The present invention is a nutrient separating filter basket for a storm water drain system. A filter basket is installed within a storm water drain pipe system and receives storm water runoff therethrough and collects organic materials, such as grass clippings, leaves and tree stems, therein.
Drain water, which is frequently laden with trash, grass clippings, tree leaves and stems, sand, gravel, and other forms of sediment, is collected from streets, parking lots and other areas into a storm drain inlet where it is directed into a storm water drain pipe system. The drain water laden with trash, leaves, grass clippings, sand and gravel collected from the streets is fed through an entrance into a storm water catch basin and into a lake or retention pond. The retention pond can tolerate a certain amount of grass clippings and leaves collected from parking lots or along the street but debris left in the water for a long period of time decays and allows a buildup of soluable nutrients, such as nitrates and phosphates, to accumulate in the water. Thus, it is desirable to remove organic debris from the water collected from the drain water before it enters into lakes and retention ponds.
The present filter basket is added directly to the storm water drain pipe system for collecting trash, leaves, grass clippings, tree stems, and other organic matter in a manner to dry these materials before they can rot in the water and release soluable nutrients into the water. Sand, gravel, or other non-organic sediments can pass through the basket screen walls and collected within a drain water catch basin. The present system provides for an easily cleaned filter basket which allows rapid cleaning of the filter basket and filter box in situ.
In my prior U.S. Pat. No. 6,428,692 for an In-Line Storm Water Drain Filter System an in-line storm water drain filter and baffle box is installed within a storm water drain pipe to direct storm water runoff through the storm water drain pipe and through the filter and baffle box prior to the storm water drain water passing through an outfall into a lake, pond or retention area. This patent is for a filter system and includes a housing having an inlet and outlet and a plurality of chambers formed therein. The housing cover allows for access into a housing. A plurality of filter screens are mounted over each of the plurality of housing chambers for collecting trash from the storm water passing therethrough.
The present invention is an improvement to this prior U.S. patent and allows a screen filter basket to receive the inflow of storm water and to collect all of the larger debris while letting the water pass along with sand and grit to pass through the screen and into a baffle and settling box. A plurality of doors in the filter basket allow for the in situ cleaning of debris therefrom and from the settling box therebeneath.
The present invention is a storm water drain system having a nutrient separating filter basket installed within the storm water drain pipe system to receive storm water runoff therethrough and collect organic materials, such as grass clippings, leaves, and tree stems. The storm water drain system has a housing having an inlet thereinto and an outlet therefrom and having a plurality of interior walls, each having a top edge forming a plurality of open top chambers below the inlet. A filter basket having a rigid frame and a plurality of screen sides and a top and bottom and an open front end is attached to the interior wall edges. A pair of top screen filter doors cover most of the top for entry into the filter basket while a pair of bottom screen filter doors cover most of the bottom for entry into the chambers therebelow when the top screen filter doors are open. An inlet feed chute is attached to the filter basket open front end and is positioned in front of the storm water housing inlet for directing entering storm water into the filter basket. Water entering the housing inlet is directed by the inlet feed chute into the basket and through the screen sides and bottom while the filter basket is collecting the organic debris therein.
Other objects, features, and advantages of the present invention will be apparent from the written description and the drawings in which:
Referring to the drawings and especially to
The screen door 18 can be in its normal closed position, as seen in
The filter basket 10 portion 20 can compact the entering debris therein and is prevented from being retained in the storm water for long periods of time where it would decay and allow the water to build up soluable nutrients, such as nitrates or phosphates. By removing the organic debris from the water before the drain water enters into lakes, retention ponds, or settling boxes, the build up of these soluable nutrients is prevented. Once the box is filled with organic debris, it can be easily cleaned in situ by opening the filter box 11 top openings, then opening the doors 24 and 25 and, using a vacuum hose, to rapidly remove all of the debris collected in the filter basket 10. Once the debris is removed, it is also necessary to remove the collected sediment, such as sand, gravel, and the like in the bottom of the filter system or filter box 11. This is done by opening the doors 31, 33 and 34, as seen in
It should be clear at this time that a storm drain filter basket has been provided which advantageously allows the rapid cleaning of the filter basket as well as the collected sediment from the bottom of a connected settling box or filter system. However, the present invention is not to be construed as limited to the forms shown which are to be considered illustrative rather than restrictive.
This application claims the benefit of U.S. Provisional Application No. 60/661,650, filed Mar. 11, 2005.
Number | Date | Country | |
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60661650 | Mar 2005 | US |