A submersible aeration apparatus includes an air passage formed on a pump chamber to draw air into the pump chamber. A suction port formed on a lower side of the pump chamber draws liquid into the pump chamber. An impeller draws air through the air passage and liquid through the suction port. An ejection passage ejects the air and liquid. The impeller includes a main plate portion to cover a connection port connecting the air passage to the pump chamber. A vane portion protrudes downward from a lower surface of the main plate portion on the suction port side. The main plate portion has a cut-out part connecting the air passage and the pump chamber, and a groove part recessed from an upper surface of the main plate portion toward the lower surface and extending from an inner peripheral side toward an outer peripheral side of the main plate portion.

A submersible aeration equipment (10) for wastewater treatment in which partial vacuum is generated by the rotation of the impellers (22) within the water, which results in the formation of micro-bubbles. The submersible aeration equipment (10) includes a spring-based air intake valve (18) that can control the flow of air through a hollow shaft (12), wherein the opening of the spring-based air intake valve (18) is based on the amount of vacuum in the hollow shaft (12).

A modular system for aeration and biosource augmentation of a body of water and a method of using the system to prevent or eliminate an algal bloom in a water body include one or more mechanical basins located outside the body of water and at least two of: one or more residence pods submerged in the body of water that aerate the body of water, dose beneficial biosource, host biosource, and provide biosource to the body of water; one or more residence air pods submerged in the body of water that aerate the body of water, host beneficial bacteria, and provide beneficial bacteria to the body of water; and one or more residence nano pods submerged in the body of water that host, the one or more residence pods or the one or more residence air pods in fluid communication with the one or more mechanical basins.

A modular system for aeration and biosource augmentation of a body of water and a method of using the system to prevent or eliminate an algal bloom in a water body include one or more mechanical basins located outside the body of water and at least two of: one or more residence pods submerged in the body of water that aerate the body of water, dose beneficial biosource, host biosource, and provide biosource to the body of water; one or more residence air pods submerged in the body of water that aerate the body of water, host beneficial bacteria, and provide beneficial bacteria to the body of water; and one or more residence nano pods submerged in the body of water that host, the one or more residence pods or the one or more residence air pods in fluid communication with the one or more mechanical basins.

A submersible aeration equipment (10) for wastewater treatment in which partial vacuum is generated by the rotation of the impellers (22) within the water, which results in the formation of micro-bubbles. The submersible aeration equipment (10) includes a spring-based air intake valve (18) that can control the flow of air through a hollow shaft (12), wherein the opening of the spring-based air intake valve (18) is based on the amount of vacuum in the hollow shaft (12).

A mixing apparatus is disclosed for ponds and other shallow bodies of water. The apparatus uses air flow to entrain and move large volumes of water up and through the mixer. This movement of water creates a mixing of water from different depths within the body of water, and thus prevents, eliminates, or reduces stagnation of the water. The air flow is driven by one or more blowers, which may be mounted on the apparatus. The air from the blower is injected into the water about one to two feet below the surface. The air is injected through a series of relatively large holes positioned on opposed sides of tubing. The injected air creates water flow in sufficiently large volumes to mix the water within a shallow body of water of moderate size.

A mixing apparatus is disclosed for ponds and other shallow bodies of water. The apparatus uses air flow to entrain and move large volumes of water up and through the mixer. This movement of water creates a mixing of water from different depths within the body of water, and thus prevents, eliminates, or reduces stagnation of the water. The air flow is driven by one or more blowers, which may be mounted on the apparatus. The air from the blower is injected into the water about one to two feet below the surface. The air is injected through a series of relatively large holes positioned on opposed sides of tubing. The injected air creates water flow in sufficiently large volumes to mix the water within a shallow body of water of moderate size.

An aerator for adding oxygen to a body of water. A pair of tubes is mounted to a plate, in turn, connected to a pair of floats suspending the aerator in the body of water. A source of pressurized air directs air flow through the tubes forcing water flow into the tubes and out vertical risers whereat the oxygenated water then falls back onto the body of water.

An aerator for adding oxygen to a body of water. A pair of tubes is mounted to a plate, in turn, connected to a pair of floats suspending the aerator in the body of water. A source of pressurized air directs air flow through the tubes forcing water flow into the tubes and out vertical risers whereat the oxygenated water then falls back onto the body of water.

A method for producing stabilized, gas-infused liquids containing ultra high concentrations of infused gas, includes steps of: generating a gas-infused liquid in a sealed vessel under a high pressure of at least 20 psi; stabilizing the gas-infused liquid by passing the liquid while still under the high pressure through a tubular flow path arrangement which compresses the infused gas into nano bubbles in the liquid; infusing an additional amount of the gas into the stabilized liquid by injecting the same, while still under high pressure, back into the sealed pressure vessel along with more of the gas; and again stabilizing the liquid by again passing liquid, while still under the high pressure, through the tubular flow path arrangement to thereby form the additional amount of infused gas into nano bubbles in the liquid.