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Drinking water

Ozone for Drinking Water

Ozone generation from pure oxygen for drinking water disinfection, and taste and odour removal

Ozone can be added at several points throughout the drinking water process, such as pre-oxidation, intermediate oxidation or final disinfection.

Ozone is an unstable product that cannot be stored and needs to be produced on-site from oxygen through dedicated generators. Air Products, as an oxygen major supplier, has over the years developed the know-how to help its customers optimise the ozone processes.

Benefits of Using Oxygen

Oxygen vs Air for Ozone Production

The use of pure oxygen to produce ozone allows higher concentrations in the feed gas that provides higher solubility

Less Energy Consumption

Pure oxygen provides direct costs savings versus air on ozone production by reducing the required power by 2.5

Less Maintenance Costs

Pure oxygen is compatible with any ozone generator where it delivers longer life and savings on maintenance costs

Flexible Design

Using pure oxygen delivers useful generation flexibility that is required in any water treatment processes

Are you interested in ozone process optimisation?

We can help you enhance your treatment and give advice on the options to increase your productivity or efficiency.


Ask the Expert

Tim Lebrecht

Tim Lebrecht

Commercial Technology-Water Systems

“Should I use oxygen or air for my ozone generator?”
For oxygen to form into ozone, oxygen molecules must be cracked and reformed. This takes energy in the form of electrical excitation of oxygen that disassembles the oxygen molecules. This is usually accomplished with high voltage (corona discharge) ozone generators. Once pulled apart, most molecules will revert to the stable form of oxygen. However, some of the oxygen is converted into ozone in this process. That process requires a lot of energy to crack the molecule and obtain a low concentrated flow of ozone. If air is used the generators will consume much more energy than using pure oxygen because of the huge concentration of inert gases such as nitrogen. Pure oxygen processes are more efficient due to the concentration of oxygen. In parallel, the ozone concentration can be increased from 3-4% with air to 12-14% with oxygen using three times less energy. The high ozone concentrated flow is also more effective in term of mass transfer for further uses.

What is the Main Benefit of Using Pure Oxygen Instead of Air?

Pure oxygen uses higher ozone concentrations giving higher solubility and faster reactions. Pure oxygen ozonisers produce ozone concentrations in the range of 10-14% w/w.

Higher ozone concentrations equal higher treatments efficiency.



Air Products gases, typically provided in gaseous and liquid form, enable customers in a wide range of industries to improve their environmental performance, product quality, and productivity.


In addition to its use as a respiratory gas for healthcare applications, its strong oxidizing properties benefit many industries by improving yields, optimizing performance, lowering costs and reducing carbon footprint compared to other fuels.