Ascending Efficiency: Rising Stem Valves in Critical Process Control
Nov 21,2023Read More
Dissolved air flotation (DAF) is a wastewater clarification process for the separation of solids, grease, and oils. The system helps concentrate sludge, removes a wide range of suspended solids (fats, oil, and grease) in wastewater and reduces COD and BOD.
Dissolved air flotation (DAF) works by dissolving air under pressure and then releasing millions of tiny air bubbles into the water at atmospheric pressure. This process allows the dissolved air bubbles to adhere to a suspended matter within the water, causing it to come to the surface to be skimmed away. A strong DAF system is efficient and can clarify high volumes of wastewater.
Its technical characteristics mainly include:
1. Reduced footprint – Compared to any comparable system with similar flow rate/loading levels.
2. High efficiency – Utilizes inclined settling tubes for increased surface area and faster separation.
3. Air scouring – for automatic tube cleaning.
4. Whitewater pumps – robust pumps in combination with saturation tanks provide industry leading reliability and low maintenance whitewater (dissolved air).
5. Countercurrent scraping – for the most efficient separation of sludge from the effluent water. This also allows for more free water to decant prior to sludge removal.
6. Sludge grating/thickening – Prevents sludge migration and thickens it.
7. Fewer moving parts – no need for bottom auger and motor.
8. Full movable SKID – An optional skid is now available with winch attachment.
Typically, DAF is used to clarify wastewater from food processing plants, oil refineries, oil fracking operation, chemical plants, paper mills, and others. The system will be the most efficient water treatment technology for the environmentally protection.
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