Patent ID: 6926839
Filing Date: 2005-08-09
Classification: B01D

Abstract:
1. A method of filtering waste water containing particulate contaminants, comprising the steps of: a) introducing waste water into a filtration apparatus comprising a housing with a bottom and an upwardly extending surrounding wall, said surrounding wall having an upper edge which defines an inlet for receiving waste water containing particulate contaminants; a substantially planar filter element having an interwoven filtering material disposed in said housing and spanning between said surrounding wall, said filter element spaced between said bottom and said inlet of said housing at an angle thereby defining an upper end and a lower end of said filter element; a dividing wall extending from the lower end of said filter element to said bottom of said housing thereby defining an unfiltered water space and a filtered water space; a first discharge outlet in fluid communication with said filtered water space for discharging filtered waste water; a second discharge outlet in fluid communication with said unfiltered water space for discharging particulate contaminants; and an overflow outlet in said unfiltered water space having an elbow-shaped inlet; b) discharging filtered water from the first discharge outlet; c) discharging particulate contaminants from the second discharge outlet; d) maintaining a reservoir of unfiltered water in the unfiltered water space which contains particulate contaminants which form a film of solid waste on a surface thereof; and e) discharging unfiltered water from below the surface of the unfiltered water in said reservoir through said elbow shaped, inlet for recycling into said filtration apparatus.