Abstract: 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.

Abstract: Provided is a defoamer for a fermenter. A defoamer for a fermenter according to an embodiment of the present invention includes: a body (100) having a first hollow (110) at a central portion thereof and having a disk shape; a support (200) having a second hollow (210) connected with the first hollow (110), and extending from an upper surface (120) and a lower surface (130) of the body (100); and a plurality of first vanes (310, 320, 330, 340, 350, 360, 370, and 380) mounted on the lower surface (130) of the body (100).

Abstract: A carbonated beverage maker includes a water reservoir, a carbon dioxide creation chamber, and a carbonation chamber. The water reservoir holds ice water and has a first impeller and a shroud surrounding the first impeller. The carbon dioxide creation chamber contains chemical elements and receives warm water. The chemical elements react with each other to create carbon dioxide when the warm water is introduced to the carbon dioxide creation chamber. The carbonation chamber is connected to the water reservoir and the carbon dioxide creation chamber. The carbonation chamber has a second impeller that includes a stem portion and blades. The stem portion and the blades define conduits therein. The blades create a low pressure region in a lower portion of the carbonation chamber such that carbon dioxide from the carbon dioxide creation chamber flows through the conduits to the low pressure region.

Abstract: Embodiments of the present disclosure describe filter agitators, filtration units comprising the filter agitators, methods of using the filter agitators, and the like. In certain embodiments, the filter agitators comprise a plurality of first fins extending outwardly from a central vertical axis and arranged in a plane oriented substantially perpendicular to the central vertical axis, wherein the plurality of first fins is configured to promote laminar flow of a fluid flowing in a first direction and induce turbulent flow of a fluid flowing in a second direction; and optionally a plurality of second fins positioned above the plurality of first fins and extending outwardly from the central vertical axis, wherein the plurality of second fins is configured to induce or further induce turbulent flow.

Abstract: A fluid distribution system (208) is provided for a reactor vessel (200) defining a reaction chamber (202). The fluid distribution system (208) may include a radial distribution component (224) positionable within the reaction chamber (202) and adjacent a vessel inlet (212) at an end portion of the reactor vessel (200). The radial distribution component (224) may include one or more annular distribution conduits (230) configured to receive a fluid mixture provided to the reactor vessel (200). The fluid distribution system (208) may also include an axial distribution component (226) positionable within the reaction chamber (202) to extend from the radial distribution component (224) along a longitudinal axis of the reactor vessel (200).

Abstract: A reactor for gas-liquid mass transfer between a gas and a liquid or slurry includes a tank for receiving the liquid or slurry having a wall; a drive shaft; an upward pumping impeller; and an aerating apparatus disposed above the upward pumping impeller and extending between the drive shaft and the wall of the tank at a first distance (d1) from the drive shaft and at a second distance (d2) from the wall of the tank, the aerating apparatus encircling the drive shaft at least partially. The aerating apparatus has an outward inclined or curved inner surface for directing at least a part of the flow over the inner surface.

Abstract: Disclosed are devices suitable for performing chemical and/or biological reactions. Also disclosed are methods of simultaneously performing at least two chemical and/or biological reactions under different conditions in a single reaction chamber.

Abstract: A nanobubble-producing apparatus includes a liquid vat provided with a bubble-containing-liquid inlet in an upper part thereof and a bubble-containing-liquid outlet in a bottom part thereof, a microbubble-containing-liquid supply unit to supply microbubble-containing liquid that contains microbubbles to the bubble-containing-liquid inlet of the liquid vat, an ultrasonic collapse unit to radiate ultrasonic waves to the inside of the liquid vat so that an ultrasonic collapse field in which the collapsing of the microbubbles with the ultrasonic waves is concentrated and nanobubbles are generated is formed at a location where the microbubble-containing liquid supplied into the liquid vat through the bubble-containing-liquid inlet flows downward, and a nanobubble-containing-liquid extraction portion where the nanobubble-containing liquid that contains the nanobubbles generated by the ultrasonic collapse unit is taken out of the liquid vat through the bubble-containing-liquid outlet.

Abstract: A concentrate container for an extracorporeal blood treatment machine with a fluid inlet at a first end of the concentrate container and a fluid outlet at a second end of the concentrate container as well as at least one connector to hold a coupling fitting of a fluid conduit, wherein at least one connector is concave in shape and is positioned inside the container. A system for use with this concentrate container, in which the coupling fittings are convex in shape. A connection piece provides for disinfection of the system.

Abstract: Various embodiments include a reactor for implementation of equilibrium-limited reactions comprising: a reaction space; a reactant feed; an outlet for reaction products; a device for accommodating catalyst material; and a stirrer device comprising: a hollow shaft with a gas inlet opening at one end of the hollow shaft; a first stirrer paddle with gas exit orifices mounted on the hollow shaft; and a second stirrer paddle mounted on the hollow shaft proximate the device for accommodating the catalyst material.

Abstract: The invention discloses an agitation device comprising an impeller, an agitating shaft and a power device. The impeller includes a disc, a hub and concave blades. Each blade consists of a concave surface which extends radially and has an annular sector-like shape, the projections of the upper and lower portions of the blade in the horizontal plane are two annular sectors, and the radian of the annular sector obtained by the projection of the upper portion is larger than that of the lower portion, and the annular sector-like shape and the rotation direction of blades are the same, so that each portion of the blades directly faces an incoming flow, the utilization efficiency of blades is increased and the impeller has low energy consumption and high gas-liquid dispersion efficiency. The device is efficient and energy-saving, has low power consumption, high mixing performance and high gas holdup and mass transfer performance.

Abstract: A mixing method, a controller and a mixing device for mixing components in a mixing vessel are provided. The mixing method includes providing a mixing impeller in the mixing vessel; accelerating the mixing impeller from an inactive state to a rotating state in which the mixing impeller rotates at a first desired speed in a first rotation direction; rotating the mixing impeller at the first desired speed for a first time tsteady,1 in the first rotation direction; changing the rotation direction of the mixing impeller, so that the mixing impeller rotates in a second rotation direction at a second desired speed; and rotating the mixing impeller at the second desired speed for a second time tsteady,2.

Abstract: The present invention relates to mixing apparatus for crushing sludge comprising a motor part in which a rotary shaft is inserted into the motor part and the motor part is rotated, a moving part formed to penetrate the motor part from one side to another side and move a chemical which is flowed through an outside chemical feeder to the another side, and a paddle mounted on the another side of the motor part to rotate based on the rotation of the motor part and spray the chemical.

Abstract: Inside a driven cylindrical housing 23 that is a cylindrical rotation member 13, a liquid to be mixed 4 is caused to become an inner circulation current f by extruded plate portions 24A-24D. Discharge ports 22A-22D formed in the cylindrical housing 21 discharge a portion of the inner circulation current f outward as outer discharge current d1-d4 by centrifugal force. At the same time, the outer portion of the liquid to be mixed 4 is sucked into suction ports 23, 30 as suction current e1-e3, h1-h4, thus mixing the liquid to be mixed 4 in the mixing tank 3.

Abstract: A fuel flow control system includes a centrifugal pump, a gas inlet valve, and a control. The centrifugal pump has a fuel inlet, a gas inlet, and an outlet. The gas inlet valve is disposed upstream of the gas inlet and is responsive to valve position commands to move between a closed position, in which inert gas is prevented from flowing into the gas inlet, and a plurality of open positions, in which inert gas may flow into the gas inlet. The control is coupled to the gas inlet valve and is configured to supply the valve position commands to the gas inlet valve to command the gas inlet valve to selectively move to the closed position, such that the centrifugal pump is configured to operate as a fuel pump, or any open position, such that the centrifugal pump is configured to operate as a fuel-gas mixer.

Abstract: A universal wall and bridge mounted aeration apparatus has a track extending between two distinct elevations that is coupled to a wall and bridge mount. An aeration unit is pivotally coupled to the track and has an aerator adapted to operatively at least partially submerge within and aerate a liquid. A selective mover or drive is adapted to operatively move the aeration unit along the track and thereby vary an elevation of the aeration unit. The universal wall and bridge mount supports the track and aeration unit. The universal wall and bridge mount has a first configuration for mounting to a structure such as a stationary bridge, and a second configuration for mounting to a wall. The universal wall and bridge mounted aeration apparatus may be adjusted to position the propeller after installation under the surface of the liquid through three axes of motion freedom.

Abstract: A mixing apparatus is provided that evenly mixes a powder raw material and a liquid raw material. The powder raw material is supplied to and spread out on a rotating disk to form a thin layer of dispersed particle swarms close to the periphery of the rotating disk. A rotary atomizer that synchronously rotates on the same axis is provided above the rotating disk. The liquid raw material is supplied to an inside surface of the rotary atomizer. Then, the liquid raw material is conducted to an atomizing head where the liquid raw material is atomized, and droplet swarms are horizontally radiated. The dispersed particle swarms and the droplet swarms are merged and condensed within a tapered wedge-shaped space, with the result that these swarms change into a fine and homogeneous mixture. The mixture is then radiated from the periphery.

Abstract: With a method and equipment according to this invention the best possible growth start of hygiene indicators and other bacteria and other microbes in water samples is ensured in microbe cultivations for example on Colilert™ media using both static cultivations and bubbled cultures such as in a PMEU (Portable Microbe Enrichment Unit) type cultivation. The objective is the best possible microbiological detection value of a water sample or process sample regardless of whether the said cultivation is implemented without bubbling or other mixing or with it. The equipment and method according to the invention applies to and can be connected with automatic or manual sampling.

Abstract: A beverage foams making device includes a base having a shaft rotatably extending therethrough. A stirring member and a driving member are respectively connected to two ends of the shaft. The stirring member has multiple holes and at least one protrusion extends from the stirring member. The driving member is cooperated with a driving device which drives the shaft to rotate. A cup has a connection portion connected to the base and the stirring member is located in the cup. The stirring member generates foams when the beverage in the cup is stirred by the stirring member. Ice cubes are not broken when making the beverage. The device is mainly suitable for making beverages such as green tea and black tea, alternative, milk, coffee and/or juice is also available.

Abstract: A closed loop compost tea brewing system with a hydroponic reservoir and a compost tea brewing assembly configured to brew compost tea. The compost tea brewer assembly includes a tea brewing reservoir. The system includes has a closed loop arrangement fluidly connecting the tea brewing reservoir and the hydroponic reservoir. The closed loop arrangement is configured to provide continuous fluid flow from the tea brewing reservoir to the hydroponic reservoir, which is recirculated back from the hydroponic reservoir to the tea brewing reservoir.

Abstract: A self-uprighting aeration device that minimizes turbulence and disruption of any sediment layer in a tank. The device includes a float positioned about a first position on a longitudinal axis of the aeration device, a ballast positioned about a second position on the longitudinal axis, and a diffuser. The float and the ballast are configured to orient the aeration device in a liquid with the longitudinal axis substantially aligned with a gravitational vector to dispose the diffuser above the sediment layer. The aeration device can be configured to rest on a support surface in the tank or float above such a support surface. Methods for aerating liquid in tanks with the aeration device are also provided.

Abstract: A container assembly (10) for retaining a liquid (16) during aging of the liquid (16) comprises a container (12) and an oxygenator (230). The container (12) includes a container body (14) that defines a chamber (14A) that receives and retains liquid (16). The oxygenator (230) is positioned substantially within the chamber (14A). The oxygenator (230) includes a fluid source (662), one or more diffusers (672), and a valve (670). The one or more diffusers (672) are in fluid communication with the fluid source (662). The valve (670) selectively controls the introduction of a fluid from the fluid source (662) into the liquid (16) through the one or more diffusers (672). The container assembly (10) further comprises an insert retainer assembly (338) and one or more flavor inserts (440) that are received and retained by the insert retainer assembly (338).

Abstract: A system and method of operating the same includes an absorption tank having a compressor communicating gas thereto, a suspended solid filtration tank having a primary inlet, a secondary inlet, a primary outlet and a secondary outlet and a pump comprising a pump inlet coupled to the secondary outlet and a pump outlet communicating fluid to the absorption tank. The absorption tank forms a solution from the fluid and gas. A turbine mechanically couples the pump with a common shaft extending to the pump. The turbine has a turbine inlet coupled to the absorption tank and a turbine outlet coupled to the secondary inlet. The turbine depressurizes the solution. The system may also use a centrifugal pump in place of a turbine and absorption tank.

Abstract: A method and apparatus for hydrocarbon recovery and/or treatment of frac water includes introducing a volume of water into a formation, recovering the introduced water, with the recovered introduced water further comprising suspended hydrocarbon product. The recovered liquid is treated to remove substantial amounts of the suspended hydrocarbon product, provide the treated recovered liquid with a ORP in a range of 150 mv to 1000 mv, and partially desalinated, and is either re-introduced as treated recovered liquid with the ORP into a formation to assist in recovery of additional hydrocarbon deposits in the formation, or is stored to reduce the ORP and then subsequently discharged into surface waters.

Abstract: A means for obtaining high mass transfer efficiencies in surfactant laden wastewater treatment or process systems is disclosed. The present system employs ultrafine bubbles delivered into a high shear region such as in the draft tube or other containment volume of a mechanically agitated contacting system within which an impeller is placed, or in the venturi or divergent-convergent of a pumped loop within which gas-liquid contacting is carried out.

Abstract: The invention relates to an arrangement for producing a flow in a wastewater treatment tank (1), comprising a substantially horizontal bottom (B) and a horizontal mixer (2, 3, 4), which is provided in the wastewater treatment tank (1) and which has a propeller (4) driven by means of a propeller shaft (3). According to the invention, in order to save energy to produce flows, the axis (A) of the propeller shaft (3) is tilted relative to the bottom (B) by an angle ? of 1 to 10° in such a way that a flow directed toward a surface (O) of the wastewater (W) can be produced by the horizontal mixer (2, 3, 4).

Abstract: A low-turbulent aspirating type aerator, introduced into a body of liquid, comprising of: a gas conveyance tube having a gas inlet end and a gas outlet end; a gas-liquid mixture chamber incorporating; an impeller affixed to a rotatable shaft, at the least one gas intake opening and at the least one gas-liquid discharge opening at or near bottom end of gas-liquid mixture chamber. Rotation of the impeller creates a low-pressure zone (vacuum) allowing gas conveyed via gas conveyance tube to come into contact with rotating impeller forming a gas-liquid mixture at the impeller interface wherein bubbles are formed. Gas-liquid mixture chamber confines gas bubbles thereby allowing the action of impeller and liquid shearing force to produce and discharge micro-sized gas bubbles of predominantly less than 0.85 millimeters.

Abstract: An aeration system for the treatment and purification of liquid is presented. The aeration system includes a decompression chamber extending a length between an inlet end and an outlet end and a motor connected to the decompression chamber. The system includes drive shaft connected to the motor and extending into a hollow interior of the decompression chamber wherein airflow into the hollow interior is restricted through at least one inlet port. An orifice plate is connected to the drive shaft, wherein the orifice plate includes a plurality of apertures. A rotor disk is connected to the drive shaft, wherein the rotor disk includes a plurality of deflecting blades. When the outlet end of the system is positioned in liquid and the driveshaft and rotor disk are rotated micro bubbles are formed in the liquid thereby treating and purifying the liquid.

Abstract: A mixer/aerator described herein may characterize in one aspect as includes a parallel spaced apart array of discs mounted on a drive shaft. Each disc includes flow apertures separated by spokes. Each spoke is shaped to induce a fluid flow through a corresponding flow aperture, wherein the flow aperture trails a trailing edge of the spoke relative to the rotational direction of the discs to thereby induce a columnar fluid translation of the fluid through the array of discs while simultaneously driving the fluid laterally radially outwardly relative to the discs. Upper discs urge the corresponding columnar fluid translation downwardly, and lower discs urge the corresponding columnar fluid translation upwardly. At least one annular turbulent-mixing passageway is formed between the upper discs and the lower discs wherein said upward and downward columnar fluid translations of the fluid mix while being forced radially outwardly relative to the discs.

Abstract: A system for forming mini microbubbles has a housing with an upper end and a lower end, a motor positioned in the housing, a shaft connected to the motor, a plate affixed to the shaft and extending radially outwardly therefrom, and an air line connected to the housing so as to open in a space within the housing adjacent the lower end thereof between the plate and the motor. The plate is positioned inwardly of the lower end of the housing. The plate has a smooth lower surface. The motor is a submersible motor.

Abstract: A disposable mixing vessel comprising a flexible container, a centrally disposed shaft having first and second ends with one or more impellers thereon and a magnetic element associated with a first shaft end, a first flange adapted to rotatably engage the first shaft end and a second flange adapted to rotatably engage the second shaft end.

Abstract: There is provided a microbubble generating method including: supplying a gas to a rotator 2 while rotating the rotator 2 in a liquid; injecting the gas into the liquid from bubble injection holes formed in the surface of the rotator 2; and applying a shear force, produced by the relative movement between the liquid and the rotator, to gas bubbles present on and in the vicinity of the surface of the rotator 2 to generate microbubbles. The microbubble generating method can easily generate a large amount of microbubbles without forcibly creating a swirling flow of fluid.

Abstract: A centrifugal self-priming mixed and inverted-umbrella shaped aerator is disclosed.

Abstract: Circulation and aeration systems for ponds, lakes, sounds, treatment basins, and other bodies of water. In one set of embodiments, water is pumped in a downward direction to circulate ambient oxygen from the atmosphere and produced by plant photosynthesis to deeper strata. In other embodiments, water is circulated within predetermined depth strata. Each system preferably includes a wind turbine, a drive shaft, and an impeller array. Some systems include conduits for conveying and mixing water from and to selected depth strata, or configured as an open impeller-mixing apparatus. Alternative embodiments include systems which incorporate electrical power generation by the wind turbine, solar power generation and use hybrid wind-solar apparatus, and combinations of land-based and in-water based apparatus. A pneumatic pump diffuser and a control flow centered orifice diffuser line are employed in some embodiments.

Abstract: A micro-bubble generating device is provided which is capable of mixing or dispersing micro-bubbles into a liquid with high stability and has a simple structure that permits reduction of a cost of manufacture. A first member and a first packing are superposed on each other on one side of a gas-permeable film, while a second member and a second packing are superposed on each other on the other side of the gas-permeable film. A pressurized gas delivered via a gas inlet of the first member flows through a fluid passage of the first packing, permeates through the gas-permeable film, and is ejected as micro-bubbles into a liquid flowing through a fluid passage in the form of a narrow shallow strip-like groove provided in the second packing.

Abstract: A device for treating a liquid has a chamber and a rotatable cavitation element arranged within the chamber. According to a first aspect, the chamber has a cross-section with different roundnesses in the region of the cavitation element. According to a second aspect, the substantially disk-shaped cavitation element has (preferably oblong) passage openings which have rounded inner walls.

Abstract: Disclosed is an apparatus for mechanically treating a liquid composition contained in a pool, including: —a frame which supports a motor (2) out of the liquid composition, —a drive shaft (6) which is rotatably driven by the motor, —a centrifugal surface aerator (4) which is rotatably driven by the drive shaft in a first rotation direction, —a bottom mixer (8), which is rotatably driven by the drive shaft, in which the motor (2) can be driven in a second rotation direction, counter to the first rotation direction. The apparatus includes a device for activation/deactivation of the aerator, which device is capable of deactivating the aerator (4) in the second rotation direction of the drive shaft (6), so that the aerator is not to rotatably driven by the drive shaft (6), the aerator being inoperative on the liquid composition.

Abstract: A multi-dimensional image rendering device for displaying multi-dimensional images by layering 2D physical pixel configurations featuring a plurality of tubes in a tank, the inner cavities of the tubes are each filled with a liquid medium such that an air pocket is disposed at the first end of each tube; displacement components slidably disposed in the inner cavity of each tube that can slide between a down position and an up position; a tube aperture disposed in each tube; and a moving means operatively connected to each displacement component functioning to systematically move the respective displacement component a fixed distance creating uniform air bubbles.

Abstract: A method and apparatus for separating impurities from a liquid stream includes a feed tank for containing an untreated liquid, a mixer for generating and mixing bubbles throughout the wastewater, and a settling tank for allowing the wastewater to settle for removal of impurities through dissolved gas floatation. The mixer includes a housing and a rotor rotatably mounted within the housing. The rotor is electrically isolated and the peripheral wall of the housing is electrically isolated and the rotor preferably has bores formed in its peripheral surface to produce cavitation to aid in mixing of fluid within the mixer. A power supply is coupled to establish a relatively positive electrical charge on the rotor and a relatively negative electrical charge on the wall of the housing. The charge causes electrolysis to occur within the fluid, which forms small low surface tension gas bubbles on the rotor and housing wall.

Abstract: The invention relates to a device for stirring a liquid in a reactor and for injecting a gas into the said liquid in order to form a gas-liquid dispersion, comprising a) a drive device (1) positioned above the reactor, provided with a vertical output shaft (2) fitted at its lower end with at least one axial flow rotor (4) immersed in the liquid, b) means for introducing gas (3 and 7) above the axial flow rotor (4), c) a deflector (5) placed above the axial flow rotor (4) preventing the gas-liquid dispersion from rising, and d) a deflector (6) placed below the axial flow rotor (4) converting the axial flow of the said axial flow rotor into a radial flow. This device may be used in shallow basins.

Abstract: A stirring device for activated sludges contained in a basin includes a stirring body having a hyperboloidal wall with a lower circumferential surface, and a funnel-shaped recess underside the hyperboloidal wall; a shaft attached to the stirring body; an air supply line adapted to extend along a bottom of the basin and having a vertical section to supply air into the recess of the stirring body; a disk arranged underside the stirring body and spaced away from the lower circumferential surface to form an annular gap therewith; and shear ribs formed under the lower circumferential surface to extend along the lower circumferential surface and surround the annular gap. The vertical section of the air supply line extends coaxially through the disk in relation to the shaft so that when the stirring body is rotating, the shear ribs distribute air bubbles through the annular gap.

Abstract: A device and method prevents freeze over of a fishing hole cut through a layer of ice overlying a body of water. The device has a housing; a motor; at least one water inlet in the housing; at least one water outlet in the housing; and at least one water-moving element driven by the motor and moving water out of the at least one water outlet. The device may spin within the hole and stir water to prevent too rapid ice buildup.

Abstract: A downflow mixer with a gas injection device and/or a baffle plate is provided to improve performance of mixing and/or aeration in basins, lagoons or tanks, particularly as part of water or wastewater treatment.

Abstract: A rotor for use in a slurry separation flotation cell having a tank within which the rotor is contained. The rotor has a shaft that has a conduit adapted to communicate a fluid, preferably a gas such as air, therethrough. The rotor also has impeller blades extending radially from the shaft and a baffle adjacent the bottom of the impeller blades. The baffle extends from an end of the shaft to at or near an outer edge of the impeller blades, directing the gas to the outer edges of the impeller blades for dispersion into the slurry. The rotor is located adjacent a floor of the tank and, in use, draws slurry downwards into the impeller portion and forces it outwards with the gas being mixed therein.

Abstract: The present invention relates to a device for the aeration of liquid media by tube aeration, special tube modules contained therein and the use of a device for the aeration of liquid media.

Abstract: An apparatus and method for the treatment of gaseous effluents involving contact with a liquid may include a gas/liquid contact chamber which can receive a liquid in the lower part thereof and which is topped with a gas cover, wherein the chamber allows a gas to be treated. The chamber may also release residual gases following treatment involving contact with the liquid. The apparatus may also include a turbine that includes one or more stages which ensure improved contact between the gas and the liquid, the upper part of the turbine being equipped with an opening for drawing the gas situated in the gas cover above the liquid; and, preferably, a sensor for measuring the pH of the liquid.

Abstract: The invention relates to a device for stirring a liquid in a reactor and for injecting a gas into the said liquid in order to form a gas-liquid dispersion, comprising a) a drive device (1) positioned above the reactor, provided with a vertical output shaft (2) fitted at its lower end with at least one axial flow rotor (4) immersed in the liquid, b) means for introducing gas (3 and 7) above the axial flow rotor (4), c) a deflector (5) placed above the axial flow rotor (4) preventing the gas-liquid dispersion from rising, and d) a deflector (6) placed below the axial flow rotor (4) converting the axial flow of the said axial flow rotor into a radial flow. This device may be used in shallow basins.

Abstract: A submersible aerator has an impeller which includes blades having partition walls which separate liquid passages and air passages and which is accommodated within a guide casing for rotation between a lower surface of an intermediate plate having an air suction opening and an upper surface of a suction cover having a liquid suction opening. The liquid passages and the air passages meet through communication portions at radially outer ends of rear-side blade partition walls. Intermediate blades are provided at radially outer ends of the liquid passages. A conical space is defined between the blade lower end surfaces and the suction cover upper surface such that the space, which is wide at a portion adjacent to the liquid suction opening, becomes narrower toward a radially outward region including guide vane tongues. A plurality of support legs and a plurality of straining projections are integrally formed on the lower surface of a peripheral portion of a bottom wall of the guide casing.

Abstract: An air injection system for aerating well water with a stream of air and having, a water circulation conduit extending down into the well, an aeration chamber extending upwardly within the well from the circulation conduit, at least one air and water discharge opening adjacent an upper end of the aeration chamber, a support disposed to support the aeration chamber at a predetermined depth in the well, and, an air compressor and a hose connected to supply air to a lower region of the aeration chamber, thus causing upward flow of air and water in the aeration chamber thereby inducing upward flow of water through said water circulation conduit from the bottom of the well to the aeration chamber.

Abstract: A guiding device for submersible motor agitators having a guiding tube and a sliding carriage for carrying a submersible motor agitator. The guiding tube is held in a pivotable lower mount and in an upper mount composed of a bracket and an adjusting lug, and the angular position of the guiding tube can be adjusted via the adjusting lug. The sliding carriage, the adjustment lug and any optional connecting lug are dimensioned in such a way that the sliding carriage carrying the submersible motor agitator can be removed from the guiding tube without disassembling the guiding device.