Abstract: An auxiliary gray water supply device captures used wash water from a commercial warewashing machine for supply to a pre-rinse station without substantial modification of the commercial warewashing machine. The captured wash water and treatment agent are delivered to a pre-rinse station for pre-rinsing of dishes that will be washed within the commercial warewashing machine.

Abstract: A method for installing a liquid quality system into a containment structure, wherein the liquid quality system includes a liquid quality device and at least one drag-inducing assembly, wherein the at least one drag-inducing assembly includes at least one supporting portion and at least one drag-inducing portion, wherein when the liquid quality device is installed a sump region is formed below, is provided. The method may include mounting, at least partially in the sump region, the at least one supporting portion onto a sidewall of the containment structure. The method may also include attaching the at least one drag-inducing portion to the at least one supporting portion. The method may also include mounting the liquid quality device in the containment structure.

Abstract: The invention relates to a building basement flood control system that eliminates termination of sanitary and storm sewer lines within a building. The control system includes a sanitary sewage basin system and a storm water sump pit installed in the basement floor. A sewage pump in the sewage basin pumps sewage through a discharge pipe extending to the exterior of the basement wall for discharge into an open end of an above ground vertical sanitary sewer line adjacent an exterior basement wall. The control system further includes a storm water sump pit installed in the basement floor. A sump pump in the sump pit pumps storm water through a discharge pipe extending to the exterior of the basement wall for discharge into an open end of an above ground vertical storm sewer line adjacent the exterior basement wall.

Abstract: A dechlorinating device includes a mixing chamber having an inlet and an outlet, and the dechlorinating device is configured to receive a fluid. The dechlorinating device also includes a dechlorinating conduit disposed within the mixing chamber and a recirculation zone disposed within the mixing chamber and positioned between the dechlorinating conduit and the outlet. A dechlorinating system includes a storage tank, an overflow pipe in fluid communication with the storage tank, and the dechlorinating device in fluid communication with the overflow pipe. A method of dechlorinating includes providing the dechlorinating device and feeding the fluid to the inlet of the dechlorinating device.

Abstract: An arrangement on flowing bodies of water in the area of a transverse structure and/or water structure, in the form of a fish migration bypass (13) for transporting aquatic animals, in particular fish, between tail water (4) and head water (5), provided with a substantially vertical shaft (17). The water level in the shaft 17 is variable between the tail water and the head water level. A basket-like transport container (15), which can be moved in the shaft (17) and which is provided on the shaft for transport of aquatic animals, is equipped with floats (16), which are filled with air so that water rises/falls in the shaft (17) from the tail water (4) to the head water (5) and from the head water (5) to the tail water (4).

Abstract: The present invention relates to a rotary screening apparatus, and more particularly, a rotary screening apparatus which is installed in an open channel such as drain pump station, water supply intake station, irrigation channel, sewage treatment plant and dam etc. to allow smooth removal of inclusion.

Abstract: Provided is a non-point pollutant source treatment apparatus. The non-point pollutant source treatment apparatus includes an inlet pipe for allowing initial polluted rain (raw) water to flow therethrough, a settling tank coupled to the inlet pipe and storing raw water flowing from the inlet pipe, a drain part disposed at one side of an inside of the settling tank directly under the inlet pipe, and coupled to a drain pipe so as to discharge raw water contained in the settling tank into the outlet pipe, a purifying member disposed at the other side of the settling tank and including purifying plates with inlet holes, a filtering part coupled to an upper portion of the settling tank and filtering foreign substances from raw water, and a backwashing tank coupled to an upper portion of the filtering part and including a purified water pipe.

Abstract: A dewatering device for aggregate product can be used to retro-fit existing aggregate product dewatering facilities in order to more efficiently capture product. The dewatering device can be movable to allow for the portability of the device relative to existing dewatering facilities. The device is adapted to receive a slurry of aggregate product and water and to vibrate to dry the aggregate product. A recycle system is included to receive any fines that may otherwise be lost by the system. The recycle system captures the fines and redirects them back towards the vibrating process of the vibrating device to direct them towards an exit of the vibrating device in order to use said fines as well as the other dewatered aggregate product. The portability of the device allows the device to be used with the existing facilities without the need to completely replace existing components for dewatering aggregate product.

Abstract: Apparatus for recovering spilled oil in water infested with floating ice or other debris comprises a fence having an upper rail and lower rail encircling an area to receive an oil skimmer. A plurality of buoyancy units maintain the fence at an appropriate water level. An ice-deflecting cone covers the bottom of the fence when the apparatus is deployed. A plurality of cables may be attached to the upper rail of the fence to raise and lower the apparatus into the water. The fence is preferably circular, with a diameter in the range of 10 to 50 feet. The fence preferably includes a plurality of spaced-apart vertical supports between the upper and lower rails to keep chunks of ice or other debris from entering into the encircled area, and the lower barrier structure is perforated, with openings in the range of less than an inch to several inches.

Abstract: Provided is a backflow collection system that includes a collection vessel having an upper section and a lower section, the collection vessel having a side opening configured to receive backflow from an oil/gas well, as well as a discharge port proximate an upper end of the upper section configured to discharge pressurized gas from the collection vessel. The backflow collection system may further include an auger coupled proximate the lower section of the collection vessel, the auger configured to receive solid and liquid matter from a bottom opening in the lower section, and when elevated remove at least a portion of the solid and liquid matter from the collection vessel, the collection vessel designed such that when fluid is contained therein it acts as a liquid/gas seal to prevent the pressurized gas from exiting through the bottom opening in the lower section of the collection vessel.

Abstract: The invention relates to a facility for converting water power into mechanical or electrical energy, including at least one hydraulic turbine, a water reservoir (R), and a pipe (5) for supplying the turbine with water (E) from the water reservoir. The facility also includes a device (200) submerged in the water reservoir and suitable for imposing an ascending movement on a water flow (E0) moving in the water reservoir (R) towards the opening (51) of the supply pipe (5), and a gas-collecting means (400), arranged above a portion (V200) of the device (200) in which the ascending movement of the water flow (E0) takes place.

Abstract: Embodiments disclosed herein relate to a fluid distribution apparatus. The fluid distribution apparatus has a housing including an inlet configured to receive a drilling material, a first outlet configured to direct a first portion of the drilling material onto a first separatory surface, and a second outlet configured to direct a second portion of the drilling material onto a second separatory surface. The fluid distribution apparatus further includes a screen disposed within the housing and configured to separate solids from the second portion of the drilling material directed through the second outlet onto the second separatory surface.

Abstract: A screening system comprises a tank (20) containing a sewage screen (30), wherein the tank is configured for attachment to a sewage channel, and to receive sewage flow from an upstream point of the channel, and then to direct the sewage flow through the sewage screen (30), and then to return the screened sewage flow back into the channel, at a downstream point, or directly to a downstream treatment, and wherein the tank (20) is configured to decrease the velocity of the sewage flow in the tank relative to the channel, such that grit can settle at the bottom of the tank, and wherein the sewage screen (30) comprises a working screening surface (31), a portion of which lies in a substantially horizontal plane, and is positioned below the invert level of the sewage channel at the upstream point, when in use. Screen and tank used within the before mentioned system as well as the method of screening sewage using the system are also disclosed.

Abstract: Disclosed herein is an apparatus for filtering sewage and wastewater. The filtering apparatus has a vertical structure including a filtering belt comprising a filter bag or a filter mesh that can filter out fine impurities. For this, the filtering apparatus includes a drive motor that receives power to drive the apparatus, an upper drive drum that is operated by the drive motor, a lower rotating drum that is interlocked with the upper drive drum, and a filtering belt that is wound and rotated around the upper drive drum and the lower rotating drum. The filtering apparatus cannot only filter out fine impurities less than from 0.1 mm to 0.2 mm but also separate earth and sand, unlike conventional filtering apparatuses that cannot conduct them.

Abstract: A system for processing returned drilling fluid including a flow line configured to provide a return flow of drilling fluids and at least one vibratory separator having at least one screen, wherein the vibratory separator is fluidly connected to the flow low and is configured to receive at least a partial flow of fluids and separate the flow of fluids into a primarily fluid phase and a primarily solids phase. The system further includes a dual-trough configured to receive the primarily solid phase from the at least one vibratory separator and a slurry tank configured to receive the solids phase from the trough. Additionally, a method of processing a return drilling fluid including dividing the return drilling fluid into a primarily fluids phase and a primarily solids phase with a primary separatory operation.

Abstract: Debris adhering to the outer surface of a barrel-type fish screen is cleared by air bursts from a series of perforated air pipes positioned inside the outer foraminous shell of the screen, the perforations being holes with axes at an acute angle to the screen radius for efficient use of the air. Separately, the conical water collection manifold mounted inside the shell is open at its narrow end, with a valve mounted to that open end to control the opening. The opening prevents reduced water inflow at that end of the manifold, and the valve adjusts the access of the surrounding water to the opening, thereby allowing the manifold to be tuned to more closely approach a uniform distribution of axial water flow along the length of the collection manifold for different ambient conditions.

Abstract: Provided is foreign-object offshore processing system, including foreign-object inflow prevention devices configured to prevent inflow of foreign object into water intake and provided at interval. Each device includes: collecting pontoon serving as inlet of foreign object and provided to float on sea surface of pool defined by curtain wall, the pool being for drawing cooling sea water from sea toward water intake; bottom net spreading toward sea bottom on upstream side of water intake channel in triangular shape with collecting pontoon as vertex; longitudinal net fixed to two floating chains in suspended manner to spread out in surface area of sea, the two floating chains extending on sea surface from collecting pontoon in correspondence with two sides extending from vertex of triangular shape forming bottom net; and lateral net spreading between bottom net and at least portion of longitudinal net, wherein horizontal net cover covers interval between adjacent devices.

Abstract: A storm water pretreatment chamber is provided. The storm water pretreatment chamber includes; one or more filter sidewalls; one or more optional water-impermeable sidewalls; one or more optional chamber grates; and one or more catch rails. Methods of treating storm water are also provided.

Abstract: A storm drain full capturing system is provided for filtering trash and debris and similar contaminates from a stream of water passing through a storm drain. The capturing system comprises of a control gate panels having a multiplicity of openings mounted adjacent to the sidewalls of a storm drain such that the panels lies adjacent to an outlet through which water flow passing to the storm drain thereof, but filters trash and debris, a composite filter fits relatively close to the outlet and the adjacent sidewall and permits water to flow through the openings thereof, but filters polluted contaminates, and an insert composite collection system for trash and debris is held in place by a removable frame plate, configured to be suspended adjacent to a curb inlet and can be serviced through a conventional manhole entry.

Abstract: An aquatic organism removal system includes a screen system and a return system. The screen system is adapted to separate aquatic organisms from cooling water entering a cooling water intake of a power producing facility and includes a screen intake and a screen exit downstream of the screen intake. The return system is connected to the screen exit and is adapted to receive the aquatic organisms and transfer the aquatic organisms safely to a source waterbody. When the cooling water and aquatic organisms enter the screen intake, the cooling water flows through the screen system and into the cooling water intake of a power producing facility and the aquatic organisms flow out the screen exit and into the return system.

Abstract: A gutter protection device includes an elongated frame having opposite first and second edge portions, opposite first and second end portions, an elongated recessed portion in a medial portion thereof, and one or more insert panels removably secured within the recessed portion. The recessed portion extends from the frame first end portion to the frame second end portion, and includes a plurality of gutter access openings arranged longitudinally in end-to-end spaced-apart relationship. Each insert panel is removably secured within the frame recessed portion, and includes opposite first and second edge portions, opposite end portions, and opposite upper and lower surfaces. Each panel includes a plurality of spaced-apart openings formed therethrough that permit water to flow into a rain gutter. A filtering screen is secured to the insert panel lower surface and covers the insert panel openings. The filtering screen is configured to prevent the passage of debris therethrough.

Abstract: The present invention is a storm water filter system for filtering floatable debris and non-floating pollutants from storm, water passing through a storm water drain system vault. The storm water filtering system has a vault having chamber having a floating skimmer panel between the inlet thereto and the outlet therefrom. The skimmer panel has a filter passageway therethrough for filtering the storm water while the floatable skimmer panel captures floatable debris and trash from the storm water. Storm water entering the vault inlet passes through a filter element in the skimmer panel and out the vault outlet and also can pass under the floating skimmer panel when the floatable skimmer panel is floated to a raised position to thereby prevent storm water from accumulating on the inlet side of the wall.

Abstract: The present invention is a storm water filter system for filtering floatable debris and non-floating pollutants from storm water passing through a storm water drain system vault. The storm water filtering system has a vault having chamber having a wall between the inlet thereto and the outlet therefrom. The wall has a filter passageway therethrough for filtering the storm water and a floatable baffle panel covering a second passageway therethrough for capturing floatable debris and trash from the storm water. Storm water entering the vault inlet passes through a filter element and out the outlet and also can pass under the floating baffle panel when the floatable baffle panel is floated to a raised position to thereby prevent storm water from accumulating on the inlet side of the wall.

Abstract: An environmentally supportive seawater intake system includes a first filtering system in communication with raw seawater for providing a flow of seawater in a first direction into a raceway. A second filtering system is also in communication with seawater in the raceway and is adapted to receive a portion of the seawater in the raceway and directing it in a second direction away from the flow of residual water in the raceway. An input device receives the second portion flowing in the second direction, and a recovery system receives and returns the first, residual portion to the sea environment.

Abstract: A gutter guard for preventing the entrance of debris into the trough of a gutter includes an outwardly convex portion extending lengthwise over the trough of the gutter. A plurality of hoods extend upwardly from the outwardly convex portion and over lie a first set of apertures. The upwardly extending hoods direct water flowing over the convex portion through the first set of apertures. A second set of apertures outwardly from the first set of apertures has downwardly extending hoods underlying, such downwardly extending hoods deflecting water on the inner surface of the outwardly convex portion.

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 basket.

Abstract: The present invention is a storm water filter system for filtering floatable debris and non-floating pollutants from storm water passing through a storm water drain system. The storm water filtering system has a floatable skimmer therein for capturing floatable debris and trash from the storm water and a separate filtration system to filter non-floatable pollutants from water passing therethrough.

Abstract: A wastewater treatment system for treating excess wastewater from a sewer system includes a container having first and second portions adapted to receive excess wastewater from the sewer system, and a generally horizontally oriented screen arrangement disposed in the second portion of the container. The system further includes a treating agent dispenser for introducing a treating agent into the wastewater, and an effluent passage in fluid communication with the second portion of the container. During a sufficient rain event, the wastewater flows from the sewer system into the container, through the screen arrangement, and then into the effluent passage, such that the wastewater flows generally in a first direction through the first portion of the container, then generally in a second direction different than the first direction through the second portion of the container.

Abstract: A filter system for a storm drain having a bottom, side walls, and an outlet formed in the side wall. The filter system includes a main section having an array of openings formed therein for permitting water to flow through the filter. The main section is configured to be mounted adjacent the side wall and aligned with the outlet. In some cases, the bottom of the storm drain includes a depression for feeding water to the outlet. The filter system includes a flexible mesh that extends from the bottom of the main section into the depression for filtering water flowing in the depression. In addition, the filter system includes a mounting structure that enables the main section to be slidably mounted into an operative position and also enables the main section to be removed by slidably moving it from the operative position.

Abstract: A catch basin configured to filter water by way of a matrix filter and a filter pouch. If the matrix filter should become clogged, a bypass weir provides means of bypassing the matrix filter to prevent the catch basin from clogging.

Abstract: A storm water filter box has a floatable skimmer apparatus for preventing floatable debris from entering the filter box outlet. The filter box has an inlet and an outlet and an inlet filter located in the filter box housing. A portable skimmer is positioned in the box between the inlet and outlet and will rise and fall with the water level in the filter box to keep the top of the skimmer above the water level and force the storm water passing through the filter box under the floatable skimmer thereby blocking floatable debris from entering the filter box outlet.

Abstract: A stormwater filtration system includes a stormwater containment structure including a bottom surface, an inlet that receives stormwater and an outlet through which filtered stormwater exits the stormwater containment structure. A flow structure is at the bottom surface. The flow structure includes a conveyance conduit running along the bottom surface of the stormwater containment structure and in fluid communication with the outlet of the stormwater containment structure. The conveyance conduit includes a port extending through a sidewall of the conveyance conduit. A saddle includes an upper component and a lower component connected to the upper component such that the upper and lower components straddle the conveyance conduit at the port. The upper component includes an opening in communication with the port and the lower component supports the conveyance conduit above the bottom surface.

Abstract: A filtration device and method for removing pollutants from fluid such as storm-water. The filtration device has a chamber including a series of pivotal filtration assemblies each including a weir and filter. The filters are selected and positioned for sequentially filtering larger then smaller pollutant particles from the water flowing through the device. The weirs are configured and positioned for sequentially permitting water overflow of (and thereby taking off-line) the smaller-particle size filters then the larger-particle size filters from the water flowing through the device. And the filtration assemblies are pivotally mounted to the chamber walls and configured so that, when one of the filters becomes clogged, the water pressure against it causes that filter assembly to pivot into a bypass position permitting water to flow under it.

Abstract: A method of removing solids from the slurry at a construction site located on or near a stream in order to improve the quality of water discharged into the stream by forming treatment zones for receiving slurry, said zones comprising walls of filter bags and floors of filter skirts, said bags and skirts comprising geotextile material and the bags being filled with a shredded rubber and woodchip combination.

Abstract: In waste water installations, the amount of falling rainwater which increases as a result of heavy precipitations is diverted into lakes and waterways in order to relieve the sewage treatment plant. In order to remove the impurities carried along with the rainwater, the water is purified using a purification device. A retaining element is disposed behind the purification device in the direction of flow. This element is at least partially detachable connected to a base surface and can be used to release the through-flow in the region of the base surface of the purification device in an intermittent manner. The retaining element is pivotable around an axis.

Abstract: An oil-water separator for use in a trench, which surrounds an oilfield. The separator is positioned in the ground such that an inlet conduit extends at about the same level as the bottom of the trench. The trench water is admitted into the housing, where it contacts a plurality of buoyant oil-absorbing members, causing the oil particles to adhere to the surface of the oil-absorbing members. An outlet conduit located downstream from the oil-absorbing members is connectable to a pump to cause the oil-free water to be pumped from the housing and diverted away from the trench.

Abstract: A stormwater filtration system includes a stormwater containment structure including a bottom surface, an inlet that receives stormwater and an outlet through which filtered stormwater exits the stormwater containment structure. A flow structure is at the bottom surface. The flow structure includes a conveyance conduit running along the bottom surface of the stormwater containment structure and in fluid communication with the outlet of the stormwater containment structure. The conveyance conduit includes a port extending through a sidewall of the conveyance conduit. A saddle includes an upper component and a lower component connected to the upper component such that the upper and lower components straddle the conveyance conduit at the port. The upper component includes an opening in communication with the port and the lower component supports the conveyance conduit above the bottom surface.

Abstract: A gutter debris cover having an elongated screening element with openings for fluid flow therethrough. Attachment members are provided on either edge of the screening element, with each attachment member having a cross-sectional configuration. In one form, the cross-sectional configurations are mirror images of one another and are generally recurved to connect to gutter elements. In another form of the invention, only the second or rear cross sectional configuration is recurved.

Abstract: A debris-filtering downspout and other water runoff conduits and receptacles are disclosed, and include a screen mounted within a conduit, a culvert, a storm water conveyance or secured to a water collection basin. The screen provides high water throughput and is self-cleaning while effectively filtering debris contained in an incoming water stream. Optionally, media pads may be included to further scrub the water before it exits the downspout assembly.

Abstract: A method of removing solids from the slurry at a construction site located on or near a stream in order to improve the quality of water discharged into the stream by forming treatment zones for receiving slurry, said zones comprising walls of filter bags and floors of filter skirts, said bags and skirts comprising geotextile material and the bags being filled with a shredded rubber and woodchip combination.

Abstract: A bottom seal, at the lower end of a step screen, is adapted to convey solid particles and other objects positioned in flowing water. The step screen has a grating including alternately fixed and movable lamellar rods with intermediate gaps to allow the water to pass through the grating. The bottom seal extends substantially across the entire width of the grating to seal the ducts that arise between the fixed lamellar rods at their lowermost step as the movable lamellar rods move upwards between the fixed lamellar rods. The bottom seal includes an elongate bottom cover, which at its longitudinal edge upstream is, via hinges, pivotally connected to the step screen via a bottom step upstream of the bottom cover.

Abstract: A filter for use in a storm water drain to prevent debris from reaching the outlet of the drain. The filter is adjustable to be sized for a range of flow capacities. The filter includes a main filter section having openings through which water flows. A pair of adjustable side grates project from the main filter section and are adaptive to be connected to the sidewall of a storm drain. Flow capacity of the filter can be varied by adjusting the effective width of the respective side grates.

Abstract: A protection device for a side entry pit, device having a frame to clamp to the exposed edge of the cover of the pit, and a screen of chains attached to the frame and extending beneath the opening of the pit to prevent trash from entering the pit. The protection device also includes a screen to prevent debris such as dirt and gravel entering the pit, the device including a wire mesh supporting a material such as filter foam to prevent the debris entering the pit, while permitting the passage of water therethrough.

Abstract: A stormwater filtration system includes a stormwater containment structure including a concrete floor and a pre-assembled flow structure embedded in the concrete floor. The pre-assembled flow structure includes an inlet compartment housing, an outlet compartment housing and at least one filter conduit positioned between the inlet compartment housing and the outlet compartment housing and in flow communication with the interior of the outlet compartment housing. At least one bypass conduit extends from the inlet compartment housing to the outlet compartment housing for delivering water from the interior of the inlet compartment housing to the interior of the outlet compartment housing. A plurality of filter units are connected to the filter conduit so that stormwater filtered by the filter units passes into the filter conduit and then to the interior of the outlet compartment housing.

Abstract: The present invention relates to an apparatus for maximizing the blockage of fluid borne solid materials from passage through a catch basin into the downstream parts of a fluid flow channel, with minimum impact on the volume and rate of fluid passing through the channel. The apparatus comprises at least one filter sheet secured within the catch basin at a location above and covering a large proportion of the floor of the catch basin, an overflow wall separating the filter area from an unfiltered overflow area, and a diverter for directing incoming trash away from the overflow area and to the filter side of the overflow wall. Although the apparatus covers a large area within the catch basin, the overflow wall, overflow area, and clearance between the filter sheet(s) and the floor provide sufficient space for fluid and excess trash to pass in the event the capacity of the apparatus for holding them is exceeded.

Abstract: An apparatus for bio-composting domestic waste from residential dwellings, comprised of a tank, a multi-chambered liner and a separator. Domestic waste influent enters one end of a sluice, which has ribs on its surface directing the influent onto the upper section of an inclined sieve. The inclined sieve is angled downward and is permeable. The influent waste flows down the inclined sieve, and free water drops downward through the sieve while separated waste solids slide off the lower edge of the inclined sieve. The multi-chambered liner is set inside the tank under its lid. The multi-chambered liner is partitioned into a first chamber running the length of the liner on one half its wide, which the other half its width is subdivided into a series of smaller sub-chambers running the length of the liner. The chambers are separated by permeable partitions. The walls of the liner are permeable, as well.

Abstract: An oil-water separator for use in a trench, which surrounds an oilfield. The separator is positioned in the ground such that an inlet conduit extends at about the same level as the bottom of the trench. The trench water is admitted into the housing, where it contacts a plurality of buoyant oil-absorbing members, causing the oil particles to adhere to the surface of the oil-absorbing members. An outlet conduit located downstream from the oil-absorbing members is connectable to a pump to cause the oil-free water to be pumped from the housing and diverted away from the trench.

Abstract: Disclosed herein is an elliptical motion drive device for use in a step screen. The elliptical motion drive device comprises first and second eccentric wheels coupled to a single drive shaft to be eccentrically positioned to each other. Upon rotation of the drive shaft, the first and second eccentric wheels rotate and move along guide rails formed in different directions from each other to transversely and longitudinally rotate movable lattice plates connected to a movable frame of the step screen, thereby achieving elliptical motion of the movable lattice plates.

Abstract: The gross pollution trap comprises an upper inlet portion directing stormwater through a filter inlet aperture to a filter chamber defining a filter flow path. The filter chamber is positioned in a lower portion of the trap. A filter is positioned in the filter flow path to collect debris from water flowing through the flow path. An outlet leads from the lower portion of the trap and in use is connected with a stormwater egress pipe. An overflow weir is locate in the upper portion of the trap is spaced above the filter inlet aperture, an water flowing over the weir spill into an overflow path ending at the outlet. The weir preferably has a return extending upstream from an upper portion of the overflow weir.

Abstract: A wastewater treatment system for treating excess wastewater from a sewer system includes a container having first and second portions adapted to receive excess wastewater from the sewer system, and a generally horizontally oriented screen arrangement disposed in the second portion of the container. The system further includes a treating agent dispenser for introducing a treating agent into the wastewater, and an effluent passage in fluid communication with the second portion of the container. During a sufficient rain event, the wastewater flows from the sewer system into the container, through the screen arrangement, and then into the effluent passage, such that the wastewater flows generally in a first direction through the first portion of the container, then generally in a second direction different than the first direction through the second portion of the container.