CO₂ in swimming pools

With the use of sodium bleach for the disinfection of swimming pool water is an acid needed to maintain the pH-value. CO₂ is for this the perfect product by its chemical properties and low cost.

Applications

Swimming Pool Water is an ideal breeding ground for bacteria and fungi because of the elevated temperature. That is why it is an absolute necessity to provide a disinfection installation. The most commonly used disinfectant for this application is sodium bleach.

In the event of a too acidic pH (< 5) the hydrogen hypochlorite or hypochlorous acid is converted into the toxic chlorine. For optimum operation of the hypochlorite, it is therefore important that the pH of the pool water is maintained between 6.5 and 7.

Why has the pH of swimming pool water the tendency to move to previous alkalinity (pH > 7)? By sweat, soap residues or possibly urine the pH of the water will rise. In addition, the used chlorine bleach is alkaline by the presence of sodium hydroxide (11<pH<14). Therefore, an acid must be added to again achieve the ideal disinfection area of the hydrogen hypochlorite. CO₂ is a very suitable product for this.

CO₂ can be used in any swimming pool where the disinfection is done with chlorine bleach.

Requirements

• CO₂-framework, sphere or tank
• evaporator
• line pressure regulator
• pH-metre
• CO₂-injector, controlled by a pH-metre

The gaseous CO₂ is dosed in the swimming pool water pipe between the pump and heat exchanger.

For decades, IJsfabriek Strombeek has been a point of reference in the field of CO₂. In addition to the required CO₂ we can also provide all equipment. Our team of engineers are ready with all their experience and expertise to help you organise your project.

Advantages

• CO₂ is a weak acid. The risk of a too strong acidification (pH<5) is much smaller than with use of strong acids such as HCl, avoiding formation of the highly toxic chlorine gas.
• Easy and safe to dose.
• Cost-effective in comparison with other acids.

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