Treatment of swimming pool water, adds controlled quantity of ozone to side stream which is passed to reaction vessel and returned to main stream following adequate residence time

摘要

Preferably following filtration, an 8%-25% side stream (QT) of the water recirculated is branched off and treated with ozone. The stream is sent to a reaction vessel (5), where adequate residence time is allowed, before return to the main stream (QH). Preferred features: 10%-25% of the water is branched off for ozone addition. At the reaction vessel (5) outlet, the ozone excess is measured. Control of ozone dosing (11) assures that a set residual ozone content is not exceeded in the side stream. Ozone residual content must not be allowed to exceed 0.2-0.6 mg/l, preferably 0.25-0.5 mg/l. Side stream ozonization is continued without reduction overnight, and when bathing is reduced. Gaseous residual ozone and ballast air are led off from the reaction vessel through a venting plant (6), with absorption in an activated carbon filter (7).