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What is Pasteurization?

Biology | 7-14 yrs | Interactive, Reading Pod

All food and liquids have an expiry date.

That is, after some time if they are not consumed they will start getting spoil t and will become unfit for consumption due to development of different bacteria.

So does this mean that we have to consume all of the food or liquid that we buy at one go?

Luckily, this is not the case and we can preserve the food and liquid for longer periods and we and consume it whenever we want it.

We have a French chemist and microbiologist named Louis Pasteur to thank for this.

He invented the method of pasteurization in 1856.

Pasteurization : Definition

The act or process of heating a beverage or other food, such as milk or beer, to a specific temperature for a specific period of time in order to kill microorganisms that could cause disease, spoilage.

Methods of Pasteurization

The act or process of heating a beverage or other food, such as milk or beer, to a specific temperature for a specific period of time in order to kill microorganisms that could cause disease, spoilage.

1. Batch or Vat Pasteurization

Batch pasteurization is the most common and easy method of pasteurizing. It involves heating milk to high temperature of 60 degrees in a large container.

The milk Is kept at that temperature for around 30 minutes. This method is the most simplest and can be done on the kitchen stove at home.

2. HTST Pasteurization Method

High temperature short time pasteurization method is a very common method for pasteurizing in large quantities.

This method is carried out in a machine called heat plate exchanger and is much faster than the batch pasteurization method and also uses less energy. In this method the milk is heated to 72 degrees and it is held at that temperature for 15 seconds and then it is quickly cooled.

Side Effects of Pasteurization

The only side effect of pasteurization is that along with the harmful bacteria , it also destroys some of the good elements like vitamins and minerals.

Thus we do not get the complete health benefits the raw milk has to offer.

Why is Pasteurization important?

It is important because pasterurization kills all the germs which cause diseases like diptheria, undulant fever, tuberculosis, typhoid fever, dysentery, food poisoning, septic sore throat, and Q-fever and keeps us safe and healthy.

Looking for more biology articles and videos? Go to: Biology for Kids.

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