UV Systems to treat indoor pools and rainwater

Sistemas uv para el tratamiento de piscinas cubiertas y agua de lluvia

The Victoria Park Swimming Pool Complex (VPSPC) in Hong Kong has recently installed 21 Hanovia UV disinfection systems to treat the water in three of its indoor pools and to disinfect harvested rainwater. The UV systems were installed by Jardine Engineering Corp, with the help of SmarTech HVAC & Engineering, Hanovia’s local distributor.

The Victoria Park Swimming Pool Complex (VPSPC) in Hong Kong has a 50 metre competition pool, a 30 metre multipurpose pool and an indoor jacuzzi that all have Hanovia UV treatment systems. In addition, recycled rainwater used for cleaning floors and toilet flushing is treated with UV prior to use.

VPSPC chose Hanovia because, in their opinion, it is the ideal technology for swimming pool water treatment. UV not only destroys microorganisms but also removes chloramines, resulting in crystal clear water with no accompanying chlorine smell. Hanovia UV systems can also be sized to handle a huge variety of flow rates, from as high as 1700m3/hour in the main competition pool to the small flow rates required for rainwater treatment.

Chloramines, also known as combined chlorine, are the result of the combination of free chlorine, used to treat swimming pools, and contaminants in the water: bacteria, sun cream particles, oils and organic matter in general.
Chloramines lie as a vapour over the pool surface and cause eye and skin irritations. They have a strong odour which is unpleasant for both bathers and staff and they can also be a health risk if inhaled regularly.

Chloramines are also highly corrosive and are known to cause significant damage to the physical structures of some indoor pools, which can raise safety concerns. The use of UV technology eliminates the problem of chloramines almost entirely due to its wide wavelength spectrum, which destroys mono-, di- and tri-chloramines.

Article published in: FuturENVIRO November 2014