COD - Elimination in UV units

Enviolet will realize your UV-oxidation unit for COD / TOC- reduction and simultaneously increase the bioavailability of the treated wastewater. We do this by UV oxidation in combination with various oxidants under varying conditions in efficient processes of photo-oxidation.

By irradiating the oxidant with UV light, reactive intermediates are formed. These intermediates will react very quickly with the COD.

When using hydrogen peroxide as an oxidant, the irradiation with UV-light will lead to a homolytic formation of OH radicals (Photo-homolysis):

                    H2O2 -UV-> 2 OH*

OH radicals react very quickly with any organic compound through hydrogen abstraction. Mineral products such as water, sulphate, etc. result as final products (further information regarding chemistry of uv-oxidation).

UV-lamps and UV-reactors need to have a special design for this advanced oxidation process (AOP), otherwise the photo-reaction will  quickly go into inhibition, as it turn out to end in a photo-polymerization. The enviolet UV-reactors are specially designed for highest efficiency of UV-oxidation and phtoto-oxidation in strongly absorbing aqueous solutions, and many wastewaters we treat look in the beginning of the UV-oxidation like Coffee or Latte Macchiato.

The photo-reaction proceeds until the UV oxidation is complete and then the next process steps can follow to conclude the whole advanced oxidation process (AOP). 

Reduction of COD - Waste Water at High Volume Rates

A continuous treatment using UV-oxidation of higher volume rates raises several demands on UV-oxidation. Besides a high efficiency and low operational cost, the maximum space-time-yield is a decisive criterion for photo-oxidation processes.