Abstract: A single stage clarifier mixing assembly includes a housing having a circular sidewall and a center axis, a mixing section in the housing, a clarifier section overlying and axially aligned with the mixing section along the center axis within the housing, an inlet delivering an inlet stream to the mixing section and an agitator. The agitator is adapted for mixing the inlet stream in the mixing chamber.

Abstract: The cubical support for a foot valve is configured for use with a foot valve. The cubical support for a foot valve is an openwork framework structure. The cubical support for a foot valve elevates the foot valve above the bed of a body of water. The framework structure forms a protected space around the foot valve. The openwork structure allows for the free flow of water. The cubical support for a foot valve comprises a plurality of pipes, a plurality of tee connectors, a plurality of 90-degree elbow tees, and an adhesive. The plurality of tee connectors and the plurality of 90-degree elbow tees assemble the plurality of pipes into the framework structure. The adhesive secures each congruent end of each pipe selected from the plurality of pipes to a fitting selected from the group consisting of the plurality of tee connectors, and the plurality of 90-degree elbow tees.

Abstract: A through-floor combination tub and surface drain includes an exterior tube having a top end and a bottom end. The bottom end of the exterior tube is to connect to a sewer pipe. The top end of the exterior tube has one or more openings to provide a floor drain. The drain also includes an interior tube situated within the exterior tube. The interior tube has a top end to receive a drain pipe and a bottom end that opens into a cavity within the exterior tube that extends from the top end of the exterior tube to the bottom end of the exterior tube. The drain further includes a flange, extending outward radially from the exterior tube, to connect to a substrate of a floor.

Abstract: A method of removing sediment from fluid flow within a storm water drain pit by deflecting flow entering the pit towards the side walls of the pit by one or more deflectors. This reduces the energy of the fluid flow and promotes settling of sediment within the catch pit. Each deflector is preferably of a concave form and may be located in a storm water drain pit bag or suspended. A removable catch basin receptacle for a storm water drain pit includes a container has a low flow outlet defining a fluid path for fluid at a first level within the container to a second level, higher than the first level, outside the container. An overflow path provides a fluid flow path out of the container at a level higher than the first or second level.

Abstract: An inlet filter and method of use are disclosed. In one aspect, the inlet filter comprises a frame, filter material, a feed stream inlet, and a filtrate outlet. The frame is configured so an exterior of the frame is shaped like a wedge. The frame comprises a thick portion and a narrow portion opposite the thick portion. The thick portion of the frame comprises the feed stream inlet. The filter material is positioned along a bottom surface of the frame and a portion of an upper surface of the frame that is opposite the feed stream inlet in the narrow portion of the frame. In another aspect, the method comprises inserting an inlet filter into a storm sewer inlet. The inlet filter can be one of a plurality of inlet filters inserted into the storm sewer inlet, the filters cooperating to filter a feed stream entering the storm sewer inlet.

Abstract: A system is provided for covering a launder channel of a clarifier tank, the launder channel having a tank wall and launder channel wall. The system comprises a mounting section connected to the launder channel wall, a hinge, and an openable cover panel, movable between a closed and open position. The mounting section includes an angled resting structure for supporting the cover panel, when in the open position, away from the mounting section.

Abstract: The invention relates to a method for clarification of raw green liquor in a sedimentation tank. According to the invention is a part of dregs separated in the sedimentation tank recirculated back into the inflow of raw green liquor, and preferably after passing the dregs through at least one turbulence generator (30, 31) that could break up larger dregs particles into smaller dregs particles, and thus create larger total surface on the dregs particles, improving sedimentation rate in the sedimentation tank. In a preferred embodiment is the recirculated dregs added into the flow of raw green liquor before a flocculant is added into the flow of raw green liquor and mixed recirculated dregs.

Abstract: A separator vessel has inlet, fluid outlet, and sand outlet ports. Each of the fluid and sand outlet ports are spaced below the inlet port. The separator has an enclosure between the inlet and fluid outlet ports. The enclosure redirects the fluid stream and defines an inner cavity above a lower edge of the enclosure, the lower edge defining a liquid flow area. The separator has one or more vanes extending along an outer surface of the enclosure which redirect the fluid stream along a curved flow path as the fluid stream flows toward the lower edge, and a plurality of apertures adjacent to the vanes, the apertures permitting fluid flow into the inner cavity of the enclosure. The fluid outlet port is disposed within the inner cavity above the lower edge of the enclosure and below one or more apertures.

Abstract: A side-flushing mechanical filter system includes a spring positioned within a pipe and a plurality of plates attached to the spring, each plate defining at least one hole, and a rod positioned partially within the pipe, a proximal end of the rod attached to a distal-most plate and a distal portion of rod extending from the distal end of the pipe. A major face of each plate is configured to arrest sediment from water flowing into the pipe via a first water inlet while the holes defined by the plates enable filtered water to flow therethrough and out of the first water outlet when the first water inlet and first water outlet are opened. During cleaning of sediment, graywater flows into the pipe via the second water inlet and over the plates while a user moves the rod to dislodge sediment from the plates and toward an outlet.

Abstract: An assembly for diffusing gas from a first slurry having an open-bottomed housing having an opening for conveying a second slurry from inside of the housing to outside of the housing. The assembly includes one or more intake conduits extending through an upper mid-portion of the housing for receiving the first slurry, and a gas diffusing channel formed in the housing for conveying diffused gas from the liquid from inside of the housing to outside of the housing. The assembly includes a dumping assembly having a dump valve used to convey fluid from an upper layer of fluid located inside of the housing to outside of the housing. The assembly may include a recirculation pump and a suction conduit coupled to the pump for pumping fluid (dyed fluid) from inside of the housing. The assembly is configured to be partially submerged in liquid, such as in a tank.

Abstract: A sedimentation device for material which is contained in fluid, in particular rainwater, includes a sedimentation insert (12) which in the position of use is inserted into a shaft element (12), wherein the sedimentation insert (12) includes a run-in chamber, said run-in chamber being delimited by a run-in chamber side wall (20) which provided with a lateral run-in opening (19) and on its lower side having an outlet opening (23), wherein a flow-breaking device (24) for breaking the flow of a fluid flow which is produced in a throughflow direction (26) between the run-in opening (19) and a run-out opening (25) is assigned to the outlet opening (23), and wherein the sedimentation insert includes a run-out chamber (32) which annularly surrounds the run-in chamber (18) and which is delimited by an inner run-out chamber side wall, a base (33) and an outer run-out chamber side wall (34), wherein the run-out opening (25) is formed on the delimitation of the run-out chamber (32) and wherein the outer run-out chamber

Abstract: A modular room includes a floor having an upper surface, and a lower surface. The floor defines a floor height between the upper surface and the lower surface, and the floor defines a through aperture. At least three walls have a lower end connected to the floor and an upper end extend away from the floor, a ceiling is connected to the upper end of the walls, and a drain body is positioned in the floor aperture. The drain body has an upper surface and a lower surface and defines a drain body height between the upper and lower surfaces. The drain body height is less than the floor height, such that the drain body does not extend above the upper surface of the floor or below the lower surface of the flow while the drain body is positioned in the aperture in the floor.

Abstract: A tensile structure density current baffle for use in a clarifier tank having a side wall includes a tensioning cable and a central baffle portion formed from a membrane fabric. The central baffle portion has an upper baffle portion with an upper end, a lower baffle portion with a lower end, and a junction between the upper baffle portion and the lower baffle portion. The tensioning cable engages the central baffle portion at the junction. The upper end of the central baffle portion being fastenable to the side wall above the junction and the lower end of the central baffle portion being fastenable to the side wall below the junction. When the upper end and lower end are fastened to the side wall and the tensioning cable is tensioned, the tensioning cable and membrane fabric comprise a self-supporting tensile structure that extends toward the center of the clarifier tank.

Abstract: The disclosure provides a filtering device comprising a housing, a blocking member and a screening member. The housing includes a body, an inlet end and an outlet end. The housing forms an accommodation space. The inlet end and the outlet end are respectively formed at two ends of the accommodating space. The inlet end is capable of receiving fluid. The blocking member is capable of splitting the fluid into a plurality of fluids and collecting the non-fluid composition of the secondary fluid having a first size. The screening member is disposed between the inlet end and the blocking member, and the screening member is configured to receive the secondary fluid to limit the non-fluid composition having a second size of the secondary fluid to the screening member. After the secondary fluid passes through the shield and the screening member, the secondary fluid is output from the outlet end.

Abstract: An improved clarifier tank having a rake arm assembly with one or more rake arms, a rake arm driveshaft operatively connected to the rake arms and a rake arm drive, and a sump scraper driveshaft, operatively connected to a plurality of sump scrapers and a sump scraper drive.

Abstract: A settling basin of a wastewater treatment system includes a collector chain including chain links having a plurality of side bars, stepped connecting pins configured to join the plurality of side bars and including a first end including a head portion having a cross-sectional area larger than portions of the plurality of side bars through which the stepped connecting pin extends, end caps configured to receive second ends of the stepped connecting pins, and apertures defined in the end caps and second ends of the stepped connecting pins configured to receive a retaining element that holds the end caps in position on the second ends of the stepped connecting pins.

Abstract: A grease trap or solids collector for separating waste from waste water has a tank having a multilayer outer wall made of an outer layer of un-foamed plastic, an intermediate layer of foamed plastic, and an inner layer of unfoamed plastic; an inlet invert in the tank for receiving incoming waste water; and an outlet invert for removing water from the tank. An extension collar made up of segments can be included.

Abstract: A drain protector having a flexible adsorbent pad, a raised insert, and a cover is described. The pad and the insert each includes aligned apertures. The raised insert is positioned over the flexible adsorbent pad or within the aperture of the flexible adsorbent pad. The cover is connected to the flexible adsorbent pad, a raised insert, forming a space over the insert. The drain protector is made from adsorbent material for blocking sediment, collecting contaminants and filtering water into a drain. The cover of the drain protector reinforces the sheet and insert to protect against damage from traffic over the drain protector.

Abstract: An in-line grease interceptor assembly adapted to separate fat, oil, and grease (FOG) out from wastewater mixed with FOG. The assembly has an inlet for receiving wastewater mixed with FOG, an outlet for discharging wastewater after at least some FOG has been separated out from the wastewater, and a chamber hydraulically located between the inlet and the outlet. The chamber has lateral sides, a floor, and an open top, and is adapted to maintain the mixed wastewater in the chamber at a predetermined liquid level located below the open top while accumulating the separated FOG in a layer above the predetermined liquid level. An auxiliary baffle is positioned inside the chamber, extending from a downstream end toward an upstream end of the chamber, between the floor and the open top. The auxiliary baffle has a downstream end, an upstream end, and lateral sides, and defines a first separation section above the auxiliary baffle, and a second separation section below the auxiliary baffle.

Abstract: The present disclosure relates to a sludge collector including: a plurality of flights collecting sludge in a settling basin; a chain connected to the plurality of flights to move the flights; and an attachment-integrated roller unit detachably coupled to an attachment connected to the flights, and preventing the flights from being reversed when the flights are operated.