A surface water treatment system may include a surface water source and an oxygen nanobubble device. The oxygen nanobubble device may include an air compressor configured to generate compressed air, an air dryer coupled downstream from the air compressor, and an oxygen concentrator coupled downstream from the air dryer. The oxygen nanobubble device may also include a recirculating surface water pump coupled to the surface water source. The oxygen nanobubble device may also include an oxygen nanobubble generator coupled downstream from the recirculating surface water pump and coupled to the oxygen concentrator to generate oxygen nanobubbles within the surface water.

One embodiment of the present disclosure is a manufacturing method for a liquid containing fine bubbles, comprising: a generation step of generating liquid droplets containing fine bubbles by atomizing a liquid through irradiation with an ultrasonic wave; and a recovery step of recovering the liquid droplets into a recovery container by using a recovery mechanism including the recovery container.

One embodiment of the present disclosure is a manufacturing method for a liquid containing fine bubbles, comprising: a generation step of generating liquid droplets containing fine bubbles by atomizing a liquid through irradiation with an ultrasonic wave; and a recovery step of recovering the liquid droplets into a recovery container by using a recovery mechanism including the recovery container.

An irrigation water treatment device may include a housing and an oxygen nanobubble generator carried by the housing and coupled downstream from an irrigation water supply for an irrigation area and having a first pressure. The irrigation water treatment device may include a solid-state oxygen concentrator carried by the housing and supplying an oxygen stream to the oxygen nanobubble generator at a second pressure higher than the first pressure. The irrigation water treatment device may also include a biological additive device carried by the housing for the irrigation water, and an irrigation water outlet carried by the housing and coupled downstream from the oxygen nanobubble generator.

An irrigation water treatment device may include a housing and an oxygen nanobubble generator carried by the housing and coupled downstream from an irrigation water supply for an irrigation area and having a first pressure. The irrigation water treatment device may include a solid-state oxygen concentrator carried by the housing and supplying an oxygen stream to the oxygen nanobubble generator at a second pressure higher than the first pressure. The irrigation water treatment device may also include a biological additive device carried by the housing for the irrigation water, and an irrigation water outlet carried by the housing and coupled downstream from the oxygen nanobubble generator.

The present invention provides positively or negatively charged nanobubbles, with the goal to clarify the effects of positively or negatively charged nanobubbles on microorganism and plant growth. The present invention also provides charged nanobubble dispersion liquid that contains 10.sup.5 to 10.sup.10 fine bubbles. The fine bubbles are dispersed in the liquid, are positively or negatively charged, have an average particle size of 10 nm to 500 nm, and have a zeta potential of 10 mV to 200 mV.

The present invention provides positively or negatively charged nanobubbles, with the goal to clarify the effects of positively or negatively charged nanobubbles on microorganism and plant growth. The present invention also provides charged nanobubble dispersion liquid that contains 10.sup.5 to 10.sup.10 fine bubbles. The fine bubbles are dispersed in the liquid, are positively or negatively charged, have an average particle size of 10 nm to 500 nm, and have a zeta potential of 10 mV to 200 mV.

A method for producing a liquid containing a high concentration of tiny bubbles comprises passing liquid from a first reservoir to a second reservoir via a nanobubble generator which produces a liquid containing a high concentration of tiny bubbles.

A method for producing a liquid containing a high concentration of tiny bubbles comprises passing liquid from a first reservoir to a second reservoir via a nanobubble generator which produces a liquid containing a high concentration of tiny bubbles.

A drinking water dispensing device may include a housing and a replaceable, drinking water supply bottle carried by the housing. The drinking water dispensing device may also include a drinking water pump carried by the housing and coupled to the replaceable, drinking water supply bottle for providing a drinking water supply stream having a first pressure, and a water-cooling device carried by the housing for cooling drinking water from the drinking water pump. The drinking water dispensing device may also include an oxygen nanobubble generator carried by the housing and coupled downstream from the water-cooling device. A solid-state oxygen concentrator may be carried by the housing for supplying an oxygen stream to the oxygen nanobubble generator at a second pressure higher than the first pressure. The drinking water dispensing device may also include a drinking water dispensing outlet carried by the housing and coupled downstream from the oxygen nanobubble generator.