UV Disinfection a Safer Choice for Pools According to US Study

Hanovia UV systems reduce exposure to harmful chemical disinfection byproducts

A study published by Environmental Science & Technology* magazine in the USA has found that the chemicals commonly used to disinfect pool water can pose serious health risks for swimmers.

A mother and baby in a swimming pool treated with Hanovia UV

A mother and baby in a swimming pool treated with Hanovia UV

Photo: http://www.halmapr.com/hanovia/AC_Baths_pool_1.jpg (735 KB)
(Photo caption: A mother and baby in a UV-treated pool)

The study, conducted by researchers at the University of Illinois, shows that exposure to byproducts of chemical disinfection can cause early ageing, birth defects, asthma and bladder cancer. The findings suggest that the best method of pool disinfection is a combination of ultraviolet (UV) treatment and chlorine, rather than the traditional method of chlorine treatment alone.

Hanovia offers a safer method of non-chemical pool water disinfection with its UV systems.  Water circulating through the pool is exposed to a specific spectrum of UV light, which is absorbed by microorganisms’ DNA, resulting in permanent, irreparable inactivation of the microorganism.

In addition, UV light initiates photo-chemical and photo-oxidation reactions that destroy chloramines, the byproducts of chlorine disinfection.  This reduces the associated health risks along with unpleasant odours, eye and skin irritation, and corrosion to pool hall structures.

Chlorine is still required for residual disinfection, but pools using a UV system require up to 90% less chlorine than pools without UV.

Hanovia systems monitor and adjust UV lamp output to appropriate levels, while automatic wipers keep the quartz sleeves surrounding the UV lamps clean and power switching ensures UV output varies according to demand, ensuring optimum performance at all times.

The systems are compact and can usually be installed within existing pipework. The only regular maintenance is an annual service at which the lamp is changed.

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