difference between pasteurization and sterilization pdf

Difference Between Pasteurization And Sterilization Pdf

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Action of successive heat treatments in bovine milk fatty acids. Edvaldo N. Costa; Ellen C.

Difference Between Sterilization and Pasteurization

Sterilization of milk is aimed at killing all microorganisms present, including bacterial spores, so that the packaged product can be stored for a long period at ambient temperature, without spoilage by microorganisms. Since molds and yeasts are readily killed, we are only concerned about bacteria. The latter two are examples of so-called UHT ultra-high-temperature, short time treatment. It does not inactivate all enzymes, e. The undesirable secondary effects of in-bottle sterilization like browning, sterilization flavor, and losses of vitamins can be diminished by UHT sterilization. During packaging of UHT-sterilized milk, contamination by bacteria has to be rigorously prevented. After UHT sterilization, certain enzymatic reactions and physicochemical changes still may occur.

Some of the microorganisms are useful and even necessary for everyday life. However, there are a huge number of microorganisms that can cause disease or damage to useful resources. Different methods are used in order to kill harmful microorganisms. The sterilization is a process that destroys all microorganisms and their spores, while the pasteurization destroys only the vegetative forms of the bacteria and the spores survive. Sterilization is a destruction of all microorganisms and their spores.

Difference Between Pasteurization and Sterilization

Pasteurization vs Sterilization. Food preservation is a well-known process of treating and handling food. This is mainly done to preserve the quality and the nutritional value of food, thereby extending the shelf life of foods. It usually involves suppressing microbial growths or killing microbes and their spores or preventing microbial growth. Pasteurization and sterilization, largely, make use of food preservation techniques. Both techniques use heat as the main energy source to change the conditions in food, and hence, they are called thermal processing techniques.

For thousands of years, humans have used various physical methods of microbial control for food preservation. Common control methods include the application of high temperatures, radiation, filtration, and desiccation drying , among others. Many of these methods nonspecifically kill cells by disrupting membranes, changing membrane permeability, or damaging proteins and nucleic acids by denaturation, degradation, or chemical modification. Various physical methods used for microbial control are described in this section. Heating is one of the most common—and oldest—forms of microbial control.

Difference Between Sterilization and Pasteurization (With Table)

Depending on the desired storage method, at ambiant or refrigerated temperature, the level of treatment of the product should be set, allowing the manufacturer to opt for sterilisation or pasteurisation. Sterilization or appertization, from its inventor Nicolas Appert is a preservation process that consists in sterilizing perishable foodstuffs such as vegetables, fruits or meat in airtight containers such as : metal cans, glass jars Sterilization is intended to destroy all germs and particularly pathogenic bacteria in their vegetative and sporulated form. Sterilization therefore makes it possible to stabilize the product at room temperature permanently and to obtain a long shelf life from a few months to a few years depending on the product. Some examples of sterilized products are: canned fish, babyfood in jars, canned or jarred vegetables, sauces in pouches, bottled milks, pet food in pouches, in trays, babyfood in pouches.

Foods consist of different major nutrients such as carbohydrate, protein, fat, minerals and vitamins. As a result of rich nutrient content in fresh foods, they are highly susceptible to microbial spoilage. Thus, food is often pasteurized or sterilized in order to destroy their pathogenic microbial load.

What are the differences between Sterilization (appertization) and pasteurization?


A Microorganism or commonly known as a microbe is an organism that is only visible through the microscope. Such microorganisms may be either unicellular, multicellular, or cell clusters. There are infinite microorganisms in existence. They can be broadly divided into seven categories: fungi , algae , bacteria, protozoa, archaea , viruses, and animal parasites. Some are useful and beneficial for everyday life as they produce oxygen thereby maintaining human health, provide nutrients for plants as they help in decomposing organic material whereas some microorganisms may cause harm as they spread diseases.

Она услышала шелест одежды, и вдруг сигналы прекратились. Сьюзан замерла. Мгновение спустя, как в одном из самых страшных детских кошмаров, перед ней возникло чье-то лицо. Зеленоватое, оно было похоже на призрак. Это было лицо демона, черты которого деформировали черные тени. Сьюзан отпрянула и попыталась бежать, но призрак схватил ее за руку. - Не двигайся! - приказал .

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What is Pasteurization?

Большой Брат, или Брат, как его обычно называла Мидж, - это аппарат Сентрекс-333, размещавшийся в крохотном, похожем на подсобку кабинетике рядом с директорскими апартаментами. Большой Брат был частью мира, в котором царила Мидж. Он получал информацию со 148 камер кабельного телевидения, 399 электронных дверей, 377 устройств прослушивания телефонов и еще 212 жучков, установленных по всему комплексу АНБ. Директора АН Б дорого заплатили за осознание того факта, что двадцать шесть тысяч сотрудников не только огромная ценность, но и источник больших неприятностей. Все крупные провалы в сфере безопасности в истории агентства происходили внутри этого здания. В обязанности Мидж как эксперта по обеспечению внутренней безопасности входило наблюдение за всем, что творилось в стенах АНБ… в том числе и в кладовке столовой агентства.

Sterilization (microbiology)


Alethia B.

is a destruction of all microorganisms and their spores.


Ronaldo M.

Sterilization refers to any process that removes, kills, or deactivates all forms of life in particular referring to microorganisms such as fungi , bacteria , spores , unicellular eukaryotic organisms such as Plasmodium , etc.


Julie G.

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