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How Does Pasteurization Differ From Sterilization?

Pasteurization vs. Sterilization: The Differences Explained


Did you know that in 2018, the U.S. food preservatives market got valued at 375.3 million? This is due to the rise in demand for poultry products and meat. But, what does the food preservation market entail exactly?

Read on to learn about pasteurization vs. sterilization.

What Is Pasteurization?

Pasteurization is a process that kills pathogenic bacteria. It does this by heating them at a certain temperature within a time limit. This process can only destroy vegetative forms of bacteria.

Once this process is complete, the pasteurized products get stored in a refrigerator. This is so that saprophytic bacteria cannot develop. These are bacteria that can survive the pasteurization process.

The temperature range of pasteurization is 62 to 100 degrees celsius. The time also varies as it can last less than a second up to half an hour. The temperature depends on the time and vice versa.

There are also different methods of pasteurization that affect the temperature and time. The method depends on the type of product that is getting pasteurized. This means considering the target microorganisms, purpose, volume, and equipment available.

For example, the vat method gets used in the food industry a lot. This process kills bacteria and increases the shelf life of products.

What Is Sterilization?

The sterilization process destroys microorganisms and their spores. When it comes to pasteurization vs. sterilization, the sterilization process kills more. Sterilization saprophytic microorganisms, vegetative and spore forms, and viruses.

Physical sterilization uses coldness or heat. When the heat gets used, the process is dry or wet.

Chemical sterilization uses gases or chemicals. The different chemical compounds can bring advantages or disadvantages. This means alcohols may benefit a product better than acid.

Sterilization vs. Pasteurization

When it comes to pasteurization vs. sterilization temperature, pasteurization is generally colder. The most common sterilizing temperatures are 121 degrees Celsius and 132 degrees celsius.

Commercial sterilization vs. pasteurization is different because of how they get used. The types of sterilization are physical and chemical.

The main type of pasteurization is vat. You can also use tunnel pasteurizers.

Another difference between pasteurization vs. commercial sterilization is the shelf life. Sterilization has a longer shelf life.

The major difference between sterile vs. pasteurized is what they get used for. Sterilization gets applied in dentistry, medical surgery, food industries, packing industries, and microbiology.

Pasteurization gets applied in the treatment of culture mediums, medicines, and more. These mediums have ingredients like proteins and sugars. These mediums can get preserved through the pasteurization process.

Pasteurization vs. Sterilization Explained

Pasteurization vs. Sterilization is a common topic of conversation because of their similarities. Yet, their differences are major.

They especially get confused because they are so beneficial for the food industry. By reading this guide, you can understand how the two processes work to preserve food.

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