Patent ID: 6027645
Filing Date: 2000-02-22
Classification: B01D,B03D

Abstract:
An apparatus for treating liquid, said apparatus comprising:a tank having an upper portion and a bottom for containing liquid and a bed of media for treating liquid flowing through the bed of media,a trough in the tank positioned above the bed of media for draining off liquid when fluid is supplied through the bed of media, the trough having a length and including a lower portion and upwardly extending sides, at least one of the sides having an upper edge defining a weir,a baffle assembly for controlling upward fluid flow around the trough and for deflecting upwardly flowing fluid and entrained media grains away from the trough, the baffle assembly including at least one baffle portion spaced from the trough, anda settler assembly located between the baffle portion and the trough, the settler assembly including means defining at least one row of flow passages for controlling upward fluid flow adjacent the trough and preventing turbulent flow of liquid flowing upwardly between the trough and said baffle portion, the row of flow passages being between the trough and the baffle portion, the row of flow passages extending along the length of the trough and the row of flow passages each being divided into a plurality of discrete and separate flow passages, the flow passages being separated with respect to one another and spaced substantially along the length of said trough.