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Neotech - Dissolved Air Floatation (DAF) System
Dissolved Air Flotation (DAF) systems are designed to remove suspended solids and Oil from water. Dissolved Air Flotation System also helps to remove oils, greases and suspended micro particles from a wastewater stream. Suspended Contaminants are removed through the use of micro air bubbles, produced by injecting air under pressure into a stream of clarified DAF effluent. This stream is then combined and mixed with incoming wastewater in an internal content chamber where the dissolved air floats out of solution in the form of micron-sized bubbles that attach to the contaminants. The bubbles and contaminants rise to the surface and form a floating bed of material that is removed by a surface skimmer and collected into an internal hopper for further handling.
Dissolved Air Flotation is widely used in treating the industrial wastewater effluents from oil refineries, petrochemical and chemical plants, natural gas processing plants, paper mills, general water treatment and similar industrial facilities. A very similar process known as induced gas flotation is also used for wastewater treatment. Froth flotation is commonly used in the processing of mineral ores.
Dissolved air flotation system operates on the principal of the transfer of floc to the surface of water through Floating air bubbles in the water. The floc accumulated on the surface, known as the float, is skimmed off as sludge with countinuous process. The clarified water is removed from the bottom and is sometimes called the treated water.
The design of the Dissolved Air Flotation plant is based on the specific gravity difference between the oil and the wastewater because that difference is much smaller than the specific gravity difference between the suspended solids and water. Based on that design criterion, most of the suspended solids will settle to the bottom of the separator as a sediment layer, the oil will rise to top of the separator, and the wastewater will be the middle layer between the oil on top and the solids on the bottom.
Like all clarification processes flotation performance depends on the effectiveness of coagulation and flocculation. Polyelectrolyte dosing is often included to compensate for reduced performance at low water temperature or if the floc is fragile. Although the process has been successfully used for some directly abstracted waters other clarification methods tend to be more suitable for treatment of such waters especially when the turbidity consistently exceeds about 100 NTU.
Dissolved air flotation is one of our best products with high end technology for industries. Neotech Water Solutions is countinuously improves the quality of products with more and advance features. like ..
- Complete, skid-mounted design available for ease of installation
- Rectangular profile for maximum space utilization
- Designed to stand with extreme environment
- Superior performance with less manual inputs
- An improved high level system which is both efficient and simple to use
- Compact design to reduce space.
- Gravity operated, so no utilities required
- Effectively dewaters the oil, making oil recovery much simpler
- Long life and corrosion resistance
- Eliminates bridging and plugging of viscous materials
- Economical and reliable operations
- Low operating and maintenance costs
- Removes high concentration of oil and suspended solids from water