A drive module which is a self-supporting structure being transferable and hoistable as an integral entity. The drive module includes a self-supporting framework having a shape of a rectangular parallelepiped. The self-supporting framework defines an inner space within the self-supporting framework. The drive module also includes at least two drive units. The drive units are supported to the self-supporting framework in the inner space of the self-supporting framework. The drive units are connectable to an external rotatable shaft for the rotation of the rotatable shaft located outside the drive module.

A gas flotation tank is provided that includes a series of adjacent chambers which impart a rotational current therein. Each chamber is separated from a skim oil trough by a skimming weir. Each chamber comprises an alternating fluid communication device between adjacent chambers allowing fluid communication between adjacent chambers in the form of a communication port in the dividing wall between adjacent chambers and a chamber outlet in conjunction with a perforated plate and the outlet is positioned in fluid communication with the final chamber. An optional coalescing media may be positioned in or proximate the communication port to absorb or coalesce contaminants as they pass therethrough.

A system for concentrating particulate mixtures of hydrophobic and hydrophilic material in a fluid medium is presented. The system comprises a separation chamber comprising three or more processing compartments in series. Each processing compartment comprises a manifold for the introduction of teeter water that comprises a mixture of water and air bubbles, suspended solids that form a fluidized bed that is created by the upward movement of the teeter water through the suspended solids; and each processing compartment is independently operable. An overflow launder is located above the separation chamber and a dewatering compartment is located beneath the separation chamber.

A gas flotation tank is provided that includes a series of adjacent chambers which impart a rotational current therein. Each chamber is separated from a skim oil trough by a skimming weir. Each chamber comprises an alternating fluid communication device between adjacent chambers allowing fluid communication between adjacent chambers in the form of a communication port in the dividing wall between adjacent chambers and a chamber outlet in conjunction with a perforated plate and the outlet is positioned in fluid communication with the final chamber.

A separation tank for separating a contaminant from a contaminated fluid. A series of juxtaposed interconnected chambers having a series of baffles therein provide a revolving flow of fluid in each chamber to maximize distance for which contaminants travel to separate from the fluid. The interconnected chambers may be juxtaposed in end-to-end relation or in side-by-each configuration.

The present invention relates to a treatment system, apparatus, assembly, facility, cycle and/or method for the treatment of water or wastewater, in particular, a system, apparatus, assembly, facility, cycle and/or method for treating water or wastewater received at high flowrates (including in excess of approximately 200 L/min) through a series of two or more dissolved air flotation chambers.

The invention relates to a method and apparatus for minimizing froth drop back in a flotation cell undergoing froth flotation. The flotation cell has a slurry phase, a froth phase and a froth/slurry interface. Water is injected into the flotation cell at a position beneath the froth/slurry interface.

A froth flotation unit for treating mineral ore particles suspended in slurry includes a tank, a gas supply for introducing flotation gas into the slurry to form froth, and a first froth collection launder including a first froth overflow lip facing towards the centre of the tank. The froth flotation unit has a pulp area of at least 15 m.sup.2 measured at a mixing area. The froth flotation unit further includes a second froth collection launder with a first froth overflow lip facing the perimeter of the flotation tank, and a froth blocker arranged between the first froth overflow lip and the second froth overflow lip. A froth flotation line, its use, and a froth flotation method are also disclosed.

A method and a system for treating fluid. The method includes a fluid feeding step for feeding fluid in a fluid feeding pipe into a fluid reactor vessel, a bubbles feeding step for feeding bubbles of first fluid mixture containing first carrier fluid and first active fluid into fluid flowing in the fluid feeding pipe by means of a sparger apparatus. The method incudes a fluid mixture analyzing step for measuring the relative content of first active fluid in the first fluid mixture with a first fluid analyzer and controlling a first active fluid source with the first fluid analyzer in response to the relative content of first active fluid in the first fluid mixture as measured by the first fluid analyzer.