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The Solution


In order to control the proliferation of the ferrous-based ochre leading to expensive problems for our homes, “Solution Ocre Ferreux®” developed a unique and patented process called RODO®

This process consists of 4 stages :

  • Rinsing: We proceed with a very high-pressure rinsing of the drainage conduit, the backwater valve and the conduit connecting the home to the municipality. The water used is enriched with ozone in order to begin, from the first stage, the destruction of the bacteria.
  • Oxidation: We inject a solution made of ultra-pure concentrated ozone, reactive and very powerful in the drainage conduit in order to treat the conduit up to the connection to the municipality conduit. Unlike the rinsing stage, this stage is not performed under high pressure. In order to oxidize the bacteria in the drain and especially in the ground surrounding the drain, the oxidation stage rather works with the volume of water and ozone injected in the drains through cleaning vents.
  • Disinfection: We ensure the total and complete disinfection of the drainage system. The drainage system consists of the ground surrounding the drain, the internal and external walls of the drain, the backwater valve as well as the evacuation conduit up to the connection to the municipality. This stage is important and is focused on the contact time between the oxidizing solution and the bacteria.
  • Ozoflotation: The ozoflotation is in fact the conglomeration in non-harmful flakes of the bacteria in suspension rendered inert by the oxidation and disinfection stages. The conglomerated flakes are evacuated from the circulation of water in the ground surrounding the drain and inside the drain, up to the evacuation conduit connected to the municipality. This last stage completes the cleaning following the previous stages of oxidation and disinfection.




The ozone is produced on site by means of complex state-of-the-art equipment. It was specially fabricated for “Solution Ocre Ferreux®” in close collaboration with the manufacturer and their test laboratory. This unique partnership brings, in the end, a machine able to meet the requirements needed for the destruction and oxidation of the bacteria causing the ferrous-based ochre. The system is controlled by a computer in order to address the multitude of factors peculiar to each type of soil and drainage systems we need to treat. The use of the ozone for the treatment of ferrous-based ochre is unique to “Solution Ocre Ferreux®” as the only company in the world who owns the patent. This assures you that our process has been rigorously tested and demonstrates the seriousness of our process.


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The ozone is a chemical compound containing 3 atoms of oxygen (O3). Its structure is a resonance between three states. Metastable to ambiant conditions, tends to decompose naturally into dioxygen. At room temperature, it is a pale blue gaz. It liquefies at -111,9 °C in the form of a particularly unstable dark blue liquid and solidifies at -192,5 °C.

Contrary to the odourless dioxygen, the ozone is preceived by the human sense of smell; its smell is very characteristic, slightly pungent. It is toxic when inhaled in large quantities.

The ozone was first discovered in 1781 by Martin Von Marum, then the molecule was isolated in 1839 by the Swiss chemist Christian Friedrich Shonbein. He so called it by referring to the Greek root ozein (exhale a smell, to smell).


At the industrial scale, the ozone is produced using short wavelengths ultraviolet radiations emitted by a mercury vapour lamp or by a process of cold discharge (corona discharge) which uses a high electrical field. The discharge device is constituted by two metal plates separated by a layer of air and an electrical insulator of high dielectric constant. A high bias voltage is applied between the two plates, which entails the dissociation of the molecules of oxygen from the layer of air and their recombination in ozone. The ozone is an oxidizer and a powerful disinfectant. It presents certain advantages in comparison to other oxidizers usually used in the industry.


The ozone presents a series of advantages with respects to the chlorine used for water treatment, which explains its use in spite of the often significant cost of a water ozonization installation. These advantages are as follows:

  • It does not remain present in the water;
  • It does not provoke the appearance of organochlorinated products, which can be carcinogenic;
  • It does not leave a bad taste unappreciated from consumers of drinking water

But it leaves a minimal blue tint to the water.

The ozone is used in the treatment of water for several functions :

  • Iron oxidation;
  • Performance improvement of sand filters;
  • Improvement of the flocculation (called ozoflotation);
  • Disinfection of the water;
  • Elimination of harmful organic compound, in particular pesticides and herbicides. For this application the ozone is generally injected upstream of an active coal-based filter.


This application is highly prevalent in Anglo-Saxon countries and less in continental Europe. The ozone is essentially used for the washing of white linen in commercial installations.


The ozone is used in the food-processing industry for two very different applications :

  • The ozonization of cold rooms;
  • The washing of food products in ozonated water.


The wafers intended for the manufacturing of integrated circuits are washed with ozonated water with the objective to eliminate potential traces of organic matter.

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