Provided are a device and a method for adjusting the number and size of air bubbles, more particularly, a device and a method for adjusting the number and size of air bubbles, capable of mixing a liquid and gas to form an air bubble mixture or air bubble water (water containing air bubble) and freely adjusting the number and size of air bubbles contained in the formed air bubble mixture to thereby be used in various fields.

A nano-bubble generator includes: (i) a housing defining: an inlet for receiving a liquid with entrained macro-bubbles: a first chamber operatively downstream of the inlet; a second chamber operatively downstream of the first chamber; and an outlet operatively downstream of the second chamber; (ii) at least one blade disposed within the first chamber for, in use, cutting macro-bubbles entrained in the liquid to convert such macro-bubbles into micro-bubbles; (iii) at least one first magnet within the second chamber; and (iv) at least one second magnet associated with the second chamber, wherein: (a) the at least one first magnet and the at least one second magnet are arranged such that the polarity of the at least one first magnet is opposed to the polarity of the at least one second magnet; and (b) the at least one first magnet is movable relative to the at least one second magnet.

A method and a generator for producing nanobubbles or nanodroplets at ambient conditions; the method comprising: providing a volume for accommodating a liquid; distributing a medium within the liquid, wherein the medium is provided to the volume at ambient conditions; generating an electric field using an electrode in the proximity of the volume for facilitating the generation of nanobubbles or nanodroplets; wherein the electrode and the liquid are not in direct electrical contact to prevent electrolysis occurring within the volume.

A method and a generator for producing nanobubbles or nanodroplets at ambient conditions; the method comprising: providing a volume for accommodating a liquid; distributing a medium within the liquid, wherein the medium is provided to the volume at ambient conditions; generating an electric field using an electrode in the proximity of the volume for facilitating the generation of nanobubbles or nanodroplets; wherein the electrode and the liquid are not in direct electrical contact to prevent electrolysis occurring within the volume.

A bubble generation device includes: a metallic narrow tube (10) through which water passes; and a pump that pressure-feeds the water containing a gas component into the metallic narrow tube (10). A drawer (11) in which a path through which the water passes is narrower than the front and the rear thereof in the flow direction of the water is disposed on the inside of the metallic narrow tube (10). The drawer (11) has the rectangular cross section orthogonal to the flow direction. The gas component contained in the water is dissolved in the water by pressure-feeding the water to the drawer (11), bubbles are evolved due to a decrease in pressure in the drawer (11), turbulent flow is generated in the water in the drawer (11) to crush bubbles in the water by the shearing force thereof, and bubbles are crushed by a shock wave caused by transonic flow occurring in the water that has exited from the drawer (11).

A reaction device for reacting a liquid-phase reactant and a gas-phase reactant converted into fine bubbles includes: a porous body that includes a plurality of flow paths and in which the flow paths are separated by porous walls, the porous walls include continuous pores, and the porous body includes a reaction catalyst at least on the surface thereof; a solution supply section for supplying a solution containing a gas-phase reactant and a liquid-phase reactant to the continuous pores in the porous body; and a solution discharge section for discharging solution containing a reaction product obtained when the solution flows through the continuous pores of the porous body.

A reaction device for reacting a liquid-phase reactant and a gas-phase reactant converted into fine bubbles includes: a porous body that includes a plurality of flow paths and in which the flow paths are separated by porous walls, the porous walls include continuous pores, and the porous body includes a reaction catalyst at least on the surface thereof; a solution supply section for supplying a solution containing a gas-phase reactant and a liquid-phase reactant to the continuous pores in the porous body; and a solution discharge section for discharging solution containing a reaction product obtained when the solution flows through the continuous pores of the porous body.

The present disclosure relates to a system and method for treating wastewater, the method comprising the steps of: providing a vessel for receiving wastewater and a gas, wherein the gas comprises one or more constituent gas components; directing the wastewater and a first gas component of the gas to the vessel; reducing the temperature of the contents of the vessel from a first temperature to a second temperature to facilitate the formation of clathrate hydrates comprising the wastewater and the first gas component; increasing the temperature of the contents of the vessel with respect to the second temperature to facilitate melting of the clathrate hydrates; and removing clean water and/or the first gas component from the vessel.

Provided is an ultrafine bubble generating apparatus capable, when generating nanobubbles in a liquid, of appropriately mixing a gas into a liquid ejected from a liquid ejector. The ultrafine bubble generating apparatus includes a liquid ejector for ejecting a liquid, a gas mixer for pressurizing and mixing a gas into the liquid ejected from the liquid ejector, and an ultrafine bubble generator for generating nanobubbles in the liquid by passing the liquid with intermixed gas therethrough. Between the liquid ejector and the ultrafine bubble generator, the gas mixer pressurizes and mixes the gas into the liquid, which is flowing in a pressurized state toward the ultrafine bubble generator.

Provided is an ultrafine bubble generating apparatus capable, when generating nanobubbles in a liquid, of appropriately mixing a gas into a liquid ejected from a liquid ejector. The ultrafine bubble generating apparatus includes a liquid ejector for ejecting a liquid, a gas mixer for pressurizing and mixing a gas into the liquid ejected from the liquid ejector, and an ultrafine bubble generator for generating nanobubbles in the liquid by passing the liquid with intermixed gas therethrough. Between the liquid ejector and the ultrafine bubble generator, the gas mixer pressurizes and mixes the gas into the liquid, which is flowing in a pressurized state toward the ultrafine bubble generator.