An apparatus for aerating bodies of water includes a floating platform, a motor supported by the floating platform, a transmission which is coupled to the motor and whose output shaft is in the form of a hollow shaft, a fan for supplying air through an air supply line connected thereto, wherein the air supply line is connected to one end of the hollow shaft, a hollow stirring shaft coupled to the other end of the hollow shaft, an stirrer affixed to the free end of the approximately vertical stirring shaft, wherein the stirrer is designated as a hollow body and has a central opening through which air supplied by the stirring shaft can pass, and a multiplicity of air outlet openings.

A stirrer device, especially for the mixing of a fluid with at least one other fluid, includes at least one fluid dispersing unit able to turn about an axis of rotation, having at least one exit opening for at least one fluid discharge, and the stirrer device has at least one optimization unit, which in at least one operating state increases at least a differential pressure at the exit opening.

The invention relates to a mixing chamber in which a first liquid comes into contact with a second liquid, and a gas injection device designed to inject a gas into the mixing chamber, wherein the gas injection device comprises: a gas source to provide the gas at a predetermined pressure, and a metering unit to limit the gas provided by the gas source to a predetermined flow rate, wherein the metering unit is in contact with the mixing chamber on a gas outlet side of the metering unit, wherein the gas outlet side of the metering unit comprises an elongated gap, wherein the gas passes out of the metering unit into the mixing chamber via the elongated gap, and wherein the gas passes out of the metering unit into the mixing chamber.

An apparatus for preparing a liquid material containing microbubbles includes a dispensing nozzle and a first positive displacement gas pump. The dispensing nozzles includes a material mixing channel, a rotary gas diffuser positioned in the material mixing channel, and a rotary mixer positioned in the material mixing channel downstream of the rotary gas diffuser. The rotary gas diffuser and the rotary mixer rotate about a common axis of rotation. The first positive displacement pump has a first gas outlet opening to the material mixing channel, which is directed at an outer circumference of the rotary gas diffuser.

A hyperboloid agitator for circulating liquids, in particular water, wastewater or the like, in the centre of which a connection portion (2) for connection to a hollow agitator shaft (1) is provided, characterised in that the hyperboloid agitator is formed as a hollow body, with a central aperture (3) for supplying air being provided in the connection portion (2), and in that an air distribution device (9, 10, 11) for distributing air supplied through the aperture (3) to a plurality of air outlet openings (14) provided in the hollow body is provided downstream of the aperture (3)

A device for gassing a liquid, including a rotor, which is driven to rotate and has multiple vanes for conveying the liquid, and a stator, which surrounds the rotor and has a plurality of flow channels, which each extends starting from a radially inner inlet opening adjacent to the rotor through the stator to a radially outer outlet opening and are delimited along their length by side walls, bottom surfaces, and top surfaces and can be acted on with liquid by the rotor in the region of the inlet opening, wherein between the inlet opening and the outlet opening, the side walls and/or bottom and top surfaces of the flow channels have a multitude of gassing openings, which can be acted on with compressed gas from a compressed gas source in order to introduce this gas into the flow channels. A corresponding method for gassing a liquid is also disclosed.

A hyperboloid agitator for circulating liquids, in particular water, wastewater or the like, in the centre of which a connection portion (2) for connection to a hollow agitator shaft (1) is provided, characterised in that the hyperboloid agitator is formed as a hollow body, with a central aperture (3) for supplying air being provided in the connection portion (2), and in that an air distribution device (9, 10, 11) for distributing air supplied through the aperture (3) to a plurality of air outlet openings (14) provided in the hollow body is provided downstream of the aperture (3).

An apparatus for aerating bodies of water, comprising a floating platform (19), a motor (15) supported by the floating platform (19), a transmission (16) which is coupled to the motor (15) and whose output shaft is in the form of a hollow shaft (17), a fan for supplying air through an air supply line (18) connected thereto, wherein the air supply line (18) is connected to one end (E1) of the hollow shaft (17), a hollow stirring shaft (1) coupled to the other end (E2) of the hollow shaft (17), an stirrer (K) affixed to the free end of the approximately vertical stirring shaft (1), wherein the stirrer (K) is designated as a hollow body and has a central opening (3) through which air supplied by the stirring shaft (1) can pass, and a multiplicity of air outlet openings (14).

A sparger device includes a sparge tube having opposed distal ends, an inlet opening, and a plurality of sparge holes along a longitudinal extent of the sparge tube between the opposed distal ends, and a central hub coupled with the sparge tube at a point intermediate the opposed distal ends of the sparge tube, the central hub having a fluid passageway in fluid communication with the sparge tube via the inlet opening.

A housing assembly is formed of upper and lower cases with top and bottom plates and an intermediate plate separating the upper case and lower cases. An agitation assembly includes water in the lower case. A plurality of paddles submerged in the water are rotatable to agitate the water. An inlet assembly includes an inlet pipe having a top end above the top plate with a module receiver and a bottom end submerged in the water. A vaporizing module is coupled with the module receiver to form an annular passageway terminating at the top end of the inlet pipe. A heater adjacent to the inlet pipe is adapted to heat vaping material whereby gaseous output will tumble down the annular passageway then down the inlet pipe into the water. An outlet assembly includes an outlet pipe having a top end and a bottom end terminating below above the water.