Abstract: A modular plate settler for use in a liquid clarifier system having one or more inlet ports for receiving an influent flow of liquid, a settling tank for settling and collecting solids separated from the influent flow of liquid and outlet weirs for discharging an effluent flow of clarified liquid. The modular plate settler comprises a parallelogram shaped enclosure provided with a full bottom opening for receiving the influent flow of liquid from the settling tank, and a plurality of inclined parallel gravity settling plates within the enclosure and over which the influent flow of liquid passes toward a full top opening, whereby the solids settle on the plates and slide downwardly under gravitational force into the tank. The flow of liquid is thus clarified of solids and flows through the top opening and effluent trough toward the outlet weirs.

Abstract: A rotatable skimming trough assembly is used for skimming a liquid layer from an upper region of a tank contained liquid. The trough assembly comprises a trough extending across a portion of a tank and a bearing for rotatably mounting each end of the trough in the tank. The trough includes a cylindrical bearing sleeve which is mounted within the bearing. The bearing includes internally of its housing a plurality of rollers on which the cylindrical bearing sleeve rests. A sealing device defines a seal cavity for the rollers within which an non-emulsifying grease or oil is provided. The bearing arrangement for the trough assembly provides for extended life with minimal chance of freeze up or seizing of the bearings for the assembly.