An object of the present disclosure is to improve the generation efficiency of a UFB-contained liquid in a generation apparatus having a circulation mechanism. One embodiment of the present invention is an ultra fine bubble generation apparatus including: a first tank that stores a liquid; a generation unit configured to generate an ultra fine bubble in the liquid output from the first tank; a second tank that stores the liquid output from the generation unit; and a liquid passage that inputs again the liquid stored in the second tank to the first tank, and the ultra fine bubble generation apparatus includes a blocking configuration that blocks an ultra fine bubble included in the stored liquid from being input again to the first tank.

A method for manufacturing beverage or other liquid containing bubbles uses a system for manufacturing bubble-containing liquid that includes: a bubble generating unit that generates fine bubbles in a liquid; a bubble collapsing unit that is connected to the bubble generating unit to collapse the fine bubbles contained in the bubble-containing liquid supplied from the bubble generating unit by making the bubble-containing liquid pass through the bubble collapsing unit and irradiating the bubble-containing liquid with ultrasonic wave; and a storage unit that is connected to the bubble collapsing unit to store the bubble-containing liquid supplied from the bubble collapsing unit. The method includes: a bubble generating step of generating the fine bubbles in the liquid by the bubble generating unit; a bubble collapsing step of generating superfine bubbles by forming an ultrasonic field by the bubble collapsing unit to collapse the fine bubbles contained in the liquid; and a storage step of storing the bubble-containing liquid containing the superfine bubbles by the storage unit. Consequently, beverage or other liquid containing the superfine bubbles can be manufactured.

Provided is an ultrafine bubble generating method and an ultrafine bubble generating apparatus capable of efficiently generating a UFB-containing liquid with high purity. To this end, a flow passage inner volume is varied by using a flow passage inner volume varying element, the liquid is pressurized such that the liquid passes through a narrow portion at high speed and flows into a depressurizing area.

The present invention provides a fine bubble generating apparatus capable of generating fine bubbles efficiently. The present invention includes a fluid flow passage that includes a narrow portion in at least a part thereof, a heating part capable of heating a liquid flowing through the fluid flow passage, and a controlling unit that controls the heating part. The controlling unit controls the heating part to generate film boiling in the liquid to generate ultrafine bubbles.

Systems, devices, and methods are presented for optimizing the formation of gas nanobubbles in a disinfecting solution. In an example system for treating contaminated water, a centrifugal pump draws the water from a reservoir and circulates the water in and through a circuit of elements including a mixing chamber in the pump, a pressure vessel, a backflow valve, a Venturi injector, and a pair of nozzles immersed in the reservoir. The system injects ozone-rich gas into the fluid to produce an aqueous solution containing a volume of gas nanobubbles. The nozzles release the gas nanobubbles into the reservoir, creating highly reactive compounds that destroy organic compounds and other contaminants in the water.

The apparatus includes: a producing unit that generates ultrafine bubbles in a liquid supplied from a liquid introducing unit to produce an ultrafine bubble-containing liquid containing the ultrafine bubbles, and delivers the ultrafine bubble-containing liquid; a liquid delivering unit that delivers the ultrafine bubble-containing liquid to an outside; a buffer tank that receives the liquid delivered from the producing unit and delivers the liquid to the liquid delivering unit; and a controller that controls the delivery of the ultrafine bubble-containing liquid from the buffer tank to the liquid delivering unit such that, if the producing unit stops operating, an ultrafine bubble-containing liquid accumulated in the buffer tank is delivered to the liquid delivering unit to enable the liquid delivering unit to deliver the ultrafine bubble-containing liquid to the outside.

Ultrafine bubbles with a diameter of less than 1.0 μm are generated in liquid by causing film boiling in liquid by means of a heater.

An ultrafine bubble generating apparatus and an ultrafine bubble generating method capable of efficiently generating an ultrafine bubble-containing liquid with high purity are provided. In order to this, a heating element provided in a liquid is caused to generate heat, and film boiling is made on an interface between the liquid and the heating element. A film boiling bubble is generated by the film boiling, and ultrafine bubbles are thus generated near the film boiling bubble.

In order to efficiently produce a liquid containing ultrafine bubbles of a desired gas, an ultrafine bubble-containing liquid producing apparatus includes a gas dissolving unit that dissolves a predetermined gas into a liquid, and a UFB generating unit that generates ultrafine bubbles in the liquid in which the predetermined gas is dissolved. A CPU performs control under a first condition in a case of causing the gas dissolving unit to operate in a circulation route passing through the dissolving unit. The CPU performs control under a second condition different from the first condition in a case of causing the UFB generating unit to operate in a circulation route passing through the UFB generating unit.

In order to efficiently produce a liquid containing ultrafine bubbles of a desired gas, an ultrafine bubble-containing liquid producing apparatus includes a gas dissolving unit that dissolves a predetermined gas into a liquid, and a UFB generating unit that generates ultrafine bubbles in the liquid in which the predetermined gas is dissolved. A CPU performs control under a first condition in a case of causing the gas dissolving unit to operate in a circulation route passing through the dissolving unit. The CPU performs control under a second condition different from the first condition in a case of causing the UFB generating unit to operate in a circulation route passing through the UFB generating unit.