A passive filter cell having a basin with a floor and two or more vertical or upright sidewalls forming chute or container having first or left sidewall, second or right sidewall, and third or back sidewall, and fourth or front downwardly curved sidewall, an inlet positioned proximate a top of the fourth or front sidewall and an outlet positioned proximate the top of the third or back sidewall, wherein the floor is configured angled from the fourth or front sidewall to the third or back sidewall, discharge pipe positioned proximate junction between the floor and the third or back sidewall, and lip configured to extend from the top of the third or back sidewall into an interior of the basin.

A separator unit includes a tank defining an internal volume and having an inlet and an outlet. An insert separates the tank into an upper chamber and a lower chamber. The insert includes a weir at an upper side to define an intake area for receiving an influent liquid, a first opening in the intake area for delivering liquid down into the lower chamber and a second opening on an opposite side of the weir for delivering liquid from the lower chamber back up into the upper chamber. The separator may include one or more of the first opening being of arcuate shape, a perforated shroud extending downward from the insert within the lower chamber and/or an upflow pipe extending downward from the second opening into the lower chamber, a bottom of the upflow pipe covered, and a slot opening in a sidewall of the upflow pipe.

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 present disclosure relates to a device for removing particulates, such as sand, from a fluid at an oil and/or gas wellsite. In one aspect, a vessel for separating particulates from a fluid is provided. The vessel includes a body having an inlet and an outlet. The vessel also includes a first chamber and a second chamber disposed in the body. The vessel further includes a screen configured to separate particulates from the fluid. The screen is disposed in the second chamber. Additionally, the vessel includes a vessel door for inserting and removing the screen from the second chamber. In another aspect, a pressure vessel for separating particulates from a fluid is provided. In yet a further aspect, a method of separating particulates from a fluid is provided.

A bioreactor for a water treatment system includes an aerator tank configured to receive an influent liquid, and a clarifier positioned in the aerator tank, the clarifier having a generally conical shape and defining a downwardly-facing opening. An interior of the clarifier is in communication with the aerator tank, external to the clarifier, at least via the downwardly-facing opening, and wherein the clarifier is positioned non-concentrically with the aerator tank. The bioreactor further includes a plurality of aeration vents positioned proximal to a bottom of the tank and configured to direct air into the aerator tank, and an effluent outlet positioned in the clarifier. A relatively clean effluent liquid, in comparison to the influent liquid in the aerator tank, exits from the clarifier via the effluent outlet.

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.

A passive filter cell having a basin with a floor and two or more vertical or upright sidewalls forming chute or container having first or left sidewall, second or right sidewall, and third or back sidewall, and fourth or front downwardly curved sidewall, an inlet positioned proximate a top of the fourth or front sidewall and an outlet positioned proximate the top of the third or back sidewall, wherein the floor is configured angled from the fourth or front sidewall to the third or back sidewall, discharge pipe positioned proximate junction between the floor and the third or back sidewall, and lip configured to extend from the top of the third or back sidewall into an interior of the basin.

A device for a centrifugation container, such as a tube, is for separation of liquid fractions having a desired density range, in particular to biological and/or liquids forming suspensions. The device has a partition (7) that separates the interior of the container (1) into at least two chambers in a vertical arrangement—an upper chamber (2) and a lower chamber (3). The device having the partition (7) has an aperture (4) which can be lined up with the guide (12), on which liquids, in particular a fluid sample, can flow down from an upper chamber (3) to a lower chamber (4), of the container (1) for centrifugation. A method using the device separates out a fraction having the desired density range from the sample containing fractions of different density.

Apparatus for separating grit from a grit-loaded liquid matrix while retaining organic solids in suspension, including an inlet for admitting liquid matrix into the apparatus, an outlet for removing grit-lite liquid matrix from the apparatus main chamber, and a vortex system for removing separated liquid matrix grit from the apparatus. The grit settling main chamber defines upper and lower subchambers communicating with each other through a central aperture. A fluid flow speed gradient is established between the apparatus fluid inlet and outlet. An Eddy type fluid dynamic component is added, providing combined enhanced coarse grit and fine organics discrimination and separation. The Eddy fluid dynamic component may consist of a trio of stationary fresh water supply force fed eductors. Each eductor produces a fresh water fluid flow interacting with the liquid matrix fluid flow inside the upper subchamber, whereby Eddy-type turbulences are generating promoting fine, liquid matrix grit particle separation from the liquid matrix.

A system and a method for treating and recycling process water has a cylindrical sedimentation tank and a cylindrical tank for flotation and storage downstream of the sedimentation tank. Water is added to an inlet at the upper part of the sedimentation tank, and treated water is removed from an outlet at the lower part of the flotation tank for recycling. A screw in the sedimentation tank has a major diameter similar the sedimentation tank, which forces water to flow rotationally from the top towards the bottom of the sedimentation tank. A riser between the sedimentation tank and the flotation tank with one end in a lower part of the sedimentation tank, and the other end at an upper part of the flotation tank. A cleaning loop with ozone added is between the tanks, removing water from the flotation tank and returning it to the sedimentation tank.