Dissolved Air Flotation Design

Daf works by dissolving air under pressure and then releasing millions of tiny air bubbles into the water at atmospheric pressure.

Dissolved air flotation design.

Conceptually the daf process is simple tiny bubbles attach to solid contaminants causing them to float and then sludge is skimmed off the surface of the water but designing a daf system for a real world application isn t quite as simple. Pan america environmental dissolved air flotation systems are an extremely versatile design allowing high loads of a very wide variety of contaminants to be removed from your wastestream. 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. Daf is considered to be the best most cost effective device for separating heavy loads of fog and solids.

For example look at the following spreadsheets. This work shows results concerning bubble generation at low working pressures in modified daf units to improve the collection of fragile coagula by bubbles. 7 6 and plate 12 b. Daf systems are commonly used for the removal of oils greases and suspended solids to meet a variety of treatment goals including.

Types of flotation in dissolved air flotation air bubbles are produced by the reduction in pressure of a water stream saturated with air. Product recovery and reuse. Description dissolved air flotation daf is a proven and effective physical chemical technology for treating a variety of industrial and municipal process and wastewater streams. Dissolved air flotation daf is a clarification process that utilizes air to remove suspended matter from the surface of treated water.

There are many factors that impact the overall design of a dissolved air flotation system but the most important by far is the combined tss fog in parts per million content of the wastewater. Dissolved air flotation systems effectively remove tss fog and other pollutants from wastewater. The three main types of dissolved air flotation are vacuum flotation micro flotation and pressure flotation. Abstract dissolved air pressure flotation daf is a well established separation process that employs micro bubbles as a carrier phase.

Dissolved air flotation daf has gained widespread usage over the last forty years for the removal of suspended solids tss oils and greases o g and biochemical oxygen demand bod from wastewater and other industrial process streams. Dissolved air flotation can include vacuum or pressurized methods.