Abstract: Rake systems for cleaning water streams and new and novel components for such rake systems.

Abstract: Apparatus for removing debris from channeled water that includes a bar screen assembly. The assembly includes a plurality of spaced apart screen bars, each bar having an upstream edge and a downstream edge and distal ends to which U-shaped clips are attached. Each of the clips has a bar engaging portion and a cross member engaging portion that attaches to an associated cross member. The clips operate to space the trailing edge of the screen bars a predetermined distance from associated cross members and allow easy replacement of a bar. A continuous conveyor carries a plurality of rakes having a plurality of spaced apart tines which are adapted to fit between the screen bars as the rake is moved along the bars by the conveyor. The tines of the rake have a length that substantially spans the distance between the leading edge and trailing edge of a bar, so that tips of the rake tines extend to at least the trailing edge of an associated bar.

Abstract: A device for separating and lifting solids from waste water has a stationary drum provided with a first filter screen and a screw conveyor. An auger shaft has a lower portion located inside the stationary drum, which is partially surrounded by a second filter screen. The lower portion is connected to a cleaning apparatus of the first filter screen formed by a plurality of comb-holder arms mounted on a cross shaped element. The comb-holder arms are integral at the opposite end to an anti-skid ring sliding in a sliding seat integral with the support frame. Each comb-holder arm has an elongated comb facing the first filter screen and in contact with the first filter screen. The comb-holder arms are connected to the auger shaft by an epicyclic secondary gear.

Abstract: In a hollow cylindrical housing which stores a coolant, a feeding device having a rotating shaft and spiral screw vanes fixedly installed on the periphery of the rotating shaft is provided. At least one first diffusion nozzle is provided in each pitch of the screw vanes on the inner wall of the housing. A pair of second diffusion nozzles are provided for every pitch of the screw vanes on the outer periphery of the rotating shaft respectively at different positions in the axial direction of the rotating shaft and at mutually opposite positions in the circumferential direction of the rotating shaft. The first diffusion nozzles are supplied with wash water through a high-temperature water piping provided on the upper outside of the housing, while the second diffusion nozzles are supplied with wash water through a channel formed in the interior of the rotating shaft.

Abstract: The disclosure relates to a self-actuating debris removal or disruption device for use on a punch plate or other like water screening instrument.

Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.

Abstract: A method of creating customized beverage products includes providing a multiple stream filing system suited for producing an array of beverage products. The method also includes receiving an order for a customized beverage product from the array of beverage products. The order indicates at least one characteristic of the customized beverage product. The at least one characteristic comprises one or more of the following: a beverage formulation, a beverage additive, a package size, a package shape, or label content. The method further includes instructing the multiple stream filling system to produce the customized beverage product. The multiple stream filing system produces the customized beverage product without performing an operation to reduce contamination of the customized beverage product with ingredients from a previously produced beverage product.

Abstract: A gripper device comprises a gripper with a gripper arm rotatable around a rotation axis such that the gripper is movable between an open end position and a closed end position, and a hoisting device connected to the gripper and comprising a first cable and a second cable which are each connected with their one outer end to the gripper and are each connected with their other outer end to respectively a first and second hoisting means for raising and lowering the gripper with the cables, wherein each hoisting means is, driven by a separate drive, wherein a controller transmits the same control signal to both drives for the purpose of raising or lowering the gripper, and each drive comprises a motor with internal slippage or a slippage coupling so that synchronous running of the hoisting means is automatically realized.

Abstract: There is disclosed a trash rake system for use in clearing debris from an intake screen of an intake trash rack of a water intake port of a water use facility. The intake screen is configured to collect debris transported by water, for example, a river, to prevent the debris from entering the intake port of the water use facility. The trash rake system includes a track system, a movable support structure, a rack and pinion drive mechanism, and a controller configured to receive signals from an encoder on a drive motor and a proximity sensor system.

Abstract: A system is provided for collecting cellular material from fish for subsequent DNA analysis. A channel includes a sample collection zone. A fluid ejector is directed into the sample collection zone. A fluid collector is communicated with the sample collection zone. A controller is configured to coordinate ejection of a fluid jet from the fluid ejector and collection of a fluid sample by the fluid collector. The fluid jet dislodges cellular material such as scales and mucous from the fish. The fluid collector collects that cellular material in a fluid sample for subsequent DNA analysis.

Abstract: A desalination system (100) having an intake unit (110) providing seawater to a pre-treatment unit (120) connected to a reverse osmosis (RO) desalination unit (130) and a post treatment unit (150). The desalination system (100) is configured to operate without any external addition of chemicals to simplify logistics and regulation concerns. The units of the system are configured to prevent biofouling, scaling and corrosion by mechanical and biological means including high flow speeds, biological flocculation of colloids, and making the water entering the RO units inhospitable to bacteria and other organisms that cause biofouling, hence preventing their settlement and removing them with the brine. Recovery rate is lowered and energy is recovered to increase the energetic efficiency and minerals that are added to the product water are taken from the brine.

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: 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: A method for transferring heat includes flowing a wastewater through a tank and flowing a fluid through a heat exchanger having an outer surface. The method further includes aerating the wastewater to produce a convective flow, contacting the outer surface of the heat exchanger with the convective flow to exchange heat, and cleaning the outer surface of the heat exchanger with the convective flow. A system for transferring heat includes a tank, a heat exchanger with an outer surface disposed in the tank, and a fluid flowing through the heat exchanger. Wastewater located in the tank flows over the outer surface of the heat exchanger, and a diffusion pipe disposed in the tank provides air into the tank to produce a convective flow in the wastewater.

Abstract: The present invention relates to a membrane separation method and a relevant equipment, in particular to a method and an equipment for membrane separation utilizing concentration polarization during membrane filtration process, especially, to a concentration process and equipment and a drawer special for drawing a concentration polarization layer. The direct removal of the concentration polarization layer from membrane surface not only decreases the adverse influence of concentration polarization on membrane separation but also obtains concentrated retention components, thereby significantly improving the ability to maintain membrane flux, solving the twinborn problems concerning concentration polarization and membrane fouling during the membrane separation process, and achieving a high-efficiency concentration for retention components.

Abstract: Water intake structures for power plants and other industrial facilities may include an inflow channel, a deep well, an outflow channel, and an intake channel These structures may include a fish screen, such as a wedge-wire screen or the like, positioned between the deep well and the intake channel to separate fish, fish larvae and fish eggs from water supplied to the intake channel from the deep well. These structures may further include one or more circulating or sweep flow pumps positioned proximate an outlet of the outflow channel. The sweep flow pumps may be used to maintain a sweep flow through the deep well of the intake structure to help sweep fish, fish larvae and fish eggs away from the fish screen and into the outflow channel.

Abstract: The invention relates in general to weed and trash screening apparatus for irrigation systems. In one embodiment a debris screening apparatus is provided for use adjacent a check structure in a canal having a flow of water. The preferred apparatus comprises a frame substantially open to the flow of water and adapted to abut the check structure and a screen having at least one face with a plurality of pleats. The screen is mounted within the frame and, during operation, a first portion of the screen is submerged within the water, a second portion of the screen is above the water and a portion of water in the canal is directed through the screen. Screen face cleaning means are operable to periodically clean debris off of the screen's at least one face.

Abstract: The present invention relates to a membrane separation method and a relevant equipment, in particular to a method and an equipment for membrane separation utilizing concentration polarization during membrane filtration process, especially, to a concentration process and equipment and a drawer special for drawing a concentration polarization layer. The direct removal of the concentration polarization layer from membrane surface not only decreases the adverse influence of concentration polarization on membrane separation but also obtains concentrated retention components, thereby significantly improving the ability to maintain membrane flux, solving the twinborn problems concerning concentration polarization and membrane fouling during the membrane separation process, and achieving a high-efficiency concentration for retention components.

Abstract: A protective sleeve for use with metal intake racks used for screening debris from water intakes and other similar structures. The proactive sleeve may be made from a plastic material, such as HDPE, using an extrusion process. The sleeve is designed to snap into place over the metal blades of a bar rack, and to provide a positive and secure fit when in place. The protective sleeve thus provides the benefits of non-metallic intake racks to existing and future metal rack systems, without requiring replacement of existing metal racks.

Abstract: A screen cleaning apparatus for use, for example, in connection with a discharge conduit of a sewage pumping station, may include a housing, a screen, a rake and a float. The housing may operate to contain a fluid (and/or define a container for the other components) and include a fluid inlet and a fluid outlet. The screen may be positioned in the housing and define one or more apertures. The rake may also be positioned in the housing and have one or more protrusions, with each protrusion extending into a respective aperture in the screen. The float may apply a force to the rake so that the rake moves relative to the screen and in dependence upon variations of a volume of fluid received in the housing. Accordingly, the rake may rise and fall will the fluid level to remove debris from the screen.

Abstract: A screening device for wastewater includes a perforate screening member through which wastewater in an associated channel flows from a bottom side thereof to a top side thereof. An overfall wall is positioned in the wastewater channel. A clearing member is shiftable relative to the screening member for cleaning screenings therefrom, and is positioned upstream of the overfall wall. A waterwheel is positioned in the wastewater channel at a location downstream of the overfall wall, and is operably connected with the clearing member for mechanically shifting the same to remove the screenings from the screening member without using external power.

Abstract: A wastewater screening device includes a perforate screening member through which wastewater flows, including a plurality of laterally spaced apart screening rods interconnected by cross members, such that solids in the wastewater are captured by the screening member. A plurality of wiping elements are positioned between the screening rods and shift longitudinally to clear screenings from the screening member. Each of the wiping elements has at least one end projection disposed laterally between opposite sides of the screening member, and a tapered wiping surface.

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 screening device for wastewater overflow weirs and the like includes a perforate screening member through which wastewater flows from a bottom to top sides thereof, with a frame and a plurality of screening rods arranged in a laterally spaced apart, mutually parallel relationship. The opposite ends of the screening rods are fixedly connected with the frame to capture solids in the wastewater. The screening rods are each configured with narrow portions at the opposite ends.

Abstract: A support plate is used in a cog rake bar screen of a wastewater treatment facility and the cog rake bar screen includes an adjustable pin rack system coupled to a frame. The support plate includes a plate having a centerline extending between opposite side walls of the plate. The plate includes a fastener hole for receiving a fastener to couple the plate to the pin rack system and the frame. A set screw is connected to the plate for adjusting position of the plate relative to the frame and thereby adjusting position of the pin rack system.

Abstract: A sample concentrator for concentrating analytes in a solvent-containing liquid sample stream, including concentrator housing having a sample stream flow channel and a gas stream flow channel having an inlet and an outlet, a heater for gas in the gas stream conduit, and a hydrophilic ion exchange or non-ionic membrane barrier separating said gas stream flow channel and said sample stream flow channel. Solvent is evaporated from the liquid sample stream in said sample stream flow channel in or at the interface with said membrane, when the gas stream is at an elevated temperature. A regeneration step is used to regenerate the ion exchange membrane barrier.

Abstract: A protective sleeve for use with metal intake racks used for screening debris from water intakes and other similar structures. The proactive sleeve may be made from a plastic material, such as HDPE, using an extrusion process. The sleeve is designed to snap into place over the metal blades of a bar rack, and to provide a positive and secure fit when in place. The protective sleeve thus provides the benefits of non-metallic intake racks to existing and future metal rack systems, without requiring replacement of existing metal racks.

Abstract: A powered trash rake system for clearing debris from intake racks used for screening debris from water intakes and other similar structures. The trash rake system includes a telescoping boom mounted to a movable carriage support structure. Electric motors are provided to move the carriage support structure to desired positions along the intake rack to be cleaned and to operate the telescoping boom to move a trash rake structure under power vertically along the trash rack to remove debris therefrom.

Abstract: Water intake structures for power plants and other industrial facilities may include an inflow channel, a deep well, an outflow channel, and an intake channel These structures may include a fish screen, such as a wedge-wire screen or the like, positioned between the deep well and the intake channel to separate fish, fish larvae and fish eggs from water supplied to the intake channel from the deep well. These structures may further include one or more circulating or sweep flow pumps positioned proximate an outlet of the outflow channel. The sweep flow pumps may be used to maintain a sweep flow through the deep well of the intake structure to help sweep fish, fish larvae and fish eggs away from the fish screen and into the outflow channel.

Abstract: An apparatus and method are provided that enable the control of a screening operation based on a calculated screen blockage percentage and the velocity throughput of the screen. The apparatus includes an upstream level detector, a downstream level detector and a flow determining device which determines the volumetric flow through the screen. The apparatus may further include a blockage determination unit which determines the percent screen blockage based on the flow level upstream of the screen, the flow level downstream of the screen and the volumetric flow.

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: A gutter member includes an inlet operatively coupled to a gutter trough. The inlet is configured to receive matter such as water and non-water matter from the gutter trough. The gutter member further includes an outlet operatively coupled to a top of a downspout. The outlet is configured to pass water to the downspout. The gutter member further includes a reservoir configured to collect non-water matter. The reservoir is located between the inlet and the outlet and is lower than the gutter trough relative to the earth. The reservoir includes an exit port door configured to move between a first position in which a substantial amount of the non-water matter is retained in the reservoir and a second position in which the non-water matter is released from the reservoir.

Abstract: Provided is a rotary bar screen device. The device includes a driving motor, an up/down pair of driving and driven sprockets, left and right transfer chains, a plurality of screen buckets, a removal unit, and a slide plate. The driving motor is provided over a support frame, and transmits a driving force. The driving and driven sprockets are driven by the driving force. The left and right transfer chains connect the driving and driven sprockets with each other while circulatively moving. The plurality of screen buckets are provided between the left and right transfer chains. The removal unit is provided between the left and right driving sprockets. The slide plate guides the foreign materials dropping from the screen buckets.

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: Disclosed is a fine-screened grid having a screening grate. A slider is guided on the grid grate to remove debris therefrom. The slider is connected to a slider arm which, together with a guide lever, forms a knee lever. The configuration enables the slider to pass over large or heavy objects because it can be moved away from the screening grate as a result of the geometry and kinematics of the knee lever. The system can operate continuously without monitoring, because larger particles which cannot be carried by the slider and which collect at the beginning of the screening grate can be removed when convenient. Rinsing nozzles, which are disposed on the upper end of the screening grate, are provided in order to improve the transfer of retained particles from the slider to a capturing groove.

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: A method of removing solid matter from liquid using two or more sets of screening devices installed in series. Each set of screening devices consists of one or more identical or nearly identical screening devices. Each downstream set of screening devices has smaller openings than the preceding upstream set of screening devices. Solid matter collected by the screening devices is automatically discharged onto two or more conveyor systems that deposit the material onto one or more central collection areas for final removal and disposal. The present invention uses screening devices in a special configuration to achieve enhanced removal of solid matter from liquid (i.e. a series installation with screen opening size decreasing in a downstream direction).

Abstract: An apparatus serves for removing fine material to be screened from waste water. The apparatus includes a sieve grate (6) and a detaching device (16). The sieve grate (6) is cylindrical, and it is rotatingly driven. The sieve grate (6) allows for waste water to flow from its interior towards its exterior. The sieve grate (6) includes a supporting body (13) and a mesh sieve (7). The supporting body (13) is located at the exterior of the sieve grate (6). The supporting body (13) is made of a perforated sheet metal including comparatively large openings (37). The supporting body (13) provides for resistance and stability of the sieve grate (6). The mesh sieve (7) is located in the interior of the sieve grate (6). The mesh sieve (7) forms a separation surface (14) for the material to be screened. The mesh sieve (7) includes meshes of a comparatively small size. The mesh sieve (7) is fixedly connected to the supporting body (13). The detaching device (16) is arranged outside of the sieve grate (6).

Abstract: There is disclosed an apparatus for removing solids from water in a canal during or immediately after a rainstorm. The apparatus includes a plurality of filters and a carrier. The filters filter the solids from the water while moving in and taking impact from the water. The carrier carries the filters in a cycle.

Abstract: The water intake rotary screen comprises a mobile filter designed as an endless loop formed of a succession of flexible and articulated filter panels. It is associated with a suction system adapted to generate a local contraflow through the filter to take up successively elements retained thereby and direct them to the exterior.

Abstract: A traveling water screen comprising an endless foraminous belt with flights. The foraminous belt forms a water screen extending from a lower end in a flowing stream to an upper end above the surface of the stream. The stream flows through openings in the foraminous screen. The flights, which may be scoops, are arranged in spaced apart relation on the outer surface of the water screen. The water screen is driven in a direction so that its upstream portion advances upward and its downstream portion downward. The flights form inclined surfaces across the width of the screen from a point of highest elevation to one or more points of lowest elevation at one or both side edges of the screen. As the screen moves, the flights lift fish toward the surface. As a flight breaks the surface, fish slide down the inclined flights toward one or both side edges of the screen to be diverted safely.

Abstract: A water intake screen with a filter panel includes a frame adapted to be connected to the water intake and a circular filter panel disposed transversely in an opening of the frame, to which it is fastened. The panel includes a wheel extending in a substantially vertical plane between a lower position and an upper position and having radial retaining members on the upstream side of the panel and attached thereto, an aspiration device on the upstream side of the retaining members, and elements for driving the panel and/or aspiration device with a rotary relative movement so as to generate locally through the panel a successive counterflow at each retaining member in accordance with the rotary relative movement in order to take up successively debris and particles retained thereby and to direct them through an evacuation pipe adapted to evacuate the debris and particles to the exterior.

Abstract: An apparatus for removing material from a liquid flowing through a channel includes a sieve grate, a screw conveyor and a detaching device. The sieve grate has an inflow side, an inner side and an outer side. The sieve grate is designed to be cylindrical and to be rotatably driven. The sieve grate is arranged at an inclined orientation to be partially submerged in the liquid. The sieve grate at the inflow side includes an open face. The sieve grate at the inner side includes a plurality of guide plates. The sieve grate includes a shaping carrier element. The sieve grate includes a mesh fabric, the mesh fabric being designed and arranged to form a separation surface for the material. The screw conveyor includes a housing. The screw conveyor includes a driven conveying screw. The screw conveyor is coaxially arranged with respect to the sieve grate.

Abstract: A drive system for driving a screen in a fluid screening system comprises a hydraulic or pneumatic motor coupled to a drive shaft of the screen. The system is sized to provide the torque required to drive the screen throughout-the desired speed range, as well as providing additional torque as required to free lodged solids from the screen field. The hydraulic motor provides overload protection when lodged solids block the rotating rake bar. The drive system operates up to a predetermined pressure value before the overload protection is activated. The drive system may be operated in either a manual mode or an automatic mode.

Abstract: The invention is directed to a system for removing waste material from a fluid flowing in a channel. This system may incorporate the use of a trap for collecting the waste material while allowing the fluid to pass; a rake for removing the waste material away from the trap; a drive assembly for moving the rake to remove the waste material; a prime mover for operating the drive assembly; and a variable speed controller configured for operating the prime mover over a variable range of speeds.

Abstract: A debris separating apparatus for use in downspout below an eaves trough comprises a main housing having a water and debris inlet, a water outlet, and a debris outlet. A debris deflector mounted within the main housing between the water and debris inlet and the water outlet is sloped downwardly towards the debris outlet and has a plurality of parallel slots that permit water to pass from the water and debris inlet to the water outlet. A rotatable debris ejecting member has outwardly projecting fingers and water receiving receptacles mounted on the fingers. The debris ejecting member is rotatably mounted within the main housing beneath the debris deflector such that the outwardly projecting fingers project through the slots in the debris deflector and such that the outwardly projecting fingers travel along the slots in the debris deflector as the debris ejecting member rotates, to thereby eject debris accumulated on the top of the debris deflector.

Abstract: A device for separating debris and other material from rainwater as it flows into a downpipe from a roof gutter is disclosed. The device has a compartment for fitting to the upper end of a downpipe. The compartment has a horizontally pivoted perforated drum which rotates when rainwater and entrained debris from an overhead gutter impinges on it such that the rainwater passes through the perforations in the drum into the associated downpipe and the debris is ejected outside of the device by the rotation of the drum.

Abstract: An automatic debris removal system for screening an effluent stream. The automatic debris removal system comprises a support frame positioned proximate the effluent stream, a bucket positionably connected to the frame, and a camming system attached to the support frame and the bucket. The bucket includes a screening portion and is positionable within the effluent stream to screen and collect the debris. The bucket is positionable within the support frame, and upon raising the bucket past a selected position, the camming system causes the bucket to rotate and dump the debris held therein.

Abstract: An automatic screening apparatus for removing debris from a liquid stream includes a drive mechanism mounted to a support frame. A screen connects to the support frame and collects debris while allowing the liquid to flow through. The drive mechanism positions and interchangeably couples to a first carriage assembly and a second carriage assembly. The first carriage assembly includes a rake that removes the collected debris from the screen. The second carriage assembly includes a bucket that removes the debris collected from the rake. A plunger directs the debris from the rake into the bucket. At selected intervals, the drive mechanism decouples from the first carriage assembly and couples to the second carriage assembly, whereupon the second carriage assembly is positioned to dump the bucket. After dumping the bucket, the drive shaft is decoupled from the second carriage assembly and coupled to the first carriage assembly, whereupon the cycle is repeated.

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.