DISSOLVED AIR FLOTATION (DAF)

This is a proven and effective physical/chemical technology for treating a variety of industrial and municipal process and wastewater streams. DAF systems are commonly used for the removal of oils & greases and suspended solids to meet a variety of treatment goals including:

    • Product recovery and reuse
    • Pretreatment to meet sewer discharge limits
    • Pretreatment to reduce loading on downstream biological treatment systems
    • Polishing of biological treatment effluent
    • Thickening of bio-solids

There is a wide range of industrial and municipal applications for DAF including:

Industrial Applications

    • Poultry processing
    • Meat processing
    • Laundries and textiles
    • Egg processing
    • Byproduct rendering
    • Pulp and paper
    • Plastics recycling
    • Dairy and milk products
    • Metal plating and finishing
    • Bakeries
    • Confection aries
    • Food processing
    • Snack food processing
    • Beverage
    • Petroleum and petrochemical refining
    • Natural gas and petroleum fracking
    • Biochemical
    • Personal care product

Municipal Applications

    • Waste activated sludge thickening
    • Biological solids clarification
    • Phosphorous removal
    • Algae removal

The DAF Process

The GWT’s DAF systems are designed to remove suspended solids (TSS), biochemical oxygen demand ( BOD5), and oils and greases (O&G) from a wastewater stream. Contaminants are removed through the use of a dissolved air-in-water solution produced by injecting air under pressure into a recycle stream of clarified DAF effluent. This recycle stream is then combined and mixed with incoming wastewater in an internal contact chamber where the dissolved air comes 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 into an internal hopper for further handling.

Key Features

    • Fourteen (14) different units to meet a variety of applications and flow ranges (10 to 2,500 gpm)
    • Available in 304 or 316 stainless steel construction
    • Complete, skid-mounted design for ease of installation (no field assembly required)
    • Rectangular profile for maximum space utilization
    • Rugged tank design that will not flex
    • Superior performance without the use of plate-pack that can foul or collapse
    • Large, internal float hopper removes the need for an external float tank

Each DAF system comes with:

    • All stainless steel tank construction
    • Quality drive and pump components for long-term reliability
    • Multi-step quality control program
    • Full construction and component warranties
    • Complete start-up and training services
    • Process design assistance
    • Expert technical support before and after installation

System Options

    • Flotation cell cover to contain and vent process gasses
    • Integrated floc tube
    • Analog pressure/flow monitoring sensors
    • Laser sludge level monitoring
    • Effluent TSS monitoring
    • Custom control systems (PLC, HMI, SCADA,)

GULF WATER TREATMENT Co. Ltd

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