Patent ID: 7276168

Claim:
A method for the supply of a constant-concentration ozonated water, comprising employing a unit for producing ozonated water by contact between an ozone-containing gas and water and a system for using the ozonated water produced by the unit at a place separated therefrom, said unit having an inlet for non-ozonated feed water, an ozonated water inlet, and an ozonated water outlet; interposing an ozonated water circulating line between the ozonated water inlet and the ozonated water outlet, the circulating line extending extending to a neighborhood of the place for using the ozonated water; causing an interior of the circulating line to circulate the ozonated water so that a flow rate may be constantly fixed at the ozonated water outlet of the ozonated water producing unit; monitoring an ozone concentration of the ozonated water in the neighborhood of the ozonated water outlet; adjusting an amount of the ozone containing gas supplied to the ozonated water producing unit and/or a concentration of the ozone containing gas based on results of the monitoring; further monitoring an amount of the ozonated water used at the place for using the ozonated water; and controlling an amount of the ozonated water to be produced based on the results of monitoring of the amount of ozonated water used.