Dissolved Air Flotation (DAF) systems are used to remove small suspended solids from fresh water, process water, and wastewater streams. Compressed air is injected into a pressurized recirculated stream to create tiny air bubbles that adhere to the suspended solids and float them to the surface. The "float" is then skimmed off and collected for reuse or disposal. The addition of coagulant and flocculant chemicals can enhance the flotation process and improve the efficiency of the DAF system.
Learning Objectives
- Describe common applications of the Dissolved Air Flotation (DAF) process
- Describe the main steps of the DAF process
- Describe the equipment utilized in a DAF system
- Identify chemicals commonly used as coagulants and flocculants in DAF systems
- Describe coagulant and flocculant chemicals used in DAF systems
- Identify hazards associated with DAF system