Circular lamella clarifier

Claim 1

A circular lamella clarifier comprising an input means, an output means, a pump means in fluid communication with said input means and said output means, lamella means comprising a plurality of vertically stacked thin-walled hollow frusto-conical spaced-apart convoluted lamella members, each of said lamella members having a central opening in vertical alignment with the central openings of the said other lamella members, a plurality of circumferentially distributed inclined V-shaped troughs which divert downwardly, each of said troughs including oppositely disposed trough walls, a plurality of conical peak sections, each of said peak sections separating adjacent pairs of said trough walls, each of said troughs having a sludge port extending therethrough at the lower most portion thereof and in vertical alignemnt with the sludge ports of said other lamella members, said sludge ports including sludge port walls extending below said lower most portions of said troughs, said troughs including integral dam means, said dam means surrounding a predetermined portion of each of said sludge ports, said dam means including a lowermost dam portion at the outer periphery of said lamella member and a pair of oppositely disposed sidewall members adjacent said lower most dam portion, integral flow-straightening radially-extending lip members extending from each of said trough walls at the outer periphery of lamella member, a containment means for housing said lamella means, said containment means in fluid communication with said input means and said output means, integral spacer and support means for providing a predetermined gap separation between said lamella members, sludge removal means for removing sludge collected from said lamella members.