DISSOLVED AIR FLOATATION SYSTEM (DAF)
Dissolved air floatation (DAF) systems are commonly applied to remove suspended solids, fats, oils and associated BOD and COD from a variety of waters and waste-waters. Typically applications for DAF’s are found in the food and chemical processing facilities, pulp and paper processing, and any facility which requires the reduction of oils, fibers, and other light solids. PACT® DAF technology has been used with great success over the years to float contaminates from wastewater. systems are well-suited for the removal of light solids such as oil, fibers, proteins, starches, blood, inks, dyes and other substances which do not settle well by gravity.
PRINCIPALS OF PACT® DAF SYSTEM
F-DAF systems are consisted by processing tank, dissolved air system, recycling water system, dissolved air releasing system, skimmer and control panel. Air is dissolved into a recycled portion of the treated water flow and is mixed with the untreated water entering the flotation cell. As the air comes out of solution, it forms sub-micron bubbles which attach themselves to the suspended solids and oils. These solids float to the surface where a simple, single shaft skimmer removes them for further processing or disposal.
ADVANTAGES OF PACT® DAF SYSTEM
PACT® F-DAF systems are high-rate processes when compared with more traditional gravity-based settlements systems. the more effective systems mean that a reduction in space requirements can be achieved. F-DAF systems are particularly applicable to highly coloured, low alkalinity, low turbidity water, typical of many surface water supplies. F-DAF treatment operates on smaller sized floc than gravity setting, which reduces the use of chemical coagulants and flocculants. F-DAF also achieves very low effluent turbidity to long filter runs. the float form of F-DAF is more highly concentrated than the sludge from settling, thereby reducing the cost of sludge management and disposal. Additionally, F-DAF systems offer the operator some degree of flexibility, subject to design, with regards to the system’s operating parameters degree of flexibility, subject to design, with regard to the system’s operating parameters.
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