Abstract: A bar screen assembly includes a bar rack interposed across a passageway. At least one rake arm for raking debris from the bar rack to an upper end of the bar rack is provided. An apron adjacent the upper end of the bar rack receives debris, and the apron is mounted to the frame for movement between a receiving position and a dumping position. A mechanism is provided to sense movement of the rake arm relative the upper end of the bar rack, and a mechanism is provided for moving the apron from the receiving position to the dumping position in response to the sensing mechanism.

Abstract: A combined apparatus for removing grit and grease from sewage includes a tank and a sewage inlet conduit extending into the tank. A mixing eductor receives incoming sewage and aeration is provided within the mixing eductor for upward flow. A down draft baffle outside the mixing eductor recives the aerated fluid and transports it downwardly to enable grit to settle out of the influent. The tank has a volume sufficient for settling substantially all grit from the influent sewage and separating substantially all grease.