revised_Application technology COD removal with ozone in the Water utilities sector

Cracking of persistent COD with ozone

Equipment, expertise and gas for a complete solution


The strong oxidising agent ozone eliminates many problematic substances totally, or oxidises them to the extent that they can then be treated biologically. Supplementary treatment with ozone is carried out before or after biological cleaning.


Ozone consists of three oxygen atoms and is seen as one of the strongest oxidising agents. Nevertheless, it reacts to form relatively unproblematic oxidation products and oxygen and does not lead to salting up of the treated waste water.  Depending on the task, ozone is used for direct and specific reaction with individual wastewater constituents or, in the so-called Advanced Oxidation Process, for the formation of extremely reactive but non-selective OH radicals. Ozone cannot be stored and so must be produced on site from oxygen in ozone generators.  

The advantages of ozone treatment at a glance:

Increases COD breakdown rate 
Ensures compliance to limits consent levels and annual loads for COD, colour, and other sum parameters.
Avoids salination of water and facilitates the reuse of treated water   
Eliminates micro-pollutants


With experience and know-how, Messer ensures that you can take full advantage of the benefits of an ozone treatment with pure oxygen supply at your waste water treatment plant. For this purpose Messer offers:

Complete pilot plants for feasibility studies on a laboratory scale
Experiments in expert laboratories
Oxygen storage and oxygen supply
Ecovap evaporator for an environmentally friendly and cost-effective use of the inherent coldness of cryogenic oxygen
Supervision of the tests and commissioning
Support from our national and international experts

revised_Customer process COD removal with ozone in the Water utilities sector

COD removal

Removing resilient contamination



Alege o acțiune



Alege o acțiune