The WWETCO FlexFilter™ from WesTech uses a synthetic compressible media to capture solids in a high rate filtration process. Rising influent applies hydrostatic force to the outside of tapered flexible bladders causing the media within the bladders to compress loosely at the top of the filter, with a tighter porosity gradient through the depth of the filter. This tapered compression provides for a filtration bed that is more open at the top of the filter, graduating to more densely packed synthetic media in the deeper portions of the filtration bed. The simple gravity system includes a unique backwash system involving an air scour coupled with a high energy wash cycle and specialized backwash troughs to minimize the volume of backwash water needed.
WesTech Engineering Inc.