Patent ID: 8329045

Claim:
A method for filtering an influent of water or wastewater in a filtration area of a treatment basin, the filtration area having opposing side walls and a floor and discharging a filtered influent, including the steps of: introducing water or wastewater for filtering into the filtration area of the treatment basin above a plurality of stationary cloth media support structures; filtering the influent by gravity such that the influent flows through a plurality of cloth filter media separately attached to each of said plurality of stationary cloth media support structures, each having a length and two ends, a longitudinal axis along said length, a cross-sectional shape and at least one of said ends having an opening, said opening being perpendicular to said longitudinal axis of said length and said opening in fluid communication with an outlet of the treatment area of the treatment basin through a side wall of the filtration area, and each of said ends of said support structure is mounted to and supported by said opposing side walls of said filtration area of the treatment basin; discharging the filtered influent through an effluent plenum defined as a substantially hollow interior which is formed by each said stationary cloth media, support structure and said cloth filter media separately associated with each support structure; periodically cleaning said cloth filter media by backwashing with a linearly moving backwash assembly; and a control system to selectively control said steps.