A pumping and comminution device is disclosed that includes at least one submersible pump located in a container that is suitable for receiving and inflow material and a drive for driving the submersible pump. In said device, the at least one submersible pump comprises an impeller located in a submersible pump housing, said submersible pump housing having a suction connection for suctioning the inflow material into the submersible pump. Tools are located on the inner face of the submersible pump housing and/or the impeller, allowing solids contained in the inflow material to be comminuted.

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 water treatment system (1) for a reservoir (3) of water (5) including a mixing unit (2) located outside of the reservoir (3) and in an overall flow path of water from the reservoir (3) to and through the mixing unit (2) and back into the reservoir water (5). The mixing unit (2) is operable in three disinfectant modes that selectively add (a) chlorine, (b) ammonia, or (c) a blended mixture of chlorine and ammonia forming chloramines into the water returning to the reservoir (3). The mixing unit (2) also has hard and soft flush modes. In the hard flush mode, water (5) from the reservoir (3) is continually moved to flush through the mixing unit (2) and back to the reservoir (3). In the soft flush mode, the incoming hard water (5) from the reservoir (3) is softened to remove calcium and other minerals before passing through the mixing unit (2) and back to the reservoir (3) to reduce the undesirable build up of mineral deposits in the mixing unit (2).

A beverage stirring assembly for selectively stirring a liquid in a container includes a container that may contain a liquid. A stirring unit is removably coupled to the container and the stirring unit is selectively manipulated. The stirring unit stirs the liquid when the stirring unit is manipulated. Moreover, the stirring unit is selectively removed from the container thereby facilitating an interior of the container to be washed.

The invention relates to a container, in particular a fermenter for a biogas plant, wherein in the container a mixer is arranged that can be removed through an inspection opening provided in a container wall. A boom is provided for this purpose. Furthermore, the invention relates to a related method and a related use.

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.

An apparatus for use in a bathtub containing water includes an outer shell, a soap holder, configured to hold a liquid soap, at least one set of blades, and a motor disposed within the outer shell and coupled to the set of blades. The motor is configured to form soap bubbles by spinning the set of blades such that the blades lift the water from the bathtub, and pass the lifted water, together with liquid soap from the soap holder, through air.

A method for controlling a treatment apparatus arrangement in a treatment plant, the treatment plant including a basin housing a liquid and solid matter. The operating condition in the basin is anoxic and/or anaerobic, and the treatment apparatus arrangement includes at least one mixer machine located in the basin and a variable speed drive operatively connected to the mixer machine. The variable speed drive operates the mixer machine alternately in a Normal Operation Mode, in which an operational speed of the mixer machine is at least the greater of a suspension speed and a process speed, and a Reduced Operation Mode, in which the operational speed of the mixer machine is below the suspension speed. Also described is a treatment apparatus arrangement and a treatment plant, respectively.

A rotary gas bubble ejector has a fluid reservoir chamber having at a bottom end a fluid discharge opening and a shaft extending through fluid reservoir chamber in connection with a rotor plate. The rotor plate has an outer dimension greater than the outer dimension of fluid discharge opening and is positioned proximate bottom end of fluid reservoir chamber such that a fluid acceleration gap is formed. Rotation of the shaft and rotor plate initiates a fluid flow thereby generating a low-pressure zone within the fluid acceleration gap, wherein gas is discharged from the fluid reservoir chamber into the fluid acceleration gap. As the gas is expelled from the fluid acceleration gap, fluids, gas and liquid, are brought into contact producing micro-sized gas bubbles that are ejected into the body of liquid.