Enhanced flocculation and energy dissipation feedwell assembly for water and wastewater treatment clarifiers

摘要

An enhanced flocculation and energy dissipation feedwell assembly includes an influent feedwell and a plurality of feed outlet structures. The influent feedwell is disposed about an influent riser pipe of a clarifier from which a liquid enters the influent feedwell. The influent feedwell has a bottom wall and a continuous side wall. The bottom wall has a plurality of holes therethrough. The feed outlet structures are supported below the influent feedwell such that adjacent ones are directed to achieving opposing jets of liquid flow to enhance flocculation and distribution and dissipate energy and thereby minimize formation of currents. Each feed outlet structure includes a first tubular portion and a plurality of second tubular portions. An upper end of the first tubular portion is open and attached to and about one of the holes in the bottom wall of the influent feedwell such that the liquid flows in a first direction from inside the influent feedwell through the open upper end of and into the first tubular portion of the feed outlet structure. A lower end of the first tubular portion is closed. Each second tubular portion is arranged about and attached adjacent to the lower end of the first tubular portion such that the liquid flows in a second direction different from the first direction from inside the first tubular portion through the second tubular portion to a sedimentation section of the clarifier.