Patent ID: 6345810
Filing Date: 2002-02-12
Classification: B01F,C02F,Y02W

Abstract:
An aerating unit adapted to treat a body of waste water, comprising:a container adapted for storing the body of waste water; a submersible motor disposed in said container and having a shaft extending downwardly and outwardly therefrom into the body of waste water, said shaft having a bottom free end provided with a propeller; an air conduit adapted to be connected to an air supply at one end, and extending into said container at the other end which defines an air outlet that is disposed adjacent to and that faces toward said propeller, said air conduit being adapted to introduce air into the body of waste water stored in said container, thereby generating larger air bubbles inside said container that are directed toward said propeller, said motor being operable so as to enable said propeller to break the larger air bubbles into finer air bubbles that are directed downwardly; and a base disposed below and aligned vertically with said motor in said container, said base having a curved surface which is convex in a direction towards said propeller for deflecting the finer air bubbles directed from said propeller in radial directions of said curved surface in the body of waste water; wherein said base includes a shell body which defines said curved surface on a convex side adjacent to said propeller, said shell body having an apex aligned with said shaft, a bottom peripheral end radially offset from said apex, an intermediate region extending circumferentially and downwardly from said apex to said bottom peripheral end, and a bottom end flange extending radially and outwardly from said bottom peripheral end and mounted securely on a bottom of said container, said shell body and said bottom of said container confining a chamber therebetween.