COD - Elimination in UV units

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

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 will lead to a homolytic formation of OH radicals:

                    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).

Lamps and reactors need to have a special design for this process, otherwise the reaction will  quickly go into inhibition. The enviolet reactors are specially designed for highest efficiency in strongly absorbing aqueous solutions.

The 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.