Dissolved Air Flotation (DAF)
Dissolved Air Flotation (DAF) is an efficient flotation method for water clarification. The term refers to the method of producing flotation by dissolving air in the water under pressure and then releasing the pressure. When the pressure is released the solution becomes supersaturated with air as millions of small bubbles form. These bubbles attach to any particles in the water causing their density to become less than that of water. The particles then rapidly float to the surface for collection and removal, leaving the clarified water behind.
Dissolved Air Flotation Features:
1.Flow rate of one set: 1-100 (suitable for export).
2. Recycle flow dissolved air flotation.
3.High efficiency pressurization system creating large quantities of micro bubbles large
quantities of small bubbles.
4.Custom design on different DAF equipment and recycle flow ratio according to the type of wastewater and treatment requirement to achieve target removal effect and stability.
5.Adjustable stainless steel chain type skimmer to suit the different quantity of sludge
6.Integrated coagulation tank or flocculation tank and cleaning water tank (as optional) is available to save the space and cost.
7.Automatic and remote controllable.
8.Material of construction.
① Carbon Steel (Expoxy Painted).
②Carbon Steel (Expoxy Painted)+FRP Lining.
③Stainless Steel 304/316L.
Typical Applications:
DAF is a proven, and effective physical-chemical technology commonly used for many industrial and municipal applications, including:
1.Product recovery and reuse
2.Pretreatment to meet sewer discharge limits
3.Pretreatment to reduce loading on downstream biological systems
4.Polishing of biological treatment effluent
5.Removing silt and grease from industrial water
DAF is used extensively in the following industries:
1.Meat, poultry and fish processing
2.Dairy industry
3.Petrochemicals
4.Pulp and paper
5.Food and beverage
Typical Applications:
| Model | Capacity （m³/h） |
Dissolved air water volume(m) | Main motor power(kW) | Mixer power(kW) | Scraper power(kW) | Air compressor power(kW) | Dimentions (mm) |
| HLDAF-2.5 | 2～2.5 | 1 | 3 | 0.55*1 | 0.55 | – | 2000*3000*2000 |
| HLDAF-5 | 4～5 | 2 | 3 | 0.55*2 | 0.55 | – | 3500*2000*2000 |
| HLDAF-10 | 8～10 | 3.5 | 3 | 0.55*2 | 0.55 | – | 4500*2100*2000 |
| HLDAF-15 | 10～15 | 5 | 4 | 0.55*2 | 0.55 | – | 5000*2100*2000 |
| HLDAF-20 | 15～20 | 8 | 5.5 | 0.55*2 | 0.55 | – | 5500*2100*2000 |
| HLDAF-30 | 20～30 | 10 | 5.5 | 0.75*2 | 0.75 | 1.5 | 7000*2100*2000 |
| HLDAF-40 | 35～40 | 15 | 7.5 | 0.75*2 | 0.75 | 2.2 | 8000*2150*2150 |
| HLDAF-50 | 45～50 | 25 | 7.5 | 0.75*2 | 0.75 | 3 | 9000*2150*2150 |
| HLDAF-60 | 55～60 | 25 | 7.5 | 0.75*2 | 1.1 | 4 | 9000*2500*2500 |
| HLDAF-75 | 70～75 | 35 | 12.5 | 0.75*3 | 1.1 | 5.5 | 9000*3000*3000 |
| HLDAF-100 | 95～100 | 50 | 15 | 0.75*3 | 1.1 | 3 | 10000*3000*3000 |