Patent ID: 6939462
Filing Date: 2005-09-06
Classification: B29K,C02F,Y02W

Abstract:
1. A biomedia filter unit for incorporation in a trickle tower wastewater treatment apparatus, said filter unit comprising: a grate comprising a plurality of hanger frames, each hanger frame comprising a row of spaced-apart biomedia strands; each frame further comprising a pair of mutually connected upper bars and a pair of mutually connected lower bars, upper ends of the strands of a respective row being clamped between the upper bars and lower ends of these strands being clamped between the lower bars; and the rows of biomedia strands being spaced apart with the upper bars of the grate being connected together and the lower bars of the grate being connected together; an outer structural casing with the upper hanger bars supported inside the casing to support the grate, and the lower hanger bars held downwardly inside the casing away from the upper hanger bars.