Abstract: A fluid waste filtration system includes a housing configured to be coupled between and in fluid communication with a sink and a primary grease trap. The housing defines a chamber and includes a fluid inlet, a fluid outlet, and a grease outlet each in fluid communication with the chamber. The grease outlet is defined in a plane at or above a plane of the fluid outlet. A wall is disposed in the housing and divides the chamber into a first chamber and a second chamber. The wall is configured to direct a fluid that flows into the first chamber through the fluid inlet toward the grease outlet.

Abstract: 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.

Abstract: An immiscible liquids separation apparatus (50) comprising: a vessel comprising a first separation chamber (66) and second separation chamber (72) being in first fluid communication with the first separation chamber (66), the first separation chamber (66) being situated above the second separation chamber (72); an inlet (52) arranged at the first separation chamber (66) to allow a liquid to flow into the vessel; a low-density liquid outlet (78) arranged on the second separation chamber (72) to allow low-density liquid separated from the liquid to be removed therefrom; and a high-density liquid outlet (60) arranged at the vessel to allow high-density liquid separated from the liquid to flow out of the vessel, and a corresponding method.

Abstract: 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 clearance space within assembly to facilitate cleaning and increase storage capacity of trash, debris, and sediment.

Abstract: A wastewater treatment device including a vessel having an inlet for receiving an influent stream, a grit outlet and a floating-matter outlet; a separator disposed within the vessel, wherein the separator comprises a tray assembly connected to the inlet and the grit outlet, the tray assembly including a plurality of nested tray units which define a separator axis and are spaced apart from one another along the separator axis, each tray unit having a substantially conical tray aligned along the separator axis and an aperture in the tray disposed at the separator axis and in communication with the grit outlet, wherein the wastewater treatment device further includes a spray nozzle configured to deliver a jet of fluid towards a surface of water within the vessel, wherein the spray nozzle is angled towards the direction of the floating-matter outlet to force floating matter accumulated on the surface of the water towards and out of the outlet.

Abstract: The present disclosure provides a sedimentation tank capable of automatically adjusting liquid level and flow, which comprises one or more sedimentation cells which are connected in sequence, a water inlet pipe is arranged on the left side of the leftmost sedimentation cell; the front end of the water inlet pipe is bent and the input port of it is close to the wall; the highest point of the connecting pipe is lower than the highest point of the grease discharge port of the corresponding sedimentation cell, when the liquid level in the sedimentation cell reaches the discharge level of the connecting pipe, the connecting pipe automatically adjusts the flow according to different discharge level so as to adjust the liquid level of the sedimentation cell, and the settled sewage is discharged out of the tank or discharged into the next-stage sedimentation cell until the last stage, and finally discharged.

Abstract: A large capacity immiscible liquid separator adapted for placement in the ground, rather than under the sinks of food processing facilities. The liquid separator has a large oil compartment that can be vacuum suctioned to empty the contents thereof. Large volumes of the immiscible liquid influent can be processed without the use of a ball-type valve. A large circumference weir allows a large volume of separated waste water to overflow to the sewer system. The weir can be H-shaped to provide a large circumference and thus accommodate large separated waste water flows thereover.

Abstract: An immiscible liquid separator for maintaining a desired liquid relationship between an oil spillover and a water spillover irrespective of a tilt angle of the separator. The use of the separator is thus well adapted for use on ships and the like. The separator includes a cylindrical weir having an open top over which separated water spills when waste liquid is drained into the separator. The separator also includes a cylindrical oil stack having an open top over which separated oil spills when waste liquid is drained into the separator. The cylindrical oil stack is located within the cylindrical water weir, thus allowing the separator to function as desired independent of the angle of tilt of the separator.

Abstract: A skimming apparatus with a pivot arm and a drive follower on the pivot arm that guides a belting to facilitate precise placement of the belting for efficient skimming.

Abstract: A system to separate solids from liquids is disclosed. In a particular embodiment, the system includes a series of alternating baffles disposed along a length of a tank, where the series of alternating baffles define a vertical tortuous flow path of the fluid from a first end of the tank to a second end of the tank to cause solids to settle out of the fluid. The alternating baffles each have a sloped planar surface disposed between a lower horizontal planar surface and an upper horizontal planar surface to cause at least one eddy in a vertical plane as the fluid flows through the tank. The system may also include a series of tanks in fluid communication with the at least one tank and secured side by side, where the solids progressively settle out from the fluid in stages as the fluid passes from one tank to another in series.

Abstract: Devices, apparatus, systems, and methods for retrofitting or providing new water treatment vaults and chambers, with a floatable skimmer on tracks above a solid shelf that constricts and restricts water during low and medium flows for maximum detention time to allow for greater storm water treatment, and for high flows allows for the skimmer to automatically adjust to allow for greater conveyance of storm water flow. The skimmer can have float(s) across an upper edge with side edges having both centering and load bearing wheels that slide up and down within tracks that are mounted to side walls of storm water treatment chambers and vaults. Additional embodiments include multi-chamber vaults and chambers with baffles separating sediment chambers. Additionally screen treatment systems can be used with the chambers and vaults.

Abstract: The present invention relates to a separator including one or more separation members upon which residue can accumulate. An agitator is provided for agitating the separation members to remove the residue. The agitator may clean residue from the members without removing the separation members from the separator. Advantageously, the frequency that the members need to be removed from the separator and thoroughly cleaned is reduced when compared with the known separator.

Abstract: The invention relates to a decanter (2) for separating a supernatant arranged above a sludge in a settlement tank (1), wherein a withdrawal device (5, 16) with a receiving pipe (9, 18), which extends in the manner of a T-piece approximately perpendicular to a discharge pipe (4, 17), is attached to one end of the discharge pipe (4, 17). To reduce the production cost, it is proposed in accordance with the invention for the receiving pipe (9, 18) to be a polygonal pipe produced from sheet metal.

Abstract: A phase splitter (14) for splitting phases of liquids, the phase splitter (14) characterized by an elongate body (16) having a generally convexly curved liquid-facing face (28) when viewed in transverse cross-section along a longitudinal axis of the elongate body (16).

Abstract: A phase separation tank for separating an aqueous liquid from an organic liquid, the tank comprising: (A) A separation compartment having a sloped bottom wall and an aqueous liquid outlet; (B) An organic liquid compartment separated from the separation compartment by an organic separator of a height that allows for the overflow of organic liquid from the separation compartment to the organic compartment; (C) An aqueous liquid compartment separated from the organic liquid compartment by an aqueous separator and separated from the separation compartment by the organic compartment, the aqueous liquid compartment equipped with an aqueous liquid inlet; and (D) Means for transferring aqueous liquid from the aqueous liquid outlet of the separation compartment to the aqueous liquid inlet of the aqueous compartment.

Abstract: An oil collecting apparatus is provided to recover polluted nature environment and to keep nature environment clean in such a way that oil leaked over river or ocean is effectively collected on the spot, and only the oil is removed by separating water and oil, wherein the volume of the water tank configured to separate water and oil can be reduced in half, so the present invention may be applied to a small size ship, and only the oil leaked over river and ocean may be separated and collected on the spot. A water surface cleaner with an excellent oil connecting capacity may be built using the present invention.

Abstract: A grease removal system for a combination oven, requiring venting and condensation of steam, conducts excess grease through the same drainpipe as the steam to a water-filled condenser, then segregates the grease within a reservoir wall. In this way, a single opening may serve to remove both excess steam pressure and grease and temperature-moderated grease may be readily pumped to a convenient location.

Abstract: A multi-phase separation flow management apparatus has a housing with an inlet, a first outlet and a second outlet and in which a movable element is mounted. The movable element has a first passageway with an inlet and an outlet and a second passageway having an inlet and an outlet, and are disposed in the element so that the inlets of the first and second passageways are adjacent one another and the outlets of the first and second passageways are spaced apart from one another. The inlets are disposed adjacent a housing inlet, the first passageway outlet is disposed adjacent a first housing outlet and the second passageway outlet is disposed adjacent a second housing outlet.

Abstract: A separation process and system for extracting hydrocarbons from a mixture. In some embodiments, a process for separating a bitumen froth stream containing bitumen froth, water and fine solids into a bitumen enriched froth stream and a water and fine solids stream, comprises: (a) receiving the bitumen froth stream in a concentrator vessel, (b) distributing the bitumen froth stream in the concentrator vessel as a substantially uniform and generally horizontal flow of the bitumen froth stream at a first flow velocity, (c) slowing the bitumen froth stream to a second flow velocity, slower than the first flow velocity, in a separation region of the concentrator vessel to promote separation of the bitumen froth from the water and fine solids, and then (d) collecting a bitumen enriched froth stream and (e) collecting a separate water and fine solids stream. Related embodiments of systems and apparatus may also be provided.

Abstract: A pumpbox apparatus includes a reservoir volume having a first inlet for receiving a feedstock stream and a second inlet for receiving a water stream, the reservoir volume being in communication with a discharge outlet disposed to discharge accumulated liquid from the reservoir volume. The reservoir volume is operable to accumulate the feedstock stream and the water stream in the reservoir volume while withdrawing a discharge stream through the discharge outlet to cause a flow of liquid through the pumpbox. The first inlet defines a first flow velocity region between the first inlet and the second inlet and a second flow velocity region between the second inlet and the discharge outlet. The first flow velocity is lower than the second flow velocity to facilitate flotation of a low specific gravity portion of the feedstock through the first region toward an upper surface of the liquid accumulated in the reservoir volume.

Abstract: A desanding system has an elongated vessel that is tilted at a non-zero inclination angle. A fluid inlet at the vessel's upper end discharges a gas stream having entrained liquids and particulates and a fluid outlet into a freeboard portion formed adjacent an upper portion of the vessel above a gas/liquid interface formed below the fluid outlet. A belly storage portion is formed below the interface. The freeboard portion of the vessel has a freeboard cross-sectional area that diminishes along the interface from the fluid inlet to a fluid outlet spaced away from and lower than the fluid inlet. The cross-sectional are of the freeboard portion causes precipitation of the entrained liquids and particulates therefrom and collect in the belly portion of the vessel. A desanded gas stream, being free of a substantial portion of the particulates is removed from the vessel through the fluid outlet.

Abstract: A vessel for use in settling particulate matter from a fluid stream is provided. Fluid is introduced to the vessel through an angled inlet, with flow into the vessel both disrupted and deflected by an inlet baffle, to redirect the fluid stream parallel to a horizontal axis of the vessel. The velocity of the fluid stream is reduced within the vessel, allowing the particulate matter to settle along the bottom of the vessel.

Abstract: A water purifier includes an outer tube having a partition wall dividing the outer tube into lower and upper storage chambers, an intermediate tube defining a guide receiving space and a plurality of angularly spaced-apart inclined through holes to fluidly communicate the guide receiving space and the upper storage chamber, and an inner tube defining a water-exit passage and a plurality of angularly spaced-apart inclined guide holes to fluidly communicate the guide receiving space and the water-exit passage. A guide unit includes a plurality of flow guide plates disposed at positions corresponding to the inclined through holes.

Abstract: In some embodiments, a wastewater treatment system may reduce contaminants in water. A system may include one or more bioreactors which include a substrate that supports a biofilm. The bacteria used to form the biofilm may be selected to maximize the reduction of contaminants in water. Various components of the wastewater treatment system may be optimized to improve the efficiency and energy consumption of the wastewater system.

Abstract: A separator 252 for immiscible liquids comprises a tank having an inlet, a separation chamber and an outlet chamber 262, with the inlet 12 feeding effluent into the separation chamber 28 at or below a maximum acceptable flow rate. The effluent is separated into a more dense and less dense fractions in the separation chamber 28. The separation chamber 28 is in communication with the outlet chamber 262, where the more dense fraction exits. An outlet 260 for the less dense fraction is in communication with the separation chamber 28 and has a lowermost exit level at which the less dense fluid exits. The more dense fluid cannot rise to the level of the lowermost level, and the height of the less dense fluid is such that it will exit through the outlet as the more dense fluid passes over the weir.

Abstract: Methods and apparatus are disclosed for capturing and removing oil from a body of water with equipment using rod and film technology, which includes a streamlined oil tank that moves in the water and collects surface oil from an attached skimmer, arrays of inverted funnels lowered into the water to concentrate oil for removal, and containment tents to capture leaking fuel or cargo oil from a sunken ship or any underwater oil leak and channel it into a partially submerged rod and film storage tank at the surface.

Abstract: A separator for separating oils from waste water and solids. Waste liquids are drained into a baffle tube of the separator so that the oils rise and the waste water and solids migrate to the bottom of the separator. A collection head having a restriction is located at the bottom of the separator and is adapted for suctioning the waste water and the solids therein and carrying the same to a discharge outlet of the separator. Waste liquids drained into the separator provide the hydraulic force to accelerate the waste water and solids into the collection head. Liquids drained into the separator also provide the hydraulic force that allows the oils to be drained from the top of the separator.

Abstract: First and second liquids are separated from mixtures thereof in a holding tank that holds quantities of the two liquids after they have been separated and a quantity of the mixture that has not been separated. A first transfer conduit receives a pressurized mixture of the first and second liquids which is discharged into the holding tank. A venturi passageway is located in the first transfer conduit. A liquid conductor has an entry opening positioned so that at least a portion of the entry opening is located within the quantity of the mixture that is held in the holding tank and an exit opening that is in fluid communication with the venturi passageway. The increase in the velocity of the pressurized mixture flowing through the venturi passageway and the accompanying reduced pressure causes the mixture held in the holding tank to flow through the liquid conductor into the venturi passageway.

Abstract: Volatile organic compounds (VOCs), such as BTEX methanol and other non-phase separable hydrocarbons may be removed from wastewater obtained from oil or gas exploration or production operations by way of a bioreactor. The bioreactor may employ anaerobic microorganisms that metabolize various VOCs. In some embodiments, such a bioreactor may be configured to treat process flow rates of thousands of barrels of wastewater per hour. Such a bioreactor may comprise a large vessel at a larger water treatment site.

Abstract: Electrocoagulation effluent treatment apparatus and methods are disclosed, the apparatus including a primary electrocoagulation reactor chamber having treatment electrodes maintained therein and an effluent inlet and treated effluent outlet. An integrated flotation chamber is located above the reaction chamber, a vacuum device connectable with a vacuum source being received in the flotation chamber and including a foam intake and an output. A sludge chamber is defined below and integrated with the primary reaction chamber and has a settled sludge output.

Abstract: Volatile organic compounds (VOCs), such as BTEX methanol and other non-phase separable hydrocarbons may be removed from wastewater obtained from oil or gas exploration or production operations by way of a bioreactor. The bioreactor may employ anaerobic microorganisms that metabolize various VOCs. In some embodiments, such a bioreactor may be configured to treat process flow rates of thousands of barrels of wastewater per hour. Such a bioreactor may comprise a large vessel at a larger water treatment site.

Abstract: This invention relates generally to the field of separation of heterogeneous mixtures and, more particularly to a solid-liquid separating tank and system. A settlement tank including: a tank wall defining a tank inner space; an internal wall structure in the inner space and defining a fluid flow path from a center of the inner space to a fluid outlet at the tank wall; and a plurality of drainage pipes having an open internal end and an outer end connected to a drainage manifold, wherein the open internal end is positioned at a bottom of the inner space to remove gravity decanted sediment and hydrostatically decanted water from the inner space.

Abstract: An extraction system and process for extracting bitumen from a slurry containing bitumen, solids and water. The system comprises a cyclone separation facility for separating the slurry into a solids component stream and a bitumen froth stream with the bitumen froth stream including water and fine solids. The bitumen froth stream is then delivered to a froth concentration facility for separating the bitumen froth stream into a final bitumen enriched froth stream, and a water and fine solids stream. The final bitumen enriched froth stream is suitable for further processing. The system of the present invention is preferably mobile so that the cyclone extraction facility and the froth concentration facility can move with the mine face at an oil sands mining site, however, it is also contemplated that the system can be retrofitted to existing fixed treatment facilities to improve the operational efficiency of such fixed facilities.

Abstract: A method for controlling fouling of a settler vessel overflow system comprises maintaining at least a minimum stream flow in the overflow system by recirculating a portion of the overflow stream. A system for performing the method is also disclosed.

Abstract: A multi-phase flow separation apparatus has a tank with at least one inlet and at least one outlet, and an enclosure within the tank. The at least one inlet communicates an input flow into the enclosure. The enclosure has a sidewall defining an open bottom and at least one flow opening below the height of the inlet of the tank. The at least one outlet of the tank is outside the enclosure and above the at least one flow opening of the enclosure.

Abstract: The system and method is directed to improved separation or clarification of solids from a solids-laden liquid and removal of entrained gasses. A liquid to be treated is introduced into the inlet of a solid-liquid separator modified to include one or more sources of vibrational energy. The liquid is directed through a conduit within the separator. This conduit can be configured into a tortuous flow path to assist in the separation of solids from the liquid. Vibrational energy is applied to the flow path, preferably through the flow path conduit. As solids fall out of solution, they are collected. The clarified liquid is also collected. A vacuum can be applied to the system to assist in moving the solid-liquid mixture through the system and to provide vacuum clarification. Electrocoagulation electrodes and gas sparging can also be employed along with height adjustable weirs and an oil accumulator.

Abstract: A device for cleaning up spilled oil from the surface of a body of water, including a vessel adapted to float on the body of water and to pass over the oil, wherein the vessel has an inclined bow surface for directing the oil downwardly beneath the vessel. The device includes an oil/water separation column carried on the vessel having an inner cavity with a lower end forming a bottom opening oriented substantially parallel to the surface of the body of water in fluid communication with the water and spilled oil such that oil directed downwardly beneath the vessel by the bow surface is directed to the bottom opening. At least a substantial portion of the oil/water separation column is narrowed with increasing height beginning at least at a height approximately corresponding to the water line.

Abstract: A fluid drainage system configured for draining a basin impounding fluid and sediment, solids or the like of varying density and turbidity. The system includes a first conduit and a second conduit within or adjacent to the first conduit to form a fluid receiving chamber between the first and second conduits, each conduit having apertures therethrough, with the apertures of the first and second conduits being sized and arranged relative to one another and so configured as to preferentially discharge fluid from the top of a basin, thus providing flow conditions which inhibit the entry of sediment into the system so as to maximize the retention of sediment within the basin and reduce turbidity and Total Suspended Sediment in the discharged fluid.

Abstract: Fluid head height and foam/gas level control apparatus associated with a primary reaction chamber of an effluent processing electrocoagulation assembly is disclosed. The apparatus includes a plurality of rotatable disks each having an orifice located therethrough toward an outer circumference of the disk. The disks are mounted in a horizontal array of openings located at an upper portion of the primary reactor chamber, the orifices communicating through the openings, height of the orifices in the chamber being selectable by rotation of the disks. Rotatable restrictor plates are mounted on the disks for selective restriction of flow through the orifice.

Abstract: A large diameter subsea gravity separator for ultra deep water conditions of 2000 to more than 4000 m includes a vessel having a shell which defines a cylindrical tubular portion and closure portions at axially both ends of the tubular portion. The shell is a sandwich shell which is dimensioned to provide for a predetermined collapse resistance of at least MPa and includes an inner steel layer, an outer steel layer and a concrete layer completely filling the space between the inner steel layer and the outer steel layer.

Abstract: One possible embodiment of the invention could be a continuous flow separator for biodiesel formation and a method of operating same. The separator could comprise tank with hollow interior forming a main compartment, a weir-formed compartment, and a sump, the weir being formed at one end of the tank, the sump being formed in the tank bottom, the main compartment being located over the sump; a set of horizontally stacked plates received within the main compartment over the sump, each plate features a series of conical structures, cone apertures, and trough apertures; wherein the plates are so configured and stacked that the cone apertures align to form series of cone aperture columns while the trough apertures align to form series of trough aperture columns. The biodiesel moves up the cone aperture columns over a weir into the separate compartment while glycerine descends the trough aperture columns to the sump.

Abstract: A fluid drainage system configured for draining a basin impounding fluid and sediment, solids or the like of varying density and turbidity. The system includes a first conduit and a second conduit within or adjacent to the first conduit to form a fluid receiving chamber between the first and second conduits, each conduit having apertures therethrough, with the apertures of the first and second conduits being sized and arranged relative to one another and so configured as to preferentially discharge fluid from the top of a basin, thus providing flow conditions which inhibit the entry of sediment into the system so as to maximize the retention of sediment within the basin and reduce turbidity and Total Suspended Sediment in the discharged fluid.

Abstract: The present invention provides tangential flow filtration devices and methods for enriching a heterogenous mixture of blood constituents for leukocytes by removal of non-leukocyte blood constituents. In one particular embodiment the device can provide a composition enriched in monocytes.

Abstract: An apparatus for separating liquids during agitation includes a support and a honeycomb cellular structure supported by the support. The cellular structure has a top and a bottom. It is formed from a plurality of enclosed cells, which limit and re-direct liquid movement in all directions so that agitation of the support has a negligible co-mingling effect enabling a liquid separation interface to be established within the cellular structure. Each cell has an inlet and an outlet, which are out of register creating a non-linear migration path from the bottom to the top of the cellular structure. A capture assembly is provided to capture less dense liquids after separation has occurred.

Abstract: A separation unit for separating oil from oily water has a first oil to water ratio and the separation unit comprises a body which defines an inner chamber and which has a first end-wall and an opposite second end-wall and first and second side-walls that extend between the first end-wall and the second end-wall. The inner chamber is at least partly delimited by the first end-wall and the second end-wall, the first side-wall and the second side-wall. The separation unit further comprises a third wall which constitutes a separation wall extending from the first end-wall towards the second end-wall and divides the inner chamber into a first and a second sub-chamber. An inlet is defined at the first side-wall and the first end-wall and a first outlet is defined at the second side-wall and the first end-wall. A passage is defined at the third wall and the second end-wall and a fluid path from the inlet which passes through the first sub-chamber and the passage and the second sub-chamber to the first outlet.

Abstract: The overflow and underflow effluents of a conventional hydrocyclone are discharged into enclosed vessels, so that the operating pressure may be manipulated for each effluent independently of other operating parameters. Each of the effluent vessels is equipped with a source of pressurized gas to form a gas blanket over the effluent at a controllable pressure. Such variable pressures in each vessel, in combination with the pressure of the incoming feed stream, provide the necessary parameters to implement pressure-differential-ratio control, thereby improving the efficiency of separation.

Abstract: A thickening tank has a peripheral overflow launder and a centrally disposed feed well. Feedstock slurry is fed to a mixing box which also receives supernatant liquid and is supplemented by flocculated material flowing into the interior of the feed well onto a distributor baffle plate. The supernatant liquid is delivered at a controlled rate from a receiving vessel formed by an upright cylinder provided at its lower end with an impeller of a lift pump which is operated by a controller positioned at the upper end of a vertical drive shaft extending axially through the receiving vessel. The feed well is surrounded by a second launder which is closed at its base and formed with a cup. The lower end of the receiving vessel is spaced from the floor of the cup to draw supernatant liquid exclusively from the second launder rather than from the thickener tank.

Abstract: A wastewater treatment system includes an outer tank, an aeration chamber partition located within the outer tank and forming an aeration chamber, and a draft tube located within the outer tank and vertically extending into the bottom of the aeration chamber to communicate the aeration chamber with an outer chamber formed. A submerged aerator is located within the draft tube. An inlet communicates influent into the aeration chamber and an outlet communicates effluent out of the outer tank. A scum baffle prevents floating solids from entering the outlet. The outer tank has an effluent weir which supports the scum baffle and the scum baffle has an upward facing flange that supports the aeration chamber partition. An air intake pipe extending to the aerator through an upper end of the draft tube has support members engaging a top of the draft tube to support the aerator within the draft tube.

Abstract: A fluid evaporation system includes a housing bounding an airflow path. A misting system is positioned within the airflow path for spraying a wastewater into the airflow path. Water in the misted wastewater is evaporated, thereby concentrating minerals in the wastewater. A pretreatment system is positioned upstream from the fluid evaporator. The pretreatment system includes a gas induced separator. Separation of hydrocarbons and water are enhanced using a polymer and/or by lowering the pH of the wastewater.

Abstract: First and second liquids are separated from mixtures thereof in a holding tank that holds quantities of the two liquids after they have been separated and a quantity of the mixture that has not been separated. A first transfer conduit receives a pressurized mixture of the first and second liquids which is discharged into the holding tank. A venturi passageway is located in the first transfer conduit. A liquid conductor has an entry opening positioned so that at least a portion of the entry opening is located within the quantity of the mixture that is held in the holding tank and an exit opening that is in fluid communication with the venturi passageway. The increase in the velocity of the pressurized mixture flowing through the venturi passageway and the accompanying reduced pressure causes the mixture held in the holding tank to flow through the liquid conductor into the venturi passageway.