Advanced Oxidation Processes (AOP)

Elimination of Active Substances by advanced oxidation technology

UV-oxidation, Photo-oxidation, Photo-Fenton or Photo-combined advanced oxidation processes for selective degradation.

Advanced Oxidation Processes are known to eliminate all type of substances. For better economic properties Enviolet have developed special AOPs, to selectively destroy active substances (e.g. Active Pharmaceutical Ingredients, Pharmaceutically Active Compounds) dependant of the matrix. These substances can be toxic or undesired for various reasons.

The elimination of Pharmaceutically Active Compounds (PhAPs) have to be removed now in many countries below PNEC.

Enviolet UV-oxidation is very suitable and an approved advanced oxidation process for elimination of Pharmaceutically Active Compounds.

We have already treated solutions containing the following substances:

  • cyanides or organo-cyanides
  • aromatics, like benzene, phenol, toluene, PAH, biphenyl, and substitued products of these compounds
  • aminopolycarboxylates, like EDTA, DTPA, ...
  • phosphonates, herbizides on the base of phosphonates
  • active pharmaceutical substances (API) like hormones, cytostatics, atibiotics, ...
  • heterocyclics, like 1,4-dioxan, tetrahydrothiophene, ...
  • complex Structures, like pantopranzol, urapidil, ...

A dedeicated list of API treated with Enviolet APOs you find here.

Usually, the wastewater will be bioavailable after the uv-oxidation, or the bioavailability will at the least be strongly increased, or toxicity removed by photo-oxidation of toxic structures.

Destruction of 1,4-Dioxan in industrial wastewater

Enviolet has extensive experience with the removal of 1,4-dioxane in industrial wastewater:

Flow rates:
Smallest project: 6 m³/d
Largest project: 300 m³/day

Initial concentrations of 1,4-dioxane and wastewater matrix:
Highest concentration treated to date: 70 g/L 1,4-dioxane (treatment target: < 5 mg/L)
Typical range of 1,4-dioxane concentration: 500 mg/L ... 3 g/L.
The COD values of the wastewater were between a few g/L < COD < 50 g/L: In addition to the degradation of 1,4-dioxane, our plants also increase the biodegradability of the treated medium.

Treatment targets:
The treatment targets depend on the customer's specification and typically vary between 0.1 µg/L and several mg/L.