Patent ID: 7892421

Claim:
A cloth media filtration system for treating water or wastewater by gravity in a treatment basin having side walls and having influent and effluent channels, comprising: a stationary and substantially hollow cloth filter media support structure forming an effluent plenum and positioned in the basin, said cloth filter media support structure having a length and two ends, one end being an open end mounted to and supported by a side wall of the treatment basin and in gravity flow fluid communication with an outlet of the treatment basin on a side wall of the treatment basin, and the other end supported by and mounted to an opposing side wall of the treatment basin, whereby the length of said support structure extends between opposing walls of the treatment basin and said support structure is fixed to and within said treatment basin; a cloth filter media attached to and supported by said support structure to filter said influent by gravity; and a traversing backwash system including a self-aligning and linearly moving backwash assembly having backwash shoes external to said cloth filter media support structure for periodically cleaning said cloth filter media with suction, said self-aligning backwash assembly having a hinged rocker cage that is external to said cloth filter media support structure.