DAF (Dissolved Air Flotation) operates on the principal of the transfer of floc to the surface of water through attachment of air bubbles to the floc. The floc accumulated on the surface, known as the 'float', is skimmed off as sludge. The clarified water is removed from the bottom and is sometimes called the subnatant or 'floated' water.
Since rain, snow, wind or freezing could cause problems with the float, flotation tanks must be fully enclosed in a building. The process is particularly suited to treatment of eutrophic, stored lowland or otherwise algae laden waters and soft, low alkalinity upland coloured waters. Flotation performance depends on the effectiveness of coagulation and flocculation.
| Model | QK-DAF10 | QK-DAF25 | QK-DAF50 | QK-DAF80 |
|---|---|---|---|---|
| Capacity (m3/h) | 10 | 25 | 50 | 80 |
| Dimensions (mm) | 4000*2000*2250 | 6000*2500*2250 | 8000*2800*2250 | 9000*3000*2250 |
| Water return pump (kw) | 4 | 5.5 | 7.5 | 11 |
| Scraping unit motor (kw) | 0.37 | 0.37 | 0.55 | 0.75 |
| Air compressor motor (kw) | 1.5 | 1.5 | 2.2 | 3 |





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