Home > WT - Ozone generators

Ozone has been used since the beginning of the century in treatments of water purification, as much in drinks as in residual waters, swimming pools, etc.
Ozone is used for the water disinfections since it disturbs aggressively the alive organisms without leaving chemical remainders that can affect health or the flavor of water.
Ozone is generated from the air or oxygen applying a high voltage discharge to turn part of oxygen (02) to Ozone (03). The "ozonized" gas is mixed to dissolve with water. The most efficient disinfections is obtained with 0,4 mg/l maintained for 4 minutes, that is to say a CT (Concentration in mg/l per Time in minutes) of 1.6. The amount of ozone required to reach these values of CT depends on the temperature of water, on pH, on the initial demand of ozone and on contact system. This amount is usually between 1 and 2 mg/l per doze of ozone in water.

LQS generations consist of: a dielectric tube through which oxygen is made pass. It then receives a constant electrical discharge (called crown effect) and that has been generated in a transformer. This causes the transformation of the oxygen molecule (02) of the air, in an ozone molecule (03). This gas (Ozone) is sucked by a Venturi system and is mixed with the water that is going to be treated.

In general it may be said that ozone has the following advantages:
- Elimination of the color, odor and flavor of water.
- Reduction of the turbid ness, the solid content in suspension and of the chemical and biological demands of oxygen.
- Ozone is a disinfectant product and it not only eliminates the pathogenic bacteria, but in addition it creates residue that inactives virus and other microorganisms that are not sensible to disinfections with chlorine.

 Process of Ozone
  • Rupture of the molecule oxygen (O2) with an electrical dischars in a generator constructed to that effect.
  • Two free atoms 0+0 are associated to oxygen molecules (O2) giving rise to trivalent molecules O3=ozono.
  • The high oxidating power of ozone molecules attacks microorganisms, organic and inorganic substances.
  • Once fulfilled the oxidating mission, it becomes pure oxygen again. Ozone is a gas (O3) that, as its formula indicates, is made of oxygen.

Present on natural form on the outer layers of terrestrial atmosphere, ozone may be artificially produced for industrial use. It is very unstable. A few minutes after its generation, it is recombined in pure oxygen. Contact and time: ozone bases its effectiveness on these two parameters.


- Is the most powerful oxidant after fluorine, it is 3000 times faster than, for example, chlorine and it is generated in situ. It needs neither packaging or storage.
- There are no by-products. It produces an only "eradicator" : pure oxygen.
- Does not produce scent, nor flavor.
- It is recombined in oxygen in a few minutes.
- It is an extraordinary bactericide, fungicide, viricide and eradicator of algal.
- It is the best water disinfectant. Totally innocuous.
- To produce ozone it is only necessary a generator, air, electricity and water.
- It does not damage the surroundings, it is inoffensive to man.

How Ozonization Works

1- A generator is a closed system that is fed on compressed air (approx 21% of it is oxygenate), water (for refrigeration) and electrical energy (for operation).
2- In the interior of the generator the simple oxygen molecules (O2) are bombed with electrical discharges.
3- When then dissociate they are recombined with other intact molecules of O2, producing ozone (enriched oxygen)
4- By means of a suitable installation, ozone is injected in the pipes, deposits, raw material or spaces that need its oxidating activity.

 Some Applications

The main applications of ozone at industrial level are listed below:

  • - Potable water purification
  • - Water for the drinks manufacture
  • - Swimming pools
  • - Water recreation purposes
  • - Ice manufacture
  • - Water for the cleaning of pipes, conduits, equipment in nutritional, chemical, pharmaceutical industries (as reactive in special oxidations)
  • - Water Provision of high quality: laboratories, electronics industry, etc.
  • - Treatments of industrial effluents.
  • - Secondary and tertiary treatments of urban effluents.
  • - Towers for water cooling.
  • - Environmental treatments: cold storage plants, ripening plants.

Water for Drink Manufacture
Ozone is used as tertiary treatment or, in the case of potable water, as the final phase of purification which implies that to be able to take advantage of all its potential it is advisable to filter the liquid.
Temperature sensibly affects the organization, because it increases the speed of reconversion and its average life can be reduced to few minutes.
Effect of pH: the presence of hydroxyls accelerates the process of conversion of ozone, that is why it is propend to work with a pH smaller than 8, if it is possible. In the generation phase, there are aspects that favor a good performance, the most important is the purification of air: humidity is critical since it allows extremely corrosive nitric acid formation. Ozone measurements are extremely important in the control of treatment. In the gaseous phase it is possible to quantify the ozone concentration by means of the absorption of ultraviolet light to 254 mm, by titer of 1 K oxidized in bubbling. And in the liquid phase it is possible by means of oxidizable reactors, measurement of the migration through a selective membrane, potential of reduction, etc.

Home - Contact Us

WWTP: Pretreatment - Biological Treatment - Sludge Treatment - Package Treatment Plants
WT: Reverse Osmosis Systems - Water Softners - Filtration - Ultrafiltration - UV Equipments - Ozone Generators - Package Treatment Plants

Versión Español

6110 NW, 32nd Terrace - Fort Lauderdale - Fl33309 - USA
phone/fax: 1 954 917 4081

Copyright © 2003 PWP Pure Water Process. All rights reserved.