Patent ID: 6884342

Claim:
A wastewater treatment apparatus, comprising: a support structure; a trickle tower supported by said support structure and containing biomedia; said biomedia being in the form of at least one grate comprising a plurality of hanger frames; each hanger frame comprising a row of vertically extending biomedia strands, a pair of mutually connected upper bars, and a pair of mutually connected lower bars, upper ends of the strands of the row being clamped between the pair of upper bars, and lower ends of these strands being clamped between the pair of lower bars; the upper bars of said grate being connected together, the lower bars of said grate being connected together, and the respective rows of strands being spaced apart; and said upper bars being suspended from said support structure and said lower bars being anchored below said upper bars with the rows of strands being tensioned between said upper and lower bars.