A system and method for processing interface emulsion, water, and solids contained within a separator vessel that comprises the steps of continually extracting those components from the vessel and then passing them through a gas flotation cell. The cell, which is preferably a vertical induced gas flotation cell, separates the oil and water contained in the interface emulsion and discharges recovered oil from an upper portion of the cell and treated water from a bottom portion of the cell. The recovered oil and treated water may be further processed and recycled to the vessel or sent elsewhere. The treated water may also be recycled to the cell or sent to a process sewer. Fuel gas residing in an upper portion of the cell may be cooled and passed through a splitter. All the steps of occur in a closed system with no air emissions.

A separation system is disclosed for separating selected particles from a mixture of particles in a fluid. The system includes a froth flotation vessel into which in use the mixture of particles and fluid are subjected to an upward flow of an introduced gas to form a froth layer which rises above an interface formed between the froth layer and the mixture of particles and fluid, such that a quantity of the selected particles is conveyed out of the vessel by the froth layer to become a first product of the system. The vessel also has a first outlet arranged in use for receiving a flow of some of the mixture of particles and fluid from the vessel, an entry to the first outlet being located in a region proximate to, but below, the interface. The vessel also has a second outlet arranged in use for receiving a flow of some of the mixture of particles and fluid from a region of the vessel which is located below the first outlet. In use the first outlet receives a quantity of the selected particles which were not conveyed out of the vessel by the froth layer, and the second outlet receives a quantity of the selected particles in a first by-product of the system. The first by-product comprises a relatively higher percentage of solids compared to the flow of particles and fluid in the first outlet. The flow of the mixture of particles and fluid from the vessel via the first outlet passes to a classification device, which separates the flow into two or more fractions on the basis of their size or density or a combination of the two.

A copper/molybdenum separation system uses sea water in the roughing circuit and desalinated water in cleaning circuit. In both roughing circuit and cleaning circuit, hydrophobic engineered media are used to recover the mineral particles of interest. The cleaning circuit includes a molybdenum loading stage configured to contact the conditioned pulp with the engineered media in an agitated reaction chamber, and load the hydrophobic molybdenite on the engineered media.

A water treatment system includes an inlet line, a tank in fluid communication with the inlet line to receive therefrom a fluid flow comprising hydrocarbons and water. The tank includes components configured to separate the fluid flow into a hydrocarbon flow and a water flow, with the water flow including a residual amount of hydrocarbons. A first outlet line is in fluid communication with the tank to discharge therefrom the water flow. A second outlet line is in fluid communication with the tank to discharge therefrom the hydrocarbon flow. A sensor is associated with one of the inlet line, the first outlet line, and the second outlet line, and a valve is associated with the second outlet line. In addition, a controller is configured to determine a property of at least one of the fluid flow, the hydrocarbon flow, and the water flow using the sensor, and to control the valve based upon the property so as to reduce the residual amount of hydrocarbons in the water flow.

A dissolved air floatation apparatus including an ultrafine bubble-containing liquid production device and a dissolved air floatation tank. The ultrafine bubble-containing liquid production device includes a gas-liquid mixing unit and a bubble-containing liquid separation device. The bubble-containing liquid separation device swirls a liquid containing ultrafine bubbles and larger bubbles in a storage tank to concentrate the liquid that contains the ultrafine bubbles and the liquid that contains the larger bubbles to a central part of the swirling flow followed by discharge. A pressurized ultrafine bubble-containing liquid is mixed in a raw liquid containing a subject to be cleansed and is poured into the dissolved air floatation tank to cause a suspended substance and a dissolved component in the raw liquid to be adsorbed on an interface of fine bubbles and be floated in the dissolved air floatation tank to be extracted.

A separation system is disclosed for separating selected particles from a mixture of particles in a fluid. The system includes a froth flotation vessel 10 into which in use the mixture of particles and fluid are subjected to an upward flow of an introduced gas to form a froth layer 13 which rises above an interface 14 formed between the froth layer 13 and the mixture of particles and fluid 12, such that a quantity of the selected particles is conveyed out of the vessel 10 by the froth layer 13 to become a first product of the system. The vessel 10 also has a first outlet 29 arranged in use for receiving a flow of some of the mixture of particles and fluid from the vessel 10, an entry to the first outlet 29 being located in a region proximate to, but below, the interface 14. The vessel also has a second outlet 20 arranged in use for receiving a flow of some of the mixture of particles and fluid from a region of the vessel 10 which is located below the first outlet 29. In use the first outlet 29 receives a quantity of the selected particles which were not conveyed out of the vessel by the froth layer 13, and the second outlet 20 receives a quantity of the selected particles in a first by-product of the system. The first by-product comprises a relatively higher percentage of solids compared to the flow of particles and fluid in the first outlet 29. The flow of the mixture of particles and fluid from the vessel 10 via the first outlet 29 passes to a classification device 31, 76 which separates the flow into two or more fractions on the basis of their size or density or a combination of the two.

The water treatment system can have a tank having an elongated shape with two opposite ends and two transversally opposite sides; a flocculation chamber at one of the opposite ends of the tank, the flocculation chamber having at least one treated water inlet and a mixer and a separation chamber adjacent to the flocculation chamber inside the tank, the separation chamber having at least one treated water outlet. A flow straightener system can be provided having a transversally-oriented wall forming an overflow baffle and extending upwardly between the flocculation chamber and the separation chamber, the transversally-oriented wall having an upper edge and a plurality of vanes being vertically and longitudinally oriented, parallel to one another and transversally interspaced from one another along the upper edge of the wall, the vanes extending in at least one of the two transversally opposite sides of the tank.

A system for recovering fat, oil and grease and removing biochemical oxygen demand and total suspended solids from brown grease or trap grease. In some cases, the system includes an integrated inlet coarse screen, primary circular zoned dissolved air and ozone flotation unit, bio-dissolved air and flotation unit, and three-phase centrifuge.

A flotation device having a flotation tank for receiving liquid to be purified, a saturator for receiving a pressurized liquid-gas mixture and at least one feeder. A line leads from the saturator to the feeder through which the pressurized liquid-gas mixture may be introduced into the flotation tank. The feeder includes a flow channel that has different flow cross sectional areas along the extension thereof. The flow channel may be a Venturi nozzle.

A separation system is disclosed for separating selected particles from a mixture of particles in a fluid. The system includes a froth flotation vessel 10 into which in use the mixture of particles and fluid are subjected to an upward flow of an introduced gas to form a froth layer 13 which rises above an interface 14 formed between the froth layer 13 and the mixture of particles and fluid 12, such that a quantity of the selected particles is conveyed out of the vessel 10 by the froth layer 13 to become a first product of the system. The vessel 10 also has a first outlet 29 arranged in use for receiving a flow of some of the mixture of particles and fluid from the vessel 10, an entry to the first outlet 29 being located in a region proximate to, but below, the interface 14. The vessel also has a second outlet 20 arranged in use for receiving a flow of some of the mixture of particles and fluid from a region of the vessel 10 which is located below the first outlet 29. In use the first outlet 29 receives a quantity of the selected particles which were not conveyed out of the vessel by the froth layer 13, and the second outlet 20 receives a quantity of the selected particles in a first by-product of the system. The first by-product comprises a relatively higher percentage of solids compared to the flow of particles and fluid in the first outlet 29. The flow of the mixture of particles and fluid from the vessel 10 via the first outlet 29 passes to a classification device 31, 76 which separates the flow into two or more fractions on the basis of their size or density or a combination of the two.