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- Sereco - Dissolved Air Flotator (DAF)
Sereco - Dissolved Air Flotator (DAF)
The DAF type consists of a complete pressurization system, loading/expansion cones in a number depending on the tank dimensions, flotation tank, deflectors, weirs and channel for the clarified water transfer, a recovery system for the floated material and a control panel for all the equipment. The small size models (DAF 24, DAF 32, DAF 45 and DAF 61) have a circular flotation tank, one only central loading/expansion cone and the truncated-cone tank bottom to convey the settled sludge to the middle and then eliminate it by piping.
The floated material recovery system consists of a fixed grating, a set of surface scrapers which, thanks to a sturdy gear motor, move with circular motion, and a floated material recovery/elimination. The bigger models are instead consisting of the rectangular flotation tank, several loading/expansion cones and the bottom where there are several hoppers for the sludge discharge. In this case the floated material recovery system consists of a surface chain scraper.
This system allows flotation tanks of any capacity. The tank can be manufactured in metal structure or concrete.
The floating particles, including oils and greases, are gathered on the tank surface, above the grating and are removed by the surface scraper motion. The treated water is sent away by means of weirs and channels.
In both models, the pressurization system is complete with flow meters to measure and control the recycle flow of air and pressurized water and with electric recycle pumps complete with valves. The recycle water expansion ensures the formation of bubbles of adequate size. Too big bubbles would cause the crack of flocks while too small bubbles would involve a low flotation efficiency. The standard construction type is in carbon steel. On request, the construction in stainless steel or aluminium is possible.
Strenghts
- WIDE RANGE OF SIZES SUITABLE FOR ANY REQUIREMENT.
- OPTIMUM SEWAGE FLOTATION, WITH LOW ENERGY CONSUMPTION.
- BUBBLE SIZE ADEQUATE FOR THE FLOTATION.
- SYSTEM COMPLETE WITH ANY ACCESSORIES FOR THE OPERATION.
- SOLID-LIQUID SEPARATION ALWAYS EFFECTIVE.