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 side wall (34) is designed as a spillway (38).

A clarifier can comprise a floor, inner and outer walls that each extends upwardly from the floor such that a tank is at least partially defined by the inner wall and a launder channel is at least partially defined between the inner and outer walls and is disposed along at least a majority of a periphery of the tank. A launder cover comprising one or more flexible sheets can be disposed over at least a majority of the launder channel. Each of the sheet(s) can have opposing inner and outer edges, the inner edge coupled to the inner wall and the outer edge coupled to the outer wall, and can be configured such that, when a single one of the inner and outer edges is decoupled from the inner and outer walls, the sheet is deformable to at least partially uncover the launder channel.

A bioreactor for a water treatment system includes a tank configured to receive an influent liquid, a separator structure positioned in the tank, the separator structure having a frustoconical shape and defining a downwardly-facing opening proximal to or at a bottom of the separator structure, an interior of the separator structure being in communication with the tank, external to the separator structure, at least via the opening, an aeration vent positioned proximal to a bottom of the tank and configured to direct air into the tank, but not directly into the interior of the separator structure, and an effluent outlet communicating with the interior of in the separator structure, proximal to a top of the separator structure, a relatively clean effluent liquid, in comparison to the influent liquid in the tank, exiting from the separator structure via the effluent outlet.

The invention relates to a waste water treatment plant including at least a multi-step water treatment reactor arranged for receiving influent waste water, for carrying out at least a biological step and a sedimentation step and for providing effluent pure water, by means of an effluent weir. The wastewater treatment plant further includes means for increasing the sedimentation velocity, and means for hindering floating elements to get into the effluent weir.

A turbid matter separating apparatus extracts turbid matter and a supernatant liquid separately from a suspension. The invention is directed to a turbid matter separating apparatus which includes a liquid container which includes a sediment discharge port and a supernatant liquid discharge port and is filled with a suspension containing turbid matter, a sediment valve which is provided in the sediment discharge port, a supernatant liquid valve which is provided in the supernatant liquid discharge port, an ultrasonic irradiator which irradiates the suspension filled in the liquid container with ultrasound, and a control unit which controls the sediment valve, the supernatant liquid valve, and the ultrasonic irradiator, the control unit being configured to control the sediment valve to discharge a sediment and controls a supernatant liquid valve to discharge a supernatant liquid after a predetermined time elapses since the irradiation with ultrasound by the ultrasonic irradiator is stopped.

A clarifier can comprise a floor, inner and outer walls that each extends upwardly from the floor such that a tank is at least partially defined by the inner wall and a launder channel is at least partially defined between the inner and outer walls and is disposed along at least a majority of a periphery of the tank. A launder cover comprising one or more flexible sheets can be disposed over at least a majority of the launder channel. Each of the sheet(s) can have opposing inner and outer edges, the inner edge coupled to the inner wall and the outer edge coupled to the outer wall, and can be configured such that, when a single one of the inner and outer edges is decoupled from the inner and outer walls, the sheet is deformable to at least partially uncover the launder channel.

A method, system, and apparatus directed to an innovative approach for the treatment of stormwater utilizing hydrodynamic separator assembly designed to maximize flow movement for more efficient sediment removal and maximize water flow control.

A waste water treatment apparatus includes a housing having a settling tank mounted therein, the settling tank adapted to receive waste water. A skimming device is mounted in the settling tank to remove any fats, oils, or grease (“FOG”) that settles on the surface of the waste water. A drain is provided in a downstream end of the settling tank for removing water from the settling tank. An inlet end of the drain is defined by a weir that controls the water level within the settling tank. A sediment removal system adapted to remove sediment collected in the bottom of the settling tank.

An installation for treating a wastewater effluent in a constant-level sequencing batch reactor (SBR), the SBR includes a chamber that is able to contain a mixture of wastewater and sludge comprising different levels, each level being defined by a concentration and/or a density of sludge, a sludge bed situated at the bottom of the chamber, a device for supplying the SBR with a volume of effluent to be treated close to the bottom of the chamber, in the sludge bed, preferably via a distribution network covering the bottom of the chamber, means for recovering a clarified fraction of the contents of the chamber, the SBR being able to implement a treatment method comprising a biological treatment reaction sequence comprising at least a step of aerating the contents of the chamber, during which the level of the surface of the mixture rises, a decanting step, during which sludge is deposited on the bottom of the chamber and the contents of the chamber are clarified close to the surface thereof, a step of recovering the clarified fraction of the contents of the chamber, the recovery step and supply step taking place simultaneously, so as to keep the level of the contents of the chamber substantially constant during the recovery step and supply step, the installation also comprising control means and recovery means.

A floating liquid intake for a liquid suction removal system, the liquid intake comprising housing defining an internal cavity. The housing has a hollow and buoyant annular body, an upper cover and a lower cover. The internal cavity is formed between the upper and lower covers. A substantially annular inlet is formed in the annular body for ingress of liquid into the cavity. The annular body has a buoyancy sufficient for the liquid intake to float in a liquid with the annular inlet submerged below the surface of the liquid in which the liquid intake is floating. A pipe extends into the cavity and the pipe includes an inlet that in use is open below the surface of the liquid within the cavity. The pipe extends outside of the cavity for connection to a liquid suction removal system.