Patent ID: 6030529
Filing Date: 2000-02-29
Classification: B01D,B03D

Abstract:
A biological reactor 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,biological material for treating liquid flowing therethrough,a collection trough in the tank positioned above the bed of media for draining off and collecting treated liquid when fluid is supplied through the bed of media, the collection 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 collection trough and for deflecting upwardly flowing fluid and entrained media grains away from the collection trough, the baffle assembly including at least one baffle portion spaced from the collection trough, anda settler assembly located between the baffle portion and the collection trough, the settler assembly including means defining at least one row of flow passages for controlling upward fluid flow adjacent the collection trough and preventing turbulent flow of liquid flowing upwardly between the collection trough and said baffle portion, the row of flow passages being between the collection trough and the baffle portion, the row of flow passages extending along the length of the collection 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 the collection trough.