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Language: English
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Training Time: 15 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English
Dissolved air flotation (DAF) is a water treatment process that removes suspended solids from water using air. This separation is achieved by dissolving air into water under pressure, and then releasing the air at atmospheric pressure in a flotation tank. This module will describe common applications of the dissolved air flotation (DAF) process and the main steps of the DAF process.
At the end of this module, you will be able to:
The following key questions are answered in this module:
How are tiny fiber fines removed from suspension in a dissolved air flotation system?Tiny fibers attach to small air bubbles and are carried to the surface of the DAF clarifier.
What types of chemicals are added to the DAF process to assist in particle separation?Coagulants and flocculants can be added to DAF units in order to increase their separation efficiency.
What is the purpose of prescreening ahead of DAF units?Prescreening the feed stream to a DAF unit reduces the solids loading on the unit.
Where in the DAF unit is new feed added?Incoming feed is released at the bottom of the unit, giving a chance for dissolved air bubbles to form and collect suspended particles as they rise.
What happens to the separated material that floats to the top of a DAF unit?Separated material is skimmed from the surface of the DAF unit. If the unit is treating paper machine white water the float may be recycled.
Below is a transcript of the video sample provided for this module:
Centrifugal Cleaners
View Course
DAF System Chemicals and Chemistry
White Water Circulation Loops
White Water Clarification
White Water System Design
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