To provide a deodorization/sterilization apparatus capable of generating and spraying high-concentration ozone water.

At the connection part of the circulation route of raw material water for ozone water generation in an ozone water generator 100' and the ozone water inflow pipe 201 of a spray 200' for spraying the ozone water, a switching valve 208 is disposed. By switching the switching valve 208, the ozone water generation processing of continuously repeating the circulation of supplying the raw material water from a water storage tank 10 to the ozone water generation part 100' and sending the generated ozone water again to the water storage tank 10 and the processing of spraying the ozone water of a fixed concentration inside the water storage tank 10 through the nozzle 205 of the spray 200' for spraying the ozone water are performed.

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