing helps in to maintain the taste of food.
- iv) By this process meat, fruit and vegetables are preserved.
Dehydration:
- i) In this process water from food is removed.
- ii) Dry food can remain safe for a long time because bacteria cannot grow on it without water.
iii) Meat and some vegetables are preserved by this method.
Canning:
- i) In this method food is first heated at very high temperature to kill bacteria.
- ii) Then food is sealed in metallic container.
iii) Hence food is safe from contamination.
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