Traitement de l'Eau à l'Ozone et Oxydation Avancée

Le puissant oxydant pour la destruction des micropolluants

Environmental & Water Treatment Commercial Production $2.5 billion

Aperçu

Ozone (O3) treatment is used in drinking water disinfection and advanced oxidation processes (AOPs) to destroy micropollutants including pharmaceuticals, pesticides, and endocrine disruptors that conventional treatment cannot remove. Ozone is 52% stronger than chlorine as an oxidant and decomposes to oxygen without leaving residual chemicals. Over 3,000 water treatment plants worldwide use ozone. When combined with hydrogen peroxide or UV light, ozone generates hydroxyl radicals -- the strongest oxidant available in water treatment.

Procédé chimique

Ozone is generated on-site by passing dried air or oxygen through a corona discharge generator at 10-20 kV, producing 1-12% O3 by weight. The ozone-rich gas is dissolved in water through fine bubble diffusers or injectors at doses of 2-10 mg/L. Contact time of 10-20 minutes in a baffled contactor achieves disinfection and micropollutant oxidation. Off-gas containing residual ozone is destroyed by catalytic or thermal decomposition.

3O2 ->[corona discharge, 10-20 kV] 2O3 (ozone generation)
O3 + micropollutant -> oxidized products (direct ozone oxidation)
O3 + H2O2 -> OH. + O2 + HO2. (AOP -- hydroxyl radical generation, E0 = 2.80 V)

Matières premières

  • Oxygen (O2) — Air separation or on-site PSA/VSA generators (Ozone precursor)
  • Electricity — Grid power (Energy for corona discharge (8-17 kWh/kg O3))

Produits finis

  • Disinfected and oxidized water — Drinking water, wastewater reuse, swimming pools (No chemical residual -- O3 decomposes to O2)
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Environmental Impact

Ozone treatment eliminates the need for chlorine in primary disinfection, avoiding disinfection byproducts. However, ozone can form bromate (BrO3-, a probable carcinogen) from bromide-containing water. Energy consumption is the main environmental cost. Transformation products from micropollutant oxidation require monitoring.

Considérations de sécurité

Innovations récentes

Electrolytic ozone generation produces high-concentration ozone from water without gas handling.
Ceramic membrane ozonation combines ozone dissolution with membrane filtration.
Catalytic ozonation using heterogeneous catalysts (MnO2, TiO2) enhances hydroxyl radical production.

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Frequently Asked Questions

What industry uses Traitement de l'Eau à l'Ozone et Oxydation Avancée?
Traitement de l'Eau à l'Ozone et Oxydation Avancée is used in the environmental & water treatment sector at commercial production scale.
What process is involved in Traitement de l'Eau à l'Ozone et Oxydation Avancée?
Ozone is generated on-site by passing dried air or oxygen through a corona discharge generator at 10-20 kV, producing 1-12% O3 by weight. The ozone-rich gas is dissolved in water through fine bubble diffusers or injectors at doses of 2-10 mg/L. Contact time of 10-20 minutes in a baffled contactor ac
What is the economic significance of Traitement de l'Eau à l'Ozone et Oxydation Avancée?
Traitement de l'Eau à l'Ozone et Oxydation Avancée has a market value of $2.5 billion.
What is the environmental impact of Traitement de l'Eau à l'Ozone et Oxydation Avancée?
Ozone treatment eliminates the need for chlorine in primary disinfection, avoiding disinfection byproducts. However, ozone can form bromate (BrO3-, a probable carcinogen) from bromide-containing water. Energy consumption is the main environmental cost. Transformation products from micropollutant oxi
What raw materials are used in Traitement de l'Eau à l'Ozone et Oxydation Avancée?
The main raw materials include: Oxygen (O2), Electricity.