Dissolved air flotation plant 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.