Abstract: A filter apparatus includes a tank having an inlet and an outlet, a filter frame disposed inside the tank between the inlet and outlet, and filter material supported by the filter frame. The filter material filters out suspended solids from liquid influent that is passed through the filter material as the liquid influent flows from the inlet to the outlet. The filter apparatus is provided a suction generating assembly having a positive displacement pump, and a suction member in fluid communication with the pump and positioned adjacent an inlet surface of the filter material. The suction generating assembly is operable to draw filtered liquid in a reverse direction through the filter material to remove filtered solids therefrom. The filter apparatus also utilizes spray nozzles for directing a liquid stream of a cleaning solution at high velocity to the filter material thereby washing the filter material.

Abstract: A method and apparatus for cleaning a filter apparatus of the type having an atmospherically vented tank, a rotatable filter frame in the tank having filter material thereon providing one or more filter effluent compartments on the filter frame. An influent line supplies liquid containing suspended solids to the tank and a filtered effluent outlet communicates with the filter effluent compartment, and a spray wash device including spray nozzles is operable during a wash cycle to direct high pressure liquid spray at a side of the filter material on the filter frame in a spray zone. An air tight hood is mounted inside the tank and extends above the upper periphery of the filter frame to an open lower end below the spray zone.

Abstract: A floating mixer of the type including a float for buoyantly supporting the mixer in a water treatment basin, a mixer drive motor mounted on the float and extending upwardly therefrom, and a propeller drivingly connected to the motor and disposed below the float for pumping liquid downwardly to effect mixing in the water treatment basin. A foam dispersing spray nozzle is mounted above the drive motor for discharging in a downwardly directed generally conical spray pattern outwardly of the drive motor, and an auxiliary pump is provided for pumping liquid from the basin to the spray nozzle.

Abstract: A floating decanter apparatus including a float adapted to buoyantly support the decanter apparatus, a decanter receptacle disposed below the float and having an open top surrounded by a peripheral upper decanter rim and outlet means for decanted liquid communicating with said decanter receptacle at a level below said decanter rim. The decanter receptacle is mounted on the float for movement toward and away from the underside of the float and a power operated actuator is mounted on the float and operatively connected to the decanter receptacle for selectively moving the decanter receptacle from a lower position in the decanter rim spaced below the underside of the float to a raised position to seal the decanter rim to the underside of the float.