Dissolved Air Flotation (DAF) Systems – Tissue
Course DetailsFAQTranscript
Get Training Now
Tissue ManufacturingDissolved Air Flotation (DAF) Systems – Tissue

Dissolved Air Flotation (DAF) Systems – Tissue

0.25 Hrs
SKU: RVCT-862

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.

Course Details | FAQ | Transcript
Get Training Now
Dissolved Air Flotation (DAF) Systems – Tissue
Get Training Now

Course Details

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 systems

Specs

Course Level
Intermediate
Languages
English
Compatibility
Audio, Video
Based on:
Industry Standards and Best Practices

Author | Vector Solutions

With over two decades of experience designing advanced 3D animated courseware and developing our proprietary learning management software, we pride ourselves by having developed over 1,000 safety and operations training modules, which have helped train over 250,000 workers worldwide. Our highly experienced team provides the industry with a simple and high-quality means of training their workforce. Whether your team consists of 25 people or an enterprise with thousands, we’re here to help.

Get Training Now

Frequently Asked Questions

Where are dissolved air flotation (DAF) systems used?

Common applications include clarification of municipal water and wastewater, and process water for tissue and papermaking operations.

What is done with the solids that are collected by a tissue machine DAF system?

They can be collected for re-use in the process, or sewered.

Is there a particular order in which coagulants and flocculants should be added?

Yes, coagulants should be added first, and then flocculants. The chemicals, addition rates, locations, and order should be carefully considered and jar tests can help determine the most effective process.

Where is the dissolved air added to the feed water to a flotation tank?

Compressed air is typically injected into a recirculated and pressurized water stream, that is mixed with the feed water to the flotation tank.

What is the difference between large rectangular flotation tanks and tall circular ones?

Rectangular units provide more retention time, while circular units use less space and can handle larger flows.

Sample Video Transcript

Dissolved air floatation or 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 floatation tank. The released air forms tiny bubbles which adhere to the suspended solids in the water causing the solids to float to the surface, where they can be removed by a skimming mechanism. Chemicals can be added to the feed water to improve solids removal. The DAF process can be used to clarify fresh water, process water, and wastewater so that it is suitable for use or discharge, In some cases, the solids are collected for reuse. Common applications include clarification of municipal water and wastewater and process water in tissue and papermaking operations.

Trusted by 24,000+ Industry Leaders