Ozone Sterilization

Presented By:

yadav

IntroductionOzone is nothing more than three oxygen molecules electrically bound together. Unlike the stable oxygen you breathe (O2), ozone has extremely great oxidative power and very ready to react to germs, viruses, and a host of microbes that are known to cause illness.

Ozone

Today, ozone sterilization, sanitation, disinfection for food and water has been the hot topics.

It just came to realization that ozone is the best technology available and is gradually replacing older methods for many cleaning applications.

In June 1997, an Expert Panel of Food Scientists, convened by the Electric Power Research Institute, declared ozone to be Generally Recognized As Safe (GRAS)

Significance in food industryThe idea of ozone sterilization is so brilliant that almost all water suppliers in almost every country use ozone as disinfectant while replacing its old sterilizing methods like chlorination.

Ozone also is useful in deodorizing air and water.

Ozone is a potent antimicrobial agent.

It can effectively kill viruses, bacteria, fungi, and parasites, including those causing food spoilage or human diseases.

Features and ApplicationOzone is said to be 50 percent more powerful and to

act 3,000 times faster than chlorine at 100 times the strength.

This eliminates the need for sterilization with scalding water or chlorine.

Ozone charged water is now utilized for CIP for cleaning of pipes, tanks , floors , surfaces of equipments.

One advantage of an Ozone system in food processing is that it provides the user an opportunity to look into the REUSE of the water .

This could bring about lots of savings especially if there is a cost to water and availability concerns.

Treatment with ozone does not leave a residue in the product

Concept of generating ozone

The primary process used commercially today to make ozone is called electrical discharge or corona discharge.

Inside the machine, a high voltage electrical spark is fires across a gap (like a spark plug in a car engine) to turn oxygen into ozone.

How it works

Oxygen (O2) Converted in to O3

Kills Microorganisms in

High voltage Electricity

How it really works on micro organisms

Healthy bacterial cell Exposed to ozone Oxidative burst

Puncturing of the walllose its shape in seconds

Death of the cell.

Ozone Sterilizer 

Machines that generates ozone are known as ozone sterilizers machine.

There are basically two type of machines are there viz., Air-based Water-based ones.

However, they both work under the same concept as they differ only in the method of ozone delivery.

Water-based Ozone Sterilizer

• For this particular type of ozone sterilizer, ozone gas are pumped into a basin where the target items such as meat, vegetable and fruits are submerged in water.

• The activity of ozone occurs in the water itself leaving coagulation of impurities like pesticides, herbicides, and bacteria clump floating on the surface and further being discarded.

• This is the most preferred type of machine as it is multifunctional (also capable of sterilizing water), clean and simple to be used.

Air-based Ozone Sterilizer• Unlike the water-based type, the delivery method

used in air-based ozone sterilizer is rather simple.

• Food items are placed directly into the enclosed chamber of the machine and ozone gas generated are shot directly onto the surface of the target allowing the disinfection activity to occur in the air.

• This machine uses less power compared to a water-based machine.

Equipments

Gaseous or aqueous ozone generators are commercially available and relatively inexpensive instruments.

Generators vary in production capacity from a few pounds to hundreds of pounds of ozone per day.

It should be cautioned, however, that suitable treatment chambers, monitoring devices, and excess gas destruction units, should be designed and integrated with the ozone generators to produce functional food treatment systems

ConclusionWide spread acceptability of Ozone has made it very

popular in Food Processing Today.

The properties of Ozone has allowed its unrestricted and any food processing application.

Ozone has been demonstrated as the most effective Biocide with significantly increased lethality.

Ozone requires very low contact time compared to Chlorine and requires much lower concentrations for effective kill ,compared to conventional biocides

Any Questions