Principles of DAF unit water treatment

Nov. 30, 2017

DAF unit water treatment is comprised of flotation tank, feed pump, pressure pump, air compressor, air mixing tube, chemical feed system, overflow weir and a spiral scoop for collection and removal of floated sludge.

The inlet, outlet and sludge removal mechanisms are contained in the central rotating section. This section and the spiral scoop rotate around the tank rim at a speed synchronized with the flow.

Dissolved air flotation for water clarification is operated in the recycle flow pressurization mode where a portion of clarified effluent is continuously recycled from the collection tank to the air mixing tube into which compressed air is also introduced. This process saturates pressurized effluent water with air under pressure.

Dissolved air flotation for water clarification

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