Ozone Application Experts

Ozone offers a range of advantages making it ideal for a host of applications. De Nora's experience in ozone generation covers the design, fabrication, installation and aftersales support of systems for over 1,300 plants in municipal water, wastewater, Advanced Oxidation Processes (AOP), micropollutant treatment and a host of other industrial processes.

Municipal Wastewater
Ozone is generally used as final stage for colour and odor removal, but also for oxidation of specific pollutants and final disinfection.

- Wastewater final polishing and disinfection: disinfection, odor and color removal, cyanides, phenols and complex organic molecules oxidation. A final ozone treatment enables water reuse for applications such as irrigation and wash-water.
- Ozone and Biofiltration: the combination of DE NORA TETRA™ and Capital Controls® technologies to achieve a high quality and reusable water. COD, BOD, TSS, complex organic molecules such as micropollutants and nitrogen compounds are removed via a single final polishing stage.


AOP (Advanced Oxidation Process)
Pollutants and molecules are becoming more and more complex and standard processes or stand alone technologies are not enough.

For difficult industrial applications, De Nora combines ozone and/or ultraviolet, peroxide and electrochemistry to design cost effective advanced oxidation processes that through OH radicals formation can treat very hard pollutants and complex molecules. Capital Controls ozone can perform laboratory tests or on-site analysis through to specific pilots plant to define the most effective combination of technologies.

Micropollutant treatment
Treating endocrine disrupting compounds (EDCs) in pharmaceutical and agriculture wastewater.

Industrial Wastewater
Industrial wastewater is caracterized by specific pollutants that cannot be treated simply by traditional biological and chemical processes.

- Wastewater Final Polishing
- Biological Sludge Reduction

Swimming Pools & Spa
Ozone can be used for private, municipal or commercial swimming pools.


Municipal Drinking Water
Thanks to excellent disinfection and oxidation qualities, ozone is widely used for drinking water treatment. Ozone can be added at several points throughout the treatment system, such as during pre-oxidation, intermediate oxidation or final disinfection. Usually, it is recommended to use ozone for pre-oxidation, before sand filters or with active carbon filters (GAC).


Biological Sludge Reduction
Biological sludge disposal is one of the major costs for a wastewater treatment plant. Biological Sludge Oxidation treats a partial stream of the return sludge and cansignificantly reduce operating costs: reduction of up to40-50% of additional sludge requiring disposal, 30% of chemicals for sedimentation and flocculation, 30% of dewatering costs, 25% of filtration costs, 25% of transport costs and 90% reduction of filamentous bacteria (main cause of foaming and bad bulking) is achievable.

Primary and Process water:
Oxidation of iron, manganese and organic compounds contained in well water for drinking purposes or as process water.


Air and Gas Treatment

Odor Removal

NOx Reduction

Food and Beverage
Ozone can be used as a gas or dissolved in water for a range of applications
- Drinking water disinfection: filling machines and bottles washing by ozonated water.
- CIP (Cleaning-In-Place) circuit disinfection and biofilm formation prevention.