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Dissolved Air Flotation (DAF) Systems
Dissolved Air Flotation system is an advanced wastewater treatment used mostly in the industrial sector in the country to treat wastewater algae, organics, oil and grease. It is very efficient for the reduction of Chemical Oxygen Demand (COD) present in fat, grease, oil, biological sludge, coloured organic matter, and colloidal material. It is also excellent for removing oil and grease from industrial wastewater, as mentioned. DAF has been used for treating drinking water clarification and treatment in several countries like the UK in Europe since the late 1960s and is a common method of choice in drinking water treatment systems in the US too since the 1980s. In India, though, it is typically used in a wide range of industrial applications to comply and maintain environmental compliance.
What the DAF process does is to separate suspended contaminant particles from liquids, like oil and grease, by bringing them to the surface of the liquid. These light particles are thus easily removed using physical methods. DAF also facilitates efficient wastewater and process water treatment through flotation with microbubbles. The incoming wastewater into a DAF system usually requires pre-treatment. Chemical coagulant(s) and/or flocculant(s) are usually added and the adjustment of pH may may also be necessary to ensure optimum operating conditions for DAF.
Dissolved Air Flotation Process in Wastewater Treatment
DISSOLVED AIR FLOTATION SYSTEMS FOR WATER TREATMENTS
Dissolved air flotation is a process utilized across a myriad of industries. In fact, water or Dissolved Air Flotation Unit for Wastewater creates mineral and organic sludges from filtration. Similarly, the process produces these kinds of sludges from sedimentation as well. The primary purpose, of course, is to remove magnesium, calcium, and carbonate ions from water and to replace them with other ions, including chloride, sodium, and hydroxyl. Wastewater treatments exist for recycling or re-use in several industries. Remember, it is essential for water entering and leaving industrial plants to meet all governing criteria and rules. These requirements prevent contamination of local drinking sources while ensuring any recycled water is adequately inspected for harmful chemicals and elements. Such standards not only apply to industrial wastewaters but also boiler and cooling water treatments.
WHAT IS DISSOLVED AIR FLOTATION WATER TREATMENT?
Dissolved air flotation (DAF) is a water treatment process designed to remove oils, solids, and greases. In fact, the process helps clarify wastewaters – and other waters – by eliminating different types of suspended matter. The DAF process dissolves air in the water under pressure – then releases it at atmospheric pressure. The dissolved air flotation process takes place in a tank basin, which is ideal for catching and eliminating suspended matter. In fact, the released air creates tiny bubbles, which conform to the suspended matter and cause it to rise to the surface. Skimmers or a similar device then eradicate the substance.
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