Dissolved air flotation plant DAF

The Dissolved Air Flotation (DAF) is an equipment that can be used in the treatment of domestic and industrial effluents. Its possible to install it for primary level treatment, solid-liquid separation replacing sedimentation and at the tertiary level for polishing and nutrient removal of the effluent. The operating principle of DAF consists in the removal of particles through the adhesion of air bubbles, promoting the rise of the flake to the surface of the equipment. On the surface there is a sludge scraper system, which is responsible for removing the sludge from the unit In order to optimize the treatment process, chemical products known as coagulants and polymers are used, which helps in the process of formation and agglomeration of the flakes, which facilitates their subsequent removal and consequent effluent clarification. The DAF can be applied mainly in the removal of suspending flakes, oils, grease and algae. The sludge from the flotation process has the characteristics of reducing the volume to be dehydrated or sent to final disposal. Some floating systems can be used as auxiliaries in the removal of iron, manganese and phosphorus. APPLICATION SEGMENTS: • Water treatment for human consumption (in place of decanters, in some cases replacing sediment settlers); • Treatment of primary or secondary industrial effluents; • Tertiary treatment and final polishing, especially in the removal of phosphorus; • Treatment of domestic sewage, and water reuse systems. APPLICATIONS: • Removal of suspended solids, algae and humic substances; • Pre-clarification of water to eliminate part of the pollutant load; • Recovery of oils, fats, starches (raw material);