Creating solutions in collaboration Annual report 2013

Ensuring clean drinking water with UV radiation and hydrogen peroxide  

Good process control makes advanced oxidation a robust treatment technique

15 February 2013BTO

Water companies employ various techniques to remove substances from raw water during the production of drinking water. Besides, they naturally want to prevent undesirable substances from appearing because of the treatment process. For this reason, the treatment techniques used in the production of drinking water are closely controlled.

UV is a robust technique for drinking water production

In 2013, KWR is conducting research, within the framework of the water sector’s joint research programme (BTO), into the occurrence of by-products resulting from treating water using UV radiation and hydrogen peroxide – so-called advanced oxidation. This technique is chiefly used to remove organic micropollutants, such as pharmaceutical residues. Previous research had demonstrated that such treatment can result in the appearance of by-products which, under specific circumstances, could be mutagenic. Researchers want to know whether and how the appearance of such by-products can be prevented. Fewer by-products seem to appear when nitrate and/or natural organic material is removed beforehand, or when the UV lamp is adjusted – e.g., with filters – in such a way as to avoid certain wave lengths. Advanced oxidation is then very suitable.

UV reactor

UV reactor

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