A water treatment system for a poultry chiller including a chiller tank is described herein. The system includes a float holding tank at a downstream section of the chiller tank; a fan at the downstream section of the chiller tank that is configured to blow float formed on a surface of the water in the chiller tank into the float holding tank; and a float removal mechanism at the float holding tank that is configured to remove the float from the float holding tank. Related methods are also described.

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.

THIS invention relates to froth flotation, and more specifically to a froth flotation cell and an internal sand removal arrangement for the froth flotation cell. The froth flotation cell included a tank having an operatively lower zone, an intermediate zone and an operatively upper zone, and a central dispersing chamber disposed in the intermediate zone of the tank. A slurry inlet is located in the operatively lower zone of the tank, and a slurry outlet conduit extends from the operatively upper zone of the tank towards a slurry outlet. The froth flotation cell is characterised in that the operatively lower zone is also selectively in flow communication with the slurry outlet of the tank, in order for slurry located in the operatively lower zone of the tank selectively to be displaceable into the slurry outlet.

Apparatus features a signal processor or signal processing module configured to: receive signaling containing information about a central air-core of an overflow pipe of a hydrocyclone where fluid flow is concentrated in an outer annular region of the overflow pipe that is against an inner wall of the overflow pipe during a normal operation of the hydrocyclone; and determine corresponding signaling containing information about a collapse of the central air-core of the overflow pipe of the hydrocyclone during an abnormal operation of the hydrocyclone, based upon the signaling received. The signaling contains information about a fluid flow rate of the fluid flow by detecting a change in the magnitude of a force and/or a moment on the probe.

Introduced here are systems for treating a wastewater stream to produce an effluent stream. A treatment system can include a sensor for measuring a characteristic of the wastewater stream and/or the effluent stream, a pump for supplying a chemical additive to the wastewater stream, and a controller for varying the flow rate of the chemical additive based on real-time analysis of measurements generated by the sensor. The characteristic could be, for example, turbidity, pH, total suspended solids (TSS), etc. Some embodiments of the treatment system further include a flow meter for measuring flow of the wastewater stream. In such embodiments, the controller may vary the flow rate of the chemical additive based on the measurements generated by the sensor and the flow meter.

A composite ozone flotation integrated device may include a cylinder body, an intermediate cylinder, and a central cylinder which are coaxial. The cylinder body and the center cylinder have a common bottom. The cylinder body and the intermediate cylinder have a common top. The intermediate cylinder is arranged on support channel steel between the cylinder body and the center cylinder. A top of the center cylinder is in the intermediate cylinder. The top of the center cylinder is open-mouthed. An upper part of the cylinder body is provided with a drainpipe. The top of the cylinder body is provided with an inner cylinder exhaust pipe and a slag discharge pipe. An upper part of the intermediate cylinder is provided with an outer cylinder exhaust pipe. A lower part of the center cylinder is connected to a water inlet pipe, a dissolved gas inlet pipe, and a venting and sludge-discharge pipe.

Coal fines are processed by flotation separation to separate coal particles from ash-forming mineral content particles. Coal fines are mixed water under high shear mixing conditions to form an aqueous slurry of coal fines containing between 15 wt. % and 55 wt. % coal fines. The aqueous slurry is introduced into a coal flotation cell to separate coal particles from ash-forming mineral content particles by flotation separation, wherein the coal fines have a particle size less than 100 m, and more preferably less than 50 m. Bubbles are generated in the coal flotation cell having a bubble size and bubble quantity selected to float the coal particles and to form a coal-froth containing at least 15 wt. % solid particles. The solid particles include coal particles and ash-forming mineral content particles. The coal-froth is collected for further processing.

A method of depressing copper sulfides and iron sulfides in a molybdenite flotation recovery process that uses alkaline or alkaline earth polysulfides. The method of enriching molybdenite content from a slurry having molybdenite and at least one of iron sulfides and copper sulfides can include the steps of adding an effective amount of a depressing reagent selected from one or more alkaline polysulfides, alkaline earth polysulfides, or a mixture thereof, to the slurry, wherein the pH of the slurry is greater than about 8.0; and passing a gas through the slurry to separate material by selective flotation, and recovering the molybdenite from a froth.

A method and apparatus are provided to control of a flotation separation process, including parameters of the flotation process and reagent addition to optimize mineral recovery. The apparatus includes a signal processor or processing module configured at least to receive signalling containing information about at least one acoustic characteristic of a froth layer in a flotation cell or tank of a flotation separation process; and determine a control characteristic related to the flotation separation process based at least partly on the signalling received. The signal processor or processing module may also be configured at least to: provide corresponding signalling containing information to control the flotation separation process based at least partly on the control characteristic determined.

A valve for use in controlling fluid flow in a flotation processing circuit is described, the valve including: a valve body; an inlet to the valve body; an outlet from the valve body; a member which is arranged in use to control fluid flow from the inlet to the outlet; and wherein the valve also comprises a bypass opening which facilitates fluid flow in one or both of two modes: in the first mode from the inlet to the bypass opening; and in the second mode from the bypass opening to the outlet.