New Deep Oxidation Systems AOP

Due to the need to treat organic and inorganic pollutants that are difficult to oxidize, such as NDMA (nitrodimethylamine), MTBE (Methyl tertiary butyl ether), 1,4-dioxane, peptides, pharmaceutical products and other substances that have a negative effect on living organisms, and especially the elements that determine TOC (Total Organic Carbon) and COD content, WEDECO offers a unique AOP (Advanced Oxidation Process) deep oxidation system, under the general name MiPRO. The main concept of the technology is the combination of the simultaneous use of several oxidizing agents, such as ozone, ultraviolet disinfection, hydrogen peroxide. These oxidizing agents can be used in combinations of O2 + H2O2, UVR + H2O2, O3 + H2O2 + UVR.

Formed in water, after the introduction of oxidizing agents, hydroxyl radicals enter into an oxidation reaction with a fast kinetics of the reaction process, which ensures the elimination of numerous difficult-to-oxidize contaminants. Thus contaminated liquids can be treated with the most suitable combination of oxidizing technologies.

Used in AOR processes - ozone, hydrogen peroxide, ultraviolet radiation, chlorine - are themselves powerful oxidizing agents, both on their own and in combination with each other. The right combination of these processes will provide the most efficient generation of hydroxyl radicals for reducing pollutant factors.

• Ozone + Hydrogen Peroxide: MiPRO eco3 and Pro3mix. Very efficient generation of hydroxyl radicals, effective for many AOP applications. The Promix system is an intelligent ozone supply and reaction system, and is suitable for source water with a high content of bromides, preventing the formation of bromates in the traditional water treatment process. Promix uses ozone in a new way, in addition to preventing the formation of bromates, it simultaneously oxidizes other unwanted contaminants. Ozone oxidation is usually one of the main alternatives to chlorination, as no THMs or other by-products of chlorination are formed.
• UV + chlorine dioxide or UV + sodium hypochlorite: MiPRO photo. Highly effective for photosensitive compounds such as NDMA as well as low concentrations of contaminants in pure water. Ideal for reverse osmosis permeate and drinking water. Although the use of hydrogen peroxide in such cases is more typical, the use of hypochlorite is effective at low pH (for example, in reverse osmosis permeate when water is recycled).
• Ozone + Hydrogen Peroxide + Ultraviolet: MiPRO eco3 plus. It is most effective for water with a large number of pollutants and pathogens. Each technology enhances the effect of each previous one to achieve the most effective result.

Thus, the market is represented by three modifications:

• MiPRO eco3 - which includes an ozonation system, an H2O2 dosing unit, a reagent inlet / reaction chamber and a residual ozone destruction system;
  
• MiPRO photo - which includes the WEDECO UV disinfection system and the H2O2 dosing unit;
• MiPRO eco3 plus - which includes an ozonation system, an H2O2 dosing unit, a reagent inlet / reaction chamber, a residual ozone destruction system and a UV disinfection system.

The choice of AOR system for specific objects depends on the following factors:

• Type and concentration of organic compounds;
  
• Target concentrations for each pollutant of concern, including regulatory requirements and disposal methods;
• Main characteristics of treated waters, including parameters such as pH, TOC, COD, alkalinity, etc.;
• Operation before and after installation in a common process line, with a multi-barrier scheme often being the most economical solution;
• Energy costs and the cost of chemical reagents.