Water companies see the UV light on sewage disinfection

Water companies are displaying great interest in ultra-violet (UV) sewage disinfection as trials are showing that it can be an economical and effective method of ensuring compliance with EC bathing water standards. UV technology is the only system which is both financially attractive and consented for long-term use by the National Rivers Authority (NRA).

The outlook for sewage disinfection has changed radically in recent years. In 1986, a review for the Department of the Environment (DoE) by Consultants in Environmental Sciences (CES) concluded that it would be mainly an interim method of achieving compliance with the 1976 EC Directive on bathing water (ENDS Report 178, pp 6-7).

But at a Water Research Centre (WRc) seminar in September, it was apparent that sewage disinfection is here to

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