Photo-Fenton-Reactions

Another possibility of the UV-induced degradation process is the use of metal ions as catalyst, which, depending on the treatment objective and wastewater ingredients, may lead to a better process efficiency. The best known process is the Photo-Fenton-Process, at which iron-containing solutions are used as catalyst. On the basis of various photo reactions hydroxyl-radicals are generated via the photo reduction of the metal ions and initiate the above described degradation process. In addition, many other reactions play a role and also resulting to the degradation of organic water ingredients.

By means of an intra-complex charge-transfer-reaction above described photo-reactions are very effective in good applications. Many reactions which are happening parallel or in sequences play important roles in the Photo-Fenton-Reaction as they  also lead to the oxidation of the target(s). The Photo-Fenton-Reaction shows many advantages in comparison with the classical Fenton-Reaction:

- Degradation in the Photo-Fenton-Reaction is many times higher, as the calssical Fenton-Reactions moves into selve cavenging by the increasing sludge volume.

- Operational cost of the Photo-Fenton-Process are signifficantly lower as the chemical consumptions are lower.

- Photo-Fenton-Process leads to irrelevant formation od sludge. Classical Fenton shows high deposition costs and investment for remooving sludge.