Design of pool disinfection system

Ozone system CT value

“C” represents the ozone concentration whose unit of measurement is “mg/L”; “T” represents the contact time whose unit of measurement is “min”; CT value expressses disinfection validity. For example, the ozone concentration is 0.4mg/L, the contact time is 4min, and the CT value is 1.6. The features of swimming pool water are as following:

⑴ The water is of closed circulation, at least 4 times one day.

⑵ Needed oxidant is increasing with the increasing of swimmers.

⑶ The regular temperature of the water is between 5℃ and 40℃.

⑷ Chlorine is needed to be the assistant disinfector.

The swimming pool circulation water is disinfected with ozone after being filtered. That the CT value is 1.6 is safe for the swimming pool disinfection system. In some areas CT value is taken as 0.8, ozone concentration 0.2mg/L～0.25mg/L and contact time 3.5min～4min, when the amount of chlorine, the assistant disinfectant, is reduced to 65%. When chlorine is a primary disinfectant and ozone fine treatment disinfectant, CT value can be less than 0.8, ozone concentration less than 0.5mg/L and contact time less than 1min.
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