Abstract: A storm sewer drainage grate filter for above grade installation and use includes a frame and a screen supported by the frame. The frame may include a top ring, a bottom ring, and one or more intermediate rings. The rings may be interconnected by a plurality of risers. A method directed to fitting a storm sewer grate filter apparatus to a storm sewer opening includes installing an above grade grate filter having a frame and screen supported by the frame, allowing debris to accumulate on the exterior of the grate filter, and clearing the debris from the exterior of the grate filter.

Abstract: An exfiltration apparatus for removing contaminants from a fluid, the exfiltration apparatus including a housing defining a fluid flow path and having a first filter/sorptive layer positioned within a first portion of the housing and a second filter/sorptive layer positioned within a second portion of the housing. The first portion of the housing and the first filter/sorptive layer are removable as a unit from the second portion of the housing. The exfiltration apparatus may also include a container positioned within the second filter/sorptive layer and a third filter/sorptive layer disposed within the container. The exfiltration apparatus may also include a container defining a fluid retaining chamber. The chamber may be generally positioned between the first filter/sorptive layer and the second filter/sorptive layer.

Abstract: A device for use in the removal of unwanted solids from stormwater drainage systems is disclosed. The device (1) comprises a lower unit (6) and an upper unit (7). The lower unit (6) is a substantially rectangular open-topped housing with tapering sides (8, 9) to its base (10). The upper portion of each of sides (8),(9) includes a series of perforations (11, 12, 13), (14, 15, 16) across its width, the lower portion (26) of the sides (8, 9) being devoid of such perforations. The base (10) of the lower unit (6) includes a number of smaller size perforations (17). The upper unit (7) is, in top plan view, of substantially rectangular shape corresponding to that of the lower unit (6) to which it is removably fitted. The upper surface (22) of the upper unit (7) tapers downwards to an outlet (23). The outlet (23) includes a collar (24) which extends into the body of the lower unit (6).

Abstract: A complete storm water management system and process which performs both drainage and treatment tasks and incorporates a wetlands water treatment system. This system creates an infrastructure, flow control which is multi-level and multi-stage. This system incorporates a self-contained wetlands treatment system. This is a modular system which includes three or more linear chambers through which the storm water or other influent passes and is cleaned. The influent which flows into a storm drain, curb inlet, or inflow pipe into the system is directed first into a screening type catch basin inset filter within the first chamber of the system. The wetlands chamber is composed of one or more modular segments which may be made in various depths, lengths and widths. The influent is treated within the first chamber before it passes out of this chamber into the incorporated wetlands system.

Abstract: A stormwater treatment system including a substantially water impermeable treatment container for treating stormwater through a bioretention mechanism. The treatment container includes an overflow/bypass opening to receive stormwater that bypasses the treatment container filter media, or is only partially treated as a result of high stormwater flows in excess of the capacity of the container to treat the stormwater. The stormwater is directed into the container through an inlet, such as an inlet pipe, preferably connected to a roof drain system for processing and treating stormwater from the roof of a building. The overflow/bypass opening may be adjacent the top wall or bottom wall of the container.

Abstract: An input chamber receives runoff water to be cleaned. Part of the way up the chamber wall is a restricted outlet which feeds a system for cleaning the water. At a still higher elevation another opening allows runoff water to flow to another cleaning system. Near the top of the chamber is an outlet pipe. A vertical baffle in front of the outlet cleans water that flows under the baffle on its way to the outlet. When the incoming flow rate is very high, water passes over the baffle to the outlet.

Abstract: What is disclosed are compositions, devices, and methods for use in environmental remediation. The compositions are for use in a variety of environmental remediation barriers including fiber rolls, mats or blankets, and berms. Applications for the use of the compositions, devices, and methods include remediation of runoff water, of livestock waste, of eutrification of waterways, and for the revetment of banks.

Abstract: Disclosed herein is a vortex separator for separating floating and settling substances from storm-water. The vortex separator of the present invention can separate fine settling substances as well as coarse settling substances, floating substances and oil from storm-water. To achieve the above purpose, the vortex separator of the present invention includes a separation casing, a guide plate, which is provided in the separation casing and supported by a connection plate, and an inlet pipe, which is coupled to the guide plate and extends outside the separation casing, so that the storm-water is drawn into the guide plate through the inlet pipe.

Abstract: A filter assembly is provided that includes a hood, a drain manifold, a filter disposed between the hood and the drain manifold, a drainage space that is disposed between and in fluid communication with both the filter medium and the drain manifold, a check valve that is configured to permit air to escape but not to enter the drainage space so that a siphon can be established that draws additional fluid through the filter medium and into the drain manifold, the siphon continuing until air entering the hood disrupts the siphon, and a check valve cap that is configured to permit air to escape the check valve while preserving an air-filled void above the check valve when the filter assembly is submerged.

Abstract: The invention concerns a method for treating effluents of communities equipped with a wastewater system capable of collecting rain or infiltration water, such that the flow rate of effluents to be treated by a treatment station may greatly vary between a dry weather period and a rainy weather period, whereby is provided a purification plant (1) of capacity substantially adapted to effluent flow rate in dry weather (Qs); upstream of the treatment plant, is provided a filter bed (12) with grown plants for stocking without fermenting, a polluted hydric excess, and for prior treatment; effluent excess (Qp) caused by rain or a storm is directed onto the filter bed (12) with grown plants; the water in stored in the filter bed (12) with grown plants is gradually evacuated to be sent to the treatment plant (1) located downstream.

Abstract: A combination filtration and anti-microbial catch basin filter disposed in a catch basin of a storm water system such that, in addition to removing particulate matter and other contaminants, the concentration of bacteria in storm water that remains resident in the sump of a catch basin after a storm event is severely reduced or eradicated. The catch basin filter comprises a filtration bag depending from the opening such that water must pass through the bag and a plurality of strips or similar members depending from the filtration bag, the length of the strips being such that they remain in contact with water resident in the bottom of the catch basin. In an alternative embodiment, the device comprises a floatation member with filtering means and anti-microbial strips depending therefrom.

Abstract: An erosion control basin is a molded open topped receptacle that has support flanges that will support the basin on the interior of a storm drain grate frame. A filter is formed around an upright perforated drain pipe that is on the interior of the basin and which opens to an outlet. The basin catches debris and silt but permits water to drain out. The top of the drainpipe is left open for overflow purposes.

Abstract: A modular curb inlet filter apparatus having an internal axial tube member on which are disposed at least two disc spacers, which in turn support a cylindrical mesh frame member, which in turn supports a tubular filter fabric. Wedge anchors composed preferably of a compressible polymer foam are provided with anchor bores of sufficient diameter to receive the ends of the cylindrical mesh frame member therein, the anchor bores being disposed near the base of the wedge anchors such that the curb inlet filter inlet apparatus will be seated close to surface of the curb inlet base when positioned within the curb inlet. Preferably the wedge anchors are provided with a base scuff plate made of a durable polymer material to prolong their use life. A short silt flap or skirt depends from the filter fabric, the silt flap extending the approximately the length of the curb inlet filter apparatus to seal any gap beneath the curb inlet filter apparatus and the base of the curb inlet.

Abstract: A self-contained wetlands treatment system to remove pollutants from water and treat stormwater runoff or other grey water. This is system and method wherein the water is passed through a wetland filtering and treatment system. This invention removes solids, metals (dissolved/particulate), nutrients (dissolved/particulate), oils, and bacterial contaminants from the water. The system and system housing can be fabricated, built, and assembled in a broad range of sizes and materials to accommodate and treat a broad range of influent flow rates.

Abstract: In some embodiments, a filtration system may include one or more of the following features: (a) a housing having a bottom portion, a middle portion coupled to the bottom portion and an upper portion, and a cap coupled to the upper portion, (b) a sediment storage area within the bottom portion, (c) a separator area within the middle portion, (d) a porous filter within the upper portion, (e) an access hatch within the cap, (f) an inlet pipe for allowing storm water within a middle chamber, (g) an outlet pipe for allowing filtered water to be discharged from the filtration system, and (h) a central pipe being a passageway through the porous filter.

Abstract: An improved trench drain filter and modular system therefor for intercepting and treating run off water in a trench drain before discharge into a drainage system. The filter elements include a perforated pipe covered with one or more layers of geotextile material, which is, in turn, covered with a permeable fabric membrane. In a preferred embodiment a pouch containing an absorbent agent is disposed within the pipe upstream of the discharge point, and in another embodiment a multi-filter modular unit is provided, the unit including a plurality of filter elements disposed in an enclosure having fluid flow control baffles to direct fluid to and through the filter elements.

Abstract: Screening apparatus (101,901) for use at an overflow weir (301, 902) in a sewerage system. The apparatus comprises a continuous moving screen band (201, 902) and a band cleaning mechanism (608). A first portion (801) of the screen band is configured to move along the weir towards one of its ends, and a second portion (803) of the screen band is configured to move along the weir towards its opposite end. A steeper portion (805) of the screen band extends to an elevated position (806) above the first and second portions, and the band cleaning mechanism is arranged to remove solid matter from the screen at said elevated position.

Abstract: The apparatus and methods of the present invention enable efficient and appropriate treatment of Urban Water Runoff, so that the treated Urban water Runoff can be can be introduced into public waterways without contaminating such waterways. The system apparatus utilizes adsorptive Organoclay media, mechanical filtration and ultraviolet sterilization. The methods and apparatus of the present invention remove contaminants from Urban Water Runoff to a level which enable the resulting effluent to meet appropriate standards for introducing the treated Urban water Runoff in to public waterways. The method and apparatus of water treatment of the present invention does not utilize chlorine containing compounds which, when combined with organic compounds can produce THM's that can become problematic when re-introduced to the downstream environment. The systems of the present invention can be made sufficiently compact so as to enable their use in remote locations.

Abstract: A stormwater filtration system includes a dry well structure including a top having an access opening, a bottom and a sidewall extending between the top and the bottom to define an internal volume of the dry well structure. A deck assembly partitions the dry well structure into an upper region and a lower region. The deck assembly includes a plurality of deck members sized to be delivered through the access opening of the dry well structure and configured to be assembled within the internal volume to form the deck assembly.

Abstract: A storm water interceptor comprises an input conduit connected to a first treatment tank for delivering storm water to the first treatment tank and having an obvert elevation. Also, the interceptor comprises a lower conduit having an invert elevation, a substantially horizontal orifice at a first end connected to the first treatment tank and an exit orifice at an opposite end connected to a second treatment tank, whereby the substantially horizontal orifice at the first end of the lower conduit is below the invert elevation of the lower conduit. The interceptor further comprises an overflow conduit connecting the first treatment tank to the second treatment tank, whereby the overflow conduit is connected to the first treatment tank at a location above the obvert elevation of the input conduit.

Abstract: An upflow stormwater filter has horizontally aligned filter media to provide a high throughput for treatment of contaminated water, longer life to filter media, and without material head drop.

Abstract: A temporary trap having baskets and optionally filters in the baskets used in conjunction with inlets for sewer systems to keep debris, oils or chemicals from being washed into the sewer during construction of roads and sewers. The trap is a box, typically rectangular, square or round, with baskets having a plurality of holes therein for allowing water to pass therethrough while trapping debris therein. The trap is inserted into a inlet by lifting the grate off the inlet frame, inserting the trap and then replacing the grating. After a rain the baskets and filters may be cleaned out and reused or replaced. When the construction project is finished the grate is lifted off the inlet frame and the trap removed. The trap has an overflow opening in case the trap becomes clogged.

Abstract: What is disclosed are compositions, devices, and methods for use in environmental remediation. The compositions are for use in a variety of environmental remediation barriers including fiber rolls, blankets, and berms. Applications for the use of the compositions, devices, and methods include remediation of runoff water, of livestock waste, of eutrification of waterways, and for the revetment of banks.

Abstract: A drainage system for separating oil and debris from water run-off wherein a chamber in the path of flow of the run-off includes a downwardly inclined screen and a debris-collecting fence beneath the screen to maintain separation between the debris and water; and an organic absorber may be positioned in the path of flow of the water beneath the screen to remove organic oils from the run-off.

Abstract: A storm water filter system for filtering storm water being fed into an in-ground well includes a housing having an inlet and an outlet, with the outlet being connected to an in-ground recharge well. A plurality of open chambers are formed in the housing. An inlet filter box has an open end located in the housing and positioned with the open end facing the housing inlet. An outlet screen filter is positioned over the outlet for capturing debris from water entering the outlet and has a bypass for water to pass when the filter becomes partially blocked.

Abstract: The invention provides a runoff water purification system for removing pollutants which accumulate on road surfaces, thereby reducing the workload of the sewage water treatment plants and preventing environmental water pollution. The system 1 is installed under the ground of the side of the road 2. Runoff water runs into the system 1 through a curb inlet 120, is purified and discharged to a sewage pipe 56. The system is made up of a concrete box 11, in which a wall 10 separates the box into a maintenance tank 7 and a treatment tank 9, both of which are connected to each other at their lowest ends. Runoff water flows into the maintenance tank 7 and to the treatment tank 9, through the connecting conduit where pollutants are removed, and discharged to the sewage pipe.

Abstract: A storm water collection system including a below ground basin and a grate covering the basin. The system also includes a removable water impermeable receptacle disposed within the basin and an inner housing for directing ground water passing through the grate and to the bottom of the removable receptacle. The receptacle also includes one or more generally rectangular openings in an upper portion thereof so that water that flows through the inner housing and upwardly between the walls of the inner housing and the walls of the receptacle flow out of the openings and down to the bottom of the basin.

Abstract: A fluid strainer device is disclosed. The device includes a housing which defines an open chamber, the chamber having both at least one fluid input port and at least one fluid outlet port. A plurality of spaced strainer baskets are disposed within the chamber. Each basket has a pair of spaced perforated side panels, a perforated rear panel, a perforated top panel and an open front portion in fluid communication with the chamber fluid input port. Finally, each strainer basket is aligned within the chamber for fluid flow from the chamber input port into the basket's open front portion and out through the perforations thereof to filter debris from the fluid while preventing substantial fluid pressure drop between the input and outlet ports substantially independent of debris buildup within the baskets.

Abstract: A storm drain filter is provided for filtering trash and debris from a stream of water passing through a storm drain. The storm drain filter comprises a panel having a multiplicity of openings formed therein and is adapted to mount adjacent to a sidewall of a storm drain such that the filter lies adjacent an outlet through which water passing from the storm drain flows. When installed in a storm drain, the filter fits relatively close to the outlet and the adjacent sidewall and permits water to flow through the openings thereof, but filters trash and debris.

Abstract: A hydrodynamic device for removing sediment and other materials from storm water runoff is provided. An exemplary embodiment of this device includes: a first substantially cylindrical chamber a second substantially cylindrical chamber concentrically disposed within the upper portion of the first chamber, a first baffle concentrically disposed within the second chamber, and a second baffle disposed within the lower portion of the first chamber. A water inlet is attached to or formed integrally with the second chamber; a water outlet is attached to or formed integrally with the first chamber; and an optional bypass outlet is attached to or formed integrally with the first chamber.

Abstract: A detachable end cap for a molded plastic storm water chamber has an integrally welded pipe stub. The stub cantilevers outwardly from the exterior surface of the end cap, which is preferably dome shaped, to enable connection to a line which carries water to or from the chamber. A polyethylene cap with stub and is used in combination with a polypropylene chamber.

Abstract: Included in the disclosure are exemplary devices, systems, and methods, embodiments of some of which can be useful for controlling erosion, retaining sediment, preventing siltation, treating runoff, removing pollutants, remediating environmental damage, protecting plants, establishing vegetation, protecting ecosystems, and/or restoring waterways and/or other riparian areas. At least one exemplary device includes a tubular mesh enclosure formed from a mesh material having a nominal opening size of less than 0.5 inches, a ratio of a length of the mesh enclosure to a diameter of the mesh enclosure greater than 40, having an opposing pair of ends, at least one of said ends sealed, said enclosure surrounding a filling. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

Abstract: A filter assembly is provided that includes a hood, a drain manifold, a filter disposed between the hood and the drain manifold, a drainage space that is disposed between and in fluid communication with both the filter medium and the drain manifold, a check valve that is configured to permit air to escape but not to enter the drainage space so that a siphon can be established that draws additional fluid through the filter medium and into the drain manifold, the siphon continuing until air entering the hood disrupts the siphon, and a check valve cap that is configured to permit air to escape the check valve while preserving an air-filled void above the check valve when the filter assembly is submerged.

Abstract: Rain water is drained from a golf course sand bunker or like structure by a drainage system which comprises a conduit having a solid top and perforations in the sidewall. A conduit which is a chamber having an arch shape cross section is contained within a sand filled trench running along the bottom of a bunker. Water flows downwardly from the bunker into the trench, passing through opposing side trapezoid cross section spaces which are defined between the outwardly angled chamber sidewalls and the essentially vertical trench sidewalls. The water then flows horizontally into the conduit. Geotextile, in combination with downward sloping louvers which define slot perforations in the chamber sidewalls, hinders flow of sand into the interior of the chamber. The arch shape of the preferred conduit frees the trench bottom of vertical soil-compressive load and enables it to be fully exposed for water penetration.