Provided is a method for manufacturing a microbicide having high microbicidal performance for eradicating microbes. This method for manufacturing a microbicide comprises: a step for preparing an inorganic aqueous solution containing an inorganic component having seawater as a raw material thereof, an ozone mixing step for mixing ozone into the inorganic aqueous solution, and a stirring step for stirring the inorganic aqueous solution mixed with ozone and passing through a bubble generation nozzle; wherein, the temperature of the inorganic aqueous solution in the ozone mixing step and the stirring step is 0° C. to 30° C., and when the amount of inorganic aqueous solution treated in the ozone mixing step and the stirring step is defined as X liters and the treatment rate of the ozone mixing step and the stirring step is defined as Y liters/minute, then the microbicide is manufactured by alternately repeating the ozone mixing step and the stirring step for A.Math.X/Y minutes (where A is 30 or more).

An aquaculture environment control system comprising a plurality of discharge conduits positioned in a vessel, the discharge conduits including one or more orifices; a fluid source in fluid communication with the plurality of discharge conduits; a gas supply source in fluid communication with at least one of the plurality of discharge conduits; wherein discharging fluid from the plurality of discharge conduits into the vessel creates or maintains a current throughout fluid present within the vessel. A method of controlling an aquaculture environment comprising supplying one or more of a fluid and a gas to a plurality of discharge conduits positioned in a vessel; and discharging the one or more of the fluid and the gas from at least one of the plurality of discharge conduits to the vessel, the discharging creating or maintaining a current within the vessel.

Embodiments of the present disclosure describe an aquaculture environment control system comprising one or more control apparatuses positioned within a vessel at an angle relative to a proximal vessel wall and configured for scouring of the vessel, wherein each control apparatus has a discharge conduit and each discharge conduit has one or more orifices; and a fluid source in fluid communication with each of the control apparatuses. Embodiments of the present disclosure describe a method of controlling an aquaculture environment comprising supplying one or more of a fluid and gas to a control apparatus positioned within a vessel at an angle relative to a proximal vessel wall; and discharging one or more of the fluid and gas from the control apparatus at a fluid velocity sufficient for scouring of the vessel.

A production apparatus for a liquid containing gas bubbles includes a casing, a pump unit, and a gas bubble-mixing unit. The casing is provided with a main flow channel for a liquid, the main flow channel having a liquid inflow port and a liquid outflow port. The pump unit is disposed in the main flow channel and pumps the liquid to the liquid outflow port from the liquid inflow port. The gas bubble-mixing unit includes a first choke portion that is disposed in the main flow channel and has an inner diameter decreased and a gas supply channel that supplies the first choke portion with a gas.

The confined plunging liquid jet reactor with energy recovery includes a downcomer having an upper end, an open lower end, and a gas inlet for receiving gas, the downcomer extending into a liquid reservoir in a tank. A nozzle is mounted on the upper end of the downcomer for receiving a pressurized liquid to generate a liquid jet. The liquid jet impinges on liquid contained within the downcomer, creating turbulence and bubbles to entrain gas introduced through the gas inlet into the liquid reservoir as the jet travels downward in the downcomer. A riser is disposed around the downcomer and defines an annular air lift column. Unentrained gas and liquid exiting the downcomer rises in the air lift column with significant energy, the upper end of the riser being connected to a turbine coupled to a generator to recover energy from the air lift column.

In one configuration, a hydroponic system for enriching a liquid with gas-bubbles is disclosed. The system may include at least one reservoir configured to temporarily store the gas-bubble enriched liquid. Each of the at least one reservoir may include an associated inlet port and an associated outlet port fluidically coupled with each other via a liquid-flow line. The system includes one or more pumps configured to cause movement of the liquid along the liquid-flow line, a gas supply feeding a gas (in one configuration, oxygen from a gas concentrator), and a gas-bubble generator provided on the liquid-flow line. The gas-bubble generator may be fluidically coupled to the gas supply to receive gas from the gas supply. The gas-bubble generator may be configured to generate a plurality of individual gas-bubbles of the gas received from the gas supply and mix with the liquid stream flowing via the gas-bubble generator.

Various implementations include an aeration device. The aeration device includes a venturi tube and an outlet tube. The venturi tube has an outlet port and an air intake port. The outlet tube has a first end coupled to the outlet port of the venturi tube, a second end opposite and spaced apart from the first end, and an intermediate portion disposed between the first and second ends of the outlet tube. The intermediate portion is helically shaped and extends around a helical axis of the intermediate portion. The intermediate portion extends at least one rotation about the helical axis.

A bubble generation device is provided which is capable of discharging bubbles of about the same size from each of a plurality of bubble discharge ports. The device is provided with a bubble discharge chamber communicating with each of a plurality of bubble discharge ports, a turnaround path including a first communication port communicating with a gas storage chamber and a second communication port communicating with the bubble discharge chamber on a downstream side in a gas traveling direction of a turn-around point of the turnaround path, opening areas of the plurality of bubble discharge ports being the same as each other, and a total of the opening areas of the plurality of bubble discharge ports being smaller than an opening area of the second communication port.

An aeration apparatus for aerating water discharged from a hydraulic turbine includes: a manifold disposed within a crown of a runner of the hydraulic turbine; a plurality of radial pipes extending radially from an outer perimeter of the manifold and in fluid communication with the manifold; and one or more air injectors having a first end disposed within an aeration pipe, each of the one or more air injectors having a second end extending into a nozzle at a first end of one of the radial pipes. Rotation of the aeration apparatus resulting from rotation of the runner causes pumping of water from the manifold through the radial pipes past the one or more air injectors, and water flowing past the one or more air injectors causes air to become entrained in the water. The radial pipes discharge the water and entrained air from the aeration apparatus.

In one configuration, a system for enriching a liquid with gas-bubbles is disclosed. The system may include at least one reservoir configured to temporarily store the gas-bubble enriched liquid. Each of the at least one reservoir may include an associated inlet port and an associated outlet port fluidically coupled with each other via a liquid-flow line. The system includes one or more pumps configured to cause movement of the liquid along the liquid-flow line, a gas supply feeding a gas (in one configuration, oxygen from a gas concentrator), and a gas-bubble generator provided on the liquid-flow line. The gas-bubble generator may be fluidically coupled to the gas supply to receive gas from the gas supply. The gas-bubble generator may be configured to generate a plurality of individual gas-bubbles of the gas received from the gas supply and mix with the liquid stream flowing via the gas-bubble generator.