Patent ID: 7182856
Filing Date: 2007-02-27
Classification: C02F,E03F

Abstract:
1. A system for cleaning runoff water comprising: a. a physical separator that removes at least one contaminant from the runoff water passing through it, said separator having an inlet for receiving runoff water from a source of such water and also has an outlet, b. a reservoir far receiving water from said outlet, said reservoir having an outlet, c. a filter receiving water from said reservoir, comprising at least a first filter cell surrounding a second filter cell, each said filter cell comprising (i) an inlet layer including an open end for inputting water to be filtered and an opposite end closed to fluid flow, and (ii) a filtration layer surrounding said inlet layer and comprising first and second porous sidewalls having filter media therebetween; a boundary layer between each adjacent cell for preventing flow of water between cells, and a boundary wall surrounding the outermost cell, each cell having a drain that surrounds the input and filtration layers of the cell, said drain of each cell, other than the outermost cell, being surrounded by one of said boundary layers, and d. a limiter for limiting the flow of fluid from said reservoir to said filter.