ECO-LOGICAL TECHNOLOGY
OZONE SYSTEMS-DOMESTIC AND INDUSTRIAL
Eco-Tec

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P.O. Box 613, Kloof, 3640                     Tel   (+27) 31 764 5231
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Ozone Use in the Dairy

THE USE OF OZONE IN DAIRIES AND DAIRY PRODUCTS

 Ozone can be used in dairies as a gas which sterilises the air, or in ozonized water as a more effective and healthier alternative to chlorinated water.

 REVIEW OF EFFICACY:

 1) Ozone effectively prevents growth of surface moulds on cheeses in storage areas during curing.

 2) Exposure to low levels of ozone prevents the development of new mould growths on the sides and ends of unwaxed cheeses.

 3) Free mould spores significantly reduced in rooms treated with ozone.

 4) The use of ozone does not affect the flavour of any of the cheeses.

 5) 0.1mg/M3 of ozone in a cheese ripening room inactivates 80% of the mould spores without affecting the organoleptic qualities of the cheese.

 6) Bacteria levels on the upper surface of milk are reduced significantly.

 7) Lab tests carried out on the use of ozone on proprietary powdered milk showed the control sample bacteria levels 1000 times higher than on the sample treated with ozone.

 8) Storage of commodities such as cheese, bacon, butter and vegetables for long periods in the same transport compartment or area without any cross- contamination.

 9) There are many different lab reports, which show the effectiveness of ozone over routine cleaning methods. Swabs taken from food processing tables, warehouses or area after routine cleaning with a chemical cleaning solution, compared with swabs from ozonated area. These tests show ozone has a kill rate of 99.%.  Bacterial counts after routine cleaning methods showed their ineffectiveness in the prevention of cross- contamination and spoilage.

 10) Ozone has been compared with chemical fogging and UV exposure as different alternatives to air disinfection. Ozone was shown to be both effective and reproducible in its effects. UV was effective, but shadowing posed a problem in a factory environment. Fogging was shown to be the least effective method of air disinfection.

 11) Ozonated water has been shown as an effective alternative to chlorinated water in the disinfection of dairy equipment. Not only does it destroy surface-attached bacteria, but requires no heat, and therefore uses less energy than sanitising systems which use steam or hot water.

 APPLICATION EXAMPLES:

       1.      Dairies

-Using ozone in the production area to control the growth of yeast and mould

-The ozone generator runs for 3 hours, flooding the area overnight with the help of 2 fans

-The ozone is allowed to degrade for 2-3 hours before the staff come in for the morning shift

-Have had great success in keeping down the levels of mould and bacteria

 2.      Cheesewrights

-Produce and distribute unpasteurized cheese made from cow, sheep and goat milk

-Using ozone to flood the production area over night in order to kill staphylococcus aureus

3.      Yoghurt

-Manufacturers of yoghurt

-Use an ozone generator to control bacteria spore levels on equipment in the processing area overnight

-Significant reduction in spore counts

     - flood the premises with ozone

 

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