A submersible, water circulation system for enclosed tanks such as used by municipalities, fire districts, and industries. The system includes a driving unit having a shell extending along an axis with a pump supported within the shell. The shell has at least one inlet and at least one outlet and is positionable on the floor of the tank with the outlet facing upwardly. The upwardly facing outlet is preferably a thin, upwardly facing, elongated slot and creates a thin, substantially planar discharge of water therethrough that is directed upwardly toward the surface of the body of water. The substantially planar discharge presents a very large surface area for its volume and induces water adjacent the outside of the shell of the driving unit to move upwardly with it toward the surface of the body of water.

An agitation device used in the production of red wine that breaks the cap during fermentation is provided. The device has a body, a depth sensor and a flotation device secured to the exterior of the body. Holes in the body enable the body to submerge into wine in a vessel below the surface. A control system is coupled to the agitator and inflates the inflation device to move the device to the surface of the wine to break through a fermentation cap formed on the surface of the wine.

An immersion mixer includes: a housing; a drive motor residing within the housing; a shaft attached to the motor and configured to rotate relative to the housing; blades attached to and rotatable with the shaft; a handle attached to the housing, the handle including a first segment and a second segment attached to the first segment and to the housing; and a trigger attached to the handle and operatively associated with the motor. The trigger includes a first segment that is generally parallel with the first segment of the handle and a second segment that is generally parallel with the second segment of the handle. Engagement by a user of either the first segment of the trigger or the second segment of the trigger causes the drive motor to rotate the shaft and blades.

An immersion mixer includes: a housing; a drive motor residing within the housing; a shaft attached to the motor and configured to rotate relative to the housing; blades attached to and rotatable with the shaft; a handle attached to the housing, the handle including a first segment and a second segment attached to the first segment and to the housing; and a trigger attached to the handle and operatively associated with the motor. The trigger includes a first segment that is generally parallel with the first segment of the handle and a second segment that is generally parallel with the second segment of the handle. Engagement by a user of either the first segment of the trigger or the second segment of the trigger causes the drive motor to rotate the shaft and blades.

A mixer machine assembly having a drive unit with an electric motor, a drive shaft assembly connected to the electric motor, and a propeller. The propeller has a hub, a plurality of blades, and a propeller shaft from the drive shaft assembly. The control unit is operatively connected to the electric motor, and is configured for monitoring and controlling the operation of the mixer machine. The control unit monitors a drive shaft torque about a drive shaft of the drive shaft assembly. The control unit determines an average torque range based on at least one torque range, wherein each torque range is the difference between the highest and the lowest torque value detected during a predetermined angle of rotation of the propeller during operation of the mixer machine assembly. The control unit compares the determined average torque range with a predetermined torque range limit value.

Wastewater treatment systems are disclosed. A wastewater treatment system includes a wastewater conduit disposed in a wastewater treatment vessel, a pump comprising an intake and an outlet connectable to the at least one opening of the wastewater conduit, and an adapter comprising a first end and a second end. The adapter is configured, in a treatment mode, to provide a flow path for wastewater from the wastewater treatment vessel through the adapter and pump to the wastewater conduit. The adapter is further configured to, in a backflush mode, provide a flow path for wastewater through the plurality of nozzles of the wastewater conduit and through the adapter and pump for discharge into the wastewater treatment vessel. Methods of treating wastewater using the system and adapter are disclosed. Methods of retrofitting a wastewater treatment system by providing the adapter are disclosed.

A method for controlling operation of a manure arrangement (10) that includes a manure storage structure (3), an agitator (11), and an agitator motor (8) arranged to actuate the agitator (11). The method including monitoring (S1), while mixing manure in the manure storage structure (3) with the agitator (11), a load quantity indicative of a load on the agitator motor (8). The method further including controlling (S2) operation of the manure arrangement (10) based on the monitored load quantity. A manure arrangement (10) arranged to perform the method is provided.

A jet propulsion dry powder dissolution unit that includes a hollow chamber, an upper blending reactor, an impeller, a stator, a stator compartment, a blending reactor nozzle, a submersible actuator, a lower blending reactor, and a solution outlet blending reactor.

A jet propulsion dry powder dissolution unit that includes a hollow chamber, an upper blending reactor, an impeller, a stator, a stator compartment, a blending reactor nozzle, a submersible actuator, a lower blending reactor, and a solution outlet blending reactor.

A liquid polymer or chemical activation system, having a chamber; a top cover plate, a middle cover plate and a bottom cover plate; wherein such configuration creates a hollow space inside the chamber that is flanked by the top cover plate and the bottom cover plate; a blending reactor with one or more inlets for receiving one or more substances; an upper multistage mixing cup configured to receive the one or more substances from the one or more inlets; at least one high shear mixer for mixing the one or more substances; at least one submersible actuator for actuating the high shear mixer; an intermediate blending section for receiving the one or more substances from the upper multistage mixing cup; a lower multistage aging cup for further mixing of the one or more substances; and at least one outlet on the bottom cover plate for releasing the one or more substances.