Report No DWI0776

INFLUENCE OF UV DISINFECTION ON BY-PRODUCT FORMATION AND THE OPERATIONAL IMPLICATIONS

Final Report to the Drinking Water Inspectorate

DWI0776

Sept 1997

SUMMARY

EXECUTIVE SUMMARY

This report details the findings of investigations into the influence of UV disinfection on the formation of disinfection by-products. These investigations were carried out on behalf of the Drinking Water Inspectorate as part of the DoE contract 'Disinfection by-products from drinking water treatment' (DWI 7(A2\32).

The study did not highlight any widespread problems likely to be associated with the use of UV disinfection. The detailed findings can be summarised as follows:

While the purpose of paramount importance in the use of UV disinfection is to achieve adequate disinfection, the formation of by-products may, in some circumstances, influence the mode of operation. A number of potential implications for the operation of UV disinfection systems are identified and these can be summarised as follows:

Copies of this report may be available as an Acrobat pdf download under the 'Pre 2000 Reports' heading on the DWI website.