| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas-dissolved water supply system which inhibits or suppresses a decrease in the ozone concentration in a tank for receiving raw water and returned water from a use point and can therefore efficiently produce ozone gas-dissolved water of a high ozone concentration.SOLUTION: Unused ozone gas-dissolved water is returned to a tank 2 from a use point 11 through a pipe 12, and raw water is fed thereto through a pipe 1. The water in the tank 2 is sent to a gas dissolution apparatus 7 through the route of a pump 3, a heat exchanger 4, a filter 5, and a flow meter 6. The formed ozone water is sent to the use point 11. The surplus ozone gas flowing out of the gas dissolution apparatus 7 is sent to the headspace of the tank 2 through a purge gas pipe 13. |
