| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment method in which when emulsified oil is removed from the water to be treated, an optimum amount of ozone is used so that the labor, time and cost to be taken for producing ozone can be reduced.SOLUTION: The water treatment method comprises a step of introducing ozone-containing micro- and nanobubbles into the water, which is to be treated and contains at least oil content, to flocculate the emulsified oil in the water to be treated so that the flocculated emulsified oil is floated/separated as scum. Since the ozone concentration of the ozone-containing micro- and nanobubbles to be introduced is 30 g/mN or higher, when the emulsified oil is removed from the water to be treated, the optimum amount of ozone can be used and the labor, time and cost to be taken for producing ozone can be reduced.SELECTED DRAWING: Figure 1 |
