Dissolved Air Flotation (DAF) is an effective water and wastewater treatment process that removes suspended solids, oils, and other contaminants from water.

Here’s an overview of how DAF systems work and their applications:

1. Air Dissolution: In a DAF system, air is dissolved in water under pressure. This is typically achieved in a pressurized tank where the water is mixed with air.
2. Release of Air: The pressurized water is then released into a flotation tank at atmospheric pressure. The rapid decrease in pressure causes the dissolved air to form tiny bubbles.
3. Flotation Process: These microbubbles attach to suspended solids, oils, and other particles, causing them to float to the surface.
4. Skimming: The floating material, often referred to as “scum,” is collected from the surface using a skimmer.
5. Effluent Removal: The clarified water, now containing reduced levels of contaminants, is discharged from the bottom of the flotation tank.

1. Industrial Wastewater Treatment: Used in food processing, petrochemical, and paper industries to remove fats, oils, and greases.
2. Municipal Water Treatment: Effective in treating drinking water and wastewater before it is released into the environment.
3. Stormwater Management: Helps in treating stormwater runoff by removing pollutants.

• High Efficiency: DAF systems can effectively remove a wide range of contaminants, often achieving higher removal rates than conventional methods.
• Compact Design: DAF units are typically smaller than traditional sedimentation tanks, saving space in treatment facilities.
• Flexibility: They can be adjusted to handle varying flow rates and contaminant loads.

• Chemical Usage: Coagulants or flocculants may be necessary to enhance the flotation process.
• Maintenance: Regular maintenance is essential to ensure optimal performance and prevent issues like clogging.

DAF systems are an integral part of modern water treatment plants, providing a reliable solution for various water quality challenges.