Sedimentation removal assembly for flow-through sedimentary tank

Abstract

Solids removal assemblies (14) adapted for use in flow-through or batch-type sedimentation tanks (12) are provided which increase the efficiency of solids removal and eliminate physical scraping devices common with such sedimentation tanks. The preferred removal assemblies (14) include an elongated hood (34) disposed over a cooperating and complementally configured fill structure (26,28), which fills the majority of the internal volume of the hood (34). The hood (34) includes converging sidewalls (44, 46) having lower most inlet openings (54) and spaced, tubular outlets (56) adjacent the apex thereof. Outlet pipes (64) are operably coupled with each of the hood outlets (56) for suction withdrawal of waste water-solids suspensions which are then conveyed for downstream processing. The hood (34) and fill structure (26, 28) cooperatively define restricted flow paths for the waste water-solids suspensions, and assist in the creation of relatively high velocity movement of the suspensions to prevent bridging or clogging by collective solids adjacent the bottom of the tanks (12).

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