A system and method for aerating and mixing wastewater that includes fine bubble diffusers located at least partially below a large bubble mixer. At least a portion of the gas discharged from the fine bubble diffusers is captured by the large bubble mixer and is reused by the large bubble mixer to form and release intermittent large bubbles. Prior to being captured by the large bubble mixer, the gas discharged by the fine bubble diffusers can aerate the wastewater. The large bubble mixer includes an accumulator that, upon becoming filled with gas, generates and releases a large bubble. Upon discharge from the large bubble mixer, the large bubbles generated therein may separate into a plurality of coarse bubbles for providing additional oxygen transfer and mixing of the wastewater. The system may include supply lines for supplying gas only to the fine bubble diffuser.

A chemical solution vaporization device includes a chemical solution tank including chemical solution vaporization rooms, a chemical solution sensing room, and a chemical solution supply room. A first internal wall separating the plurality of chemical solution vaporization rooms from each other includes a first opening at a lower portion thereof. A second internal wall separating at least one of the plurality of chemical solution vaporization rooms from the chemical solution supply room includes a second opening at a lower portion thereof. A third internal wall separating at least one of the plurality of chemical solution vaporization rooms from the chemical solution sensing room includes a third opening at a lower portion thereof. And a lower portion of a fourth internal wall separating the chemical solution sensing room from the chemical solution supply room is combined with the lower wall.

A gas sparger produces an intermittent flow of bubbles even if provided with a continuous gas flow. The sparger has a housing to collect a pocket of gas and a conduit to release some of the gas from the pocket when the pocket reaches a sufficient size. Optionally, a cover over an outlet from the conduit may break up or distribute the released gas. A large sparger for use with a commercial membrane module can comprise a plurality of smaller units.

A liquid-diffusing filter which can aerate a liquid by diffusing it and thus exposing it to air to oxygenate the liquid. The user can pour a liquid through the device and it comes out diffused. Thus a superior liquid aerating solution is provided that can more simply aerate a beverage.

Systems for use in one or more sludge or waste collection devices (e.g., containers, vessels or basins). One such system is a sludge removal system for removing sludge from one or more sludge collection devices. The sludge removal system includes one or more sludge removal grids disposed in one or more sludge collection devices. Each sludge removal grid preferably includes at least one header and a plurality of sludge collection laterals. Another such system includes a fluid distribution system for distributing one or more fluids in one or more sludge or waste collection devices. A movement restricting or prevention member is provided in both the fluid distribution and sludge removal systems to prevent or restrict movement of the sludge collection laterals and the fluid distribution laterals away from or towards a floor of a corresponding collection device without anchoring or fixing the laterals to the floor.

A hydrogen gas dissolution apparatus 1 to comprises a hydrogen extracting pipe 8 for extracting hydrogen gas from a cathode chamber 40b, a water supply pipe 3 for supplying water for electrolysis, an opening pipe 81 for opening the cathode chamber 40b, a hydrogen gas dissolution module 6 connected to the hydrogen extracting pipe 8, a first open/close valve 91 installed on the above-said water supply pipe 3, a second open/close valve 93 provided on the opening pipe 81, and a control means 10 for controlling the electrolysis tank 7, the first open/close valve 91, and the second open/close valve 93. The control means 10 causes the water to flow for the first and second open/close valves 91 and then start the electrolysis after closing the first open/close valve 91 and the second open/close valve 93.

A liquid aeration system includes an air compressor system and a diffuser. The air compressor system includes an air intake manifold, an air compressor, and a compressor inlet line. The compressor inlet line fluidly connects the air intake manifold and the suction inlet of the air compressor. The compressor suctions air from the air intake manifold through at least the suction inlet hose. The compressor compresses the air into compressed air that is supplied to the diffuser.

A bubble generator including a container having a side wall and a top wall defining a cavity. An insert is located within the cavity defining a gas path with a trap portion. The gas path being in communication with an exit in the container. The cavity including an opening receiving a gas accumulating within the cavity, the gas path allowing the accumulating gas to escape through the exit once the accumulating gas reaches a predetermined level proximate the trap portion.

A hydrogen gas dissolving apparatus 1 has a hydrogen supply unit 2 capable of supplying hydrogen gas, and a hydrogen gas dissolution module 6 for bringing the hydrogen gas supplied from the hydrogen supply unit 2 in contact with and dissolved in water. The hydrogen gas dissolution module 6 has a supply port 62 to which the hydrogen gas is supplied, a hydrogen chamber 63 communicating with the supply port 62 and filled with the hydrogen gas supplied from the supply port 62, and an exhaust port 64 communicating with the hydrogen chamber 63 and discharging the air in the hydrogen chamber 63. The exhaust port 64 is located in a lower part of the hydrogen chamber 63.

A method for aerating water in a treatment basin includes positioning at least one bridge above an upper surface of the water in the basin; providing a retrievable mounting frame assembly; securing a guide rail assembly to the bridge; transporting the mounting frame assembly on a transport device to a selected position on the walkway near the guide rail assembly; securing a transfer crane to the walkway proximate the guide rail assembly; transferring the mounting frame assembly from the transport device for connection to the a one guide rail assembly; connecting the mounting frame assembly to the guide rail assembly to provide a supply of air to the first air distribution conduit; moving the retrievable mounting frame assembly from a first position above the upper surface of the water to a second position below the water; and initiating a flow of air to the first air distribution conduit.