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Ozonators

General Features and Technical Information

Western nations started using ozone for their water purification needs decades ago. The first ozone plant was built by France in 1906.

The generation of ozone is very energy-intensive with some 90% of the power supplied to the generator being utilized to produce light, sound and primary heat. Vital factors that determine the quality of ozone generated are: oxygen concentration in the feed, humidity and purity of the feed gas, cooling water temperature and electrical parameters. To minimize the energy that is used at a high ozone yield, it is important that these factors are optimal.

The advantage of ozonators for treating water and waste water is that ozone destroys bacteria, virus, mould, mildew, spores, cysts, yeast, fungus, smoke, organic compounds (which causes odour and bad taste) and inhibits algae growth. Ozone also oxides iron, sulphur, manganese and hydrogen sulphate. Ozone keeps water, fresh and sparkling clear.

It has a faster reaction rate than chemicals.Ozone does not have to be purchased or stored. Ozone does not affect the pH balance in water thus eliminating pH adjustments. Ozone as a technology does not leave any chemical by-products in water and also does not leave any odour or taste. Ozone is also not a carcinogen. Ozone generation is measured in grams.

The formation of oxygen into ozone occurs with the use of energy. This process is carried out by an electric discharge field as in the CD-type ozone generators (corona discharge simulation of the lightning). In this process, oxygen molecules are subjected to a high level of electrical charge. This imparts higher energy to the oxygen molecules and results in high level of excitation of the oxygen molecules thereby splitting them into atomic oxygen. These atoms recombine with remaining oxygen molecules to form ozone under the same high energy excitation.

Alternatively, ozone can also be generated by UV radiation as in UV-type ozone generators (simulation of the UV rays from the sun). In this process, oxygen molecules are exposed to UV radiation at 185 nm wavelength which excite the oxygen molecules in the same way as corona discharge does to form ozone. However, ozone formed this way will have very low concentrations.

Disinfection by ozone takes place by rupture of the cell wall, which is a more effective method than chlorine which diffuses into the cell protoplasm and inactivates the enzymes. Ozone level of 0.4 ppm for 4 minutes has been shown to kill any bacteria, virus, mold and fungus.

Mold and mildew are very easily controlled by ozone in air and in water. Giardia and cryptosporidium cysts are susceptible to ozone but not affected by normal levels of chlorine.

Heavy metals in water are also oxidised with ozone. Ozone oxidizes transition metals to higher oxidation state where they form less soluble oxides and can be removed by filtration. Iron, for example, exists in its ferrous state when dissolved in water. Ozone oxidizes ferrous to ferric iron which with water forms ferric hydroxide that is insoluble in water and precipitates. Similarly, metals like arsenic, cadmium, chromium, cobalt, copper, lead, manganese, nickel and zinc can be ozonized to their oxides.

MORF INDIA offers a wide range of pre-engineered and packaged ozonators, oxygen generators, venturi injectors, oil-free air compressors, air dryers and ozone destructors to suit various treatment requirements. We have both air-cooled and water-cooled systems. These ozone generators are rugged, modular and come along with suitable accessories according to the applications.


General Applications

Purification of drinking water at homes, offices and other commercial establishments.

Sterilization of bottles/cans used for packaging water

To increase the shelf life of packaged drinking water (bottle/can)

Used in the beverages industry/fish hatcheries/pharmaceuticals

Disinfection of recirculation water in AC/Cooling tower systems

Tertiary treatment for WWTPs (STP/ETP)

Increases the dissolved oxygen content in stagnant / contaminated waters (lakes and ponds)

Used for air purification applications in homes, hotels, hospitals, cars, etc.

Used as a commercial bleach for waxes, oils and textiles and as a deodorizing agent.

Cleans and removes chemical residues on fruits and vegetables

Used to disinfect contaminated water in swimming pools and spas