Combination above grade automatic method of stormwater separation and filtration
AssigneeSWAF, Inc.
InventorsJohn R. Roy, David L. Earl, William L. Hamrick, Philip G. King
Life of this patent
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Abstract
A method and system for treating stormwater runoff containing impurities includes collecting the runoff in a basin and allowing the runoff to settle in the basin for a predetermined time before allowing the filtration step to be initiated. The time delay is controlled by a controller sensitive rain fall, turbidity, or other variables selected by the user. During the filtration step a separator member is positioned floatingly between a filter element and impurities floating on the surface of the unfiltered water.
Claims11
A method for treating stormwater runoff containing impurities after rainfall events comprising the steps of:
- sensing the start of a first rainfall event;
- collecting said stormwater runoff in a basin;
- sensing the end of said first rainfall event and initiating a predetermined sedimentation timing sequence;
- allowing said collected runoff to remain in said basin until sedimentation of a portion of said impurities from said runoff yields a partially treated runoff portion;
- opening a discharge valve upon completion of said sedimentation timing sequence;
- filtering said partially treated runoff portion;
- and
- discharging said filtered runoff portion outside said basin.
Dependencies are inferred from the claim text.