Dissolved Air Flotation


1.2 CEUs


This two-day course is intended to give you a comprehensive look at DAF as a wastewater treatment process with the aim that you’ll be able to take the concepts learned in this course and apply them to operating a DAF system at your own plant.

Use of dissolved air flotation (DAF) is increasing in wastewater treatment. As a solids separation process, DAF is an extremely fast and efficient way of capturing solids when compared to traditional sedimentation processes such as gravity thickening.

Operators who understand the concepts behind how a DAF works are better equipped to operate and maintain a DAF system efficiently. Operating a DAF system at its peak potential can substantially reduce costs related to the solids separation process. It can also produce cleaner effluent and thicker solids, which means less processing is required downstream.

The module is designed for classroom participation and incorporates individual and group activities throughout the course.

The CEUs from this course can be used toward the following discipline(s) for certification renewal:

• Wastewater treatment


Note: If you have previously taken this course through Edmonton Waste Management Centre of Excellence (EWMCE) please be aware of the CEU implications of retaking the same course. Contact Alberta Environment for information.

Delivery Formats

There are no available options for this course at this time - please contact .


The in-class training has been organized into four main sections:

1. Introduction to Dissolved Air Flotation (DAF)
2. The Science of DAF
3. Design and Operation of a DAF System
4. Troubleshooting

By the end of this course you will be able to:
-Identify the two main purposes of a DAF system.
-Identify the four major components of a DAF system.
-List the benefits of a DAF system.
-Describe how DAF systems are integrated into a wastewater treatment plant.
-Identify the major types of DAF systems.
-Identify seven scientific principles that affect DAF
-Explain the significance of flow and mass balance.
-Explain the physical forces that make air flotation occur more quickly than gravitational settling.
-Define what an air to solids ratio is and explain how it impacts DAF efficiency.
-Explain the key processes of air dissolution, air release and air distribution.
-Explain how coagulation and flocculation enhance DAF efficiency.
-Discuss the general philosophy behind designing or operating a DAF system.
-Identify three common problems operators face when operating a DAF system.
-Explain how air density impacts the amount of air required for a DAF system.
-Explain the importance of controlling air bubble size.
-Explain what surface tension is and how it can be overcome by the use of surfactants.
-Identify the most common troubleshooting situations in DAF operations and how to resolve them.

No manuals will be forwarded to students in advance of this course – the instructor will provide all material on-site.


$460.00 Must have current AWWOA Membership

$560.00 Non-Members

$345.00 (For in-class courses only) Must have a current AWWOA Membership and be an operator of a small public rural water/wastewater facility.