UV Applications > Swimming pool
Does the heavy smell from the pool disinfectant indicate cleanliness and sanitation?
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When it comes to disinfecting water, it is natural to think of the chlorination disinfection commonly used in swimming pools. Indeed, chlorine is the smell! "Swimming pool water quality standard CJ/T 244-2016": free residual chlorine limit requirement is 0.3-1.0mg/L. Theoretically, the residual chlorine concentration is already very low, so low that we cannot smell it. Therefore, a heavy smell from the pool disinfectant is not necessarily indicative of cleanliness and sanitation!
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Source of the disinfecting water’s smell
Chlorine reacts with ammonia, nitrogen and organic compounds in water to form a disinfectant by-product—most of which is chloramine. Chloramine is extremely volatile and easily floats into the air from the water, so the pool is often flooded with the “pool disinfectant smell.”
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Source of ammonia, nitrogen, and organic compounds
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Urea
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Sweat, Saliva
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Hair
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How to resolve the harm of disinfectant by-products?
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Technical University of Denmark and the University of Heidelberg in Germany have confirmed through experiment that medium-pressure UV technology is very effective in the decomposition of chloramines, and it can effectively promote the decomposition of chloramine by photooxidation.
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The absorption rate of different chlorine in different valence states: the optimal decomposition wavelength of monochloramine in the UVC segment, the optimal decomposition wavelength of dichloramine in the UVB segment, and the optimal decomposition wavelength of trichloramine in the UVA segment.
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The low-pressure ultraviolet lamp has a single wavelength and only covers the UVC band. The decomposition effect of chloramine is not good; there is a phenomenon of photoreactivation, some bacteria are revived under visible light irradiation, and sterilization is not complete.
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The medium-pressure UV lamp covers UVA, UVB, UVC, and has the ability to decompose chlorine, prevent light resurrection, and disinfect completely.
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1.Truly achieving thorough disinfection
Low-pressure ultraviolet rays prevent the regeneration of germs by destroying its DNA, but some bacteria will resurrect under the radiation of visible light, which is called "light resurrection,” and is particularly damaging outdoors, resulting in incomplete sterilization. The medium-pressure ultraviolet broad-spectrum wave can eliminate light resurrection and truly achieve thorough disinfection.
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2. Scientific design assures disinfection dose
To kill the bacteria, the required UV dose must be accurately calculated, otherwise the effect of complete inactivation will not be achieved. Towin relies on the Toshiba Bio-inactivated Laboratory and calculation software in Japan and its scientific design to ensure effectiveness.
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3.Toshiba core lighting quality assurance
Towin is the exclusive agent of the internationally renowned brand Toshiba’s mediumpressure UV lamp, the core components of Toshiba products, sheet metal parts processing in the country, to ensure the high-end quality of the equipment while achieving a very high cost performance.
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Toshiba Medium Pressure UV Lamps
Polychromatic wavelength UV output to ensure an effective disinfection,and no photoreactivation.Made in Japan.
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Stainless Steel UV Reactor
Utilize CFD system to fully consider the hydrodynamics and inside polish treatment to enhance the disinfection efficiency.
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Automated Wiper Cleaning System
A automated wiper cleaning system to avoid quartz sleeve fouled to ensure the effective disinfection with proper UV intensity.
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UV Intensity Monitor
A UV monitor onboard is used to provide real time and auditable records of UV intensity.
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Temperature Sensor
A temperature sensor is installed to ensure a reliable&safe operation with alarm for high temp limited level and power cut off.
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Automated Control System
The control system provides stable power output,real time UV intensity monitor, and recorder of operation time and temperature.
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