NIRAS - Aurélie

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The spa will be built in Christianshavn in Copenhagen. The owner of this future spa already proposes massage, relaxing baths and Japanese baths. For the disinfection system, chlorination would like to be avoided because of health problems reported. Indeed, an indoor chemical pollutant is suspected to trigger asthma. But chlorination is still widely used especially in Denmark where the majority of swimming pools used chlorine.

The disinfection of the water is required because of the micro-organisms present that can make us ill. These micro-organisms come from the water itself and also from the swimmers: every swimmer adds 1.000.000 to of micro-organisms when entering the pool. These pollutants result from saliva, excretion products, swimwear, skin tissue, sebum, sweat, hairs, cosmetics… In a spa pool there are more difficulties for disinfection than a swimming pool. Indeed, spa pools are much smaller, have a higher ratio of bathers to water volume and thus the amount of organic material is far higher than in swimming pool water. Furthermore, the temperature is in general higher in spa pools.  That is why water disinfection is a key control measure.

The disinfectants used must meet certain demands: they should be harmless, non-irritating, active in small concentrations, remain their activity for a long time, active in the pool itself, easily to measure and safe to use.



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Started by NIRAS supervisor Sergio Fox on 27th March 2006.