What is DAF technology?

​Dissolved air flotation (DAF) is a proven and effective physical/chemical technology for treating a variety of industrial and municipal process and wastewater streams.

What is DAF treatment?

Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. A very similar process known as induced gas flotation is also used for wastewater treatment.

How does a DAF plant work?

Dissolved air flotation, the most common approach, works by attaching small bubbles of air to suspended solids. The bubbles are generated by saturating a recycled stream of water with air under pressure, then releasing the pressure rapidly to produce clouds of microbubbles.

What is a dissolved air flotation unit?

Dissolved Air Flotation is a proven and effective physical/chemical technology for treating a variety of wastewater streams. Contaminants are removed using a dissolved air-in-water solution produced by injecting air under pressure into a recycle stream of clarified DAF effluent.

What is DAF sludge?

Dissolved air flotation or DAF sludge dewatering and filtering systems are used in a variety of industries and applications to remove suspended solids, fats, oils and greases from a variety of wastewaters.

What is DAF tank?

Dissolved air flotation (DAF) is one of the most versatile and effective process in water, wastewater treatment and desalination. In several ocassions, dissolved air flotation system is installed at the beginning of the water treatment process, immediately after the pretreatment to remove fat and grease.

What is the purpose of dissolved air flotation?

Dissolved air flotation systems are designed to remove fats, oils and grease (FOG), suspended solids (TSS), biological oxygen demand (BOD), food/animal production/processing wastes, industrial wastes, hydrocarbon oils/emulsions and many other contaminants.

Can air be dissolved in water?

The maximum amount of gas that can be dissolved in water, the solubility), depends on pressure and temperature. Air dissolved in water contains approximately 36 percent oxygen compared to 21 percent in air. The remaining amount can be considered as Nitrogen.

How does a sludge thickener work?

Sludge flows into the thickening tank, and eventually, it removes excess water from the solids collecting at the bottom. These suspended solids have a lower gravity than water when air bubbles attach to them, which makes them float. These particles form a blanket of sludge on the surface that you can remove and treat.

What is chicken DAF?

One of the best-known for a wastewater operator at a meat processing facility is “DAF,” pronounced “daf” or, sometimes, “D-A-F.” It stands for Dissolved Air Flotation, and it basically works like your soda bottle. Inside a poultry processing facility, meat is tossed, turned, tumbled, sliced, diced, washed, and cut up.

How fast does air diffuse in water?

The higher the diffusivity (of one substance with respect to another), the faster they diffuse into each other. Typically, a compound’s diffusion coefficient is ~10,000× as great in air as in water. Carbon dioxide in air has a diffusion coefficient of 16 mm2/s, and in water its diffusion coefficient is 0.0016 mm2/s.

What happens when water is mixed with air?

As the water is propelled into the air, it breaks into small droplets. Collectively, these small droplets have a large surface area through which oxygen can be transferred. Upon return, these droplets mix with the rest of the water and thus transfer their oxygen back to the ecosystem.

How does a dissolved air flotation ( DAF ) system work?

Each component is crucial to the operation of a DAF clarification system. A dissolved air flotation (DAF) clarifier separates suspended solids in wastewater. DAF clarifiers can be round or rectangular tanks. All DAF clarifiers have some internal mechanical components intended to speed up the removal of the suspended solids in the wastewater.

How does a microfloat DAF diffuser work?

The DAF has a specially designed non-clog spinning disc diffuser that creates fine microbubbles (10-50 microns in diameter), allowing for high removal efficiencies. The complete Microfloat DAF system uses only two motors; the Microfloat aerator motor and the scum/rake drive. The Microfloat DAF system does not require an external recycle line.

How does Coco Daff dissolved air flotation work?

COCO DAFF ® (counter-current dissolved air flotation filtration) is an innovative combined flotation–filtration design in which air and water flow counter-current as against co-current in the conventional dissolved air flotation process ( Fig. 7.6 and Plate 12 (b) ).

Who are the manufacturers of dissolved air flotation systems?

P-TEC DAF Systems is a Dissolved Air Flotation (DAF) Systems Manufacturer. We specialize in DAF Rentals, DAF Sales, and Custom DAF Fabrication. Do you have questions? Call us toll-free at (800) 450-0398. P-TEC is ready to help you in any way possible. Our Team’s expertise is just a phone-call or email away.