Dissolved Air Flotation K-S Dissolved Air Flotation Komline-Sanderson Dissolved Air Flotation Clarifier is suited for wastewater streams containing solids, oils, and greases, which are difficult to settle or have a tendency to float. With proper chemical conditioning we remove colloidal and emulsified materials. Complete pretreatment systems can be supplied. High rate design High removal efficiency Meet effluent discharge requirements Recovering suspended material Reclaiming water for reuse Thickening of slurries and sludges 123 Applications Benefits Design System FAQs The Komline-Sanderson Dissolved Air Flotation Clarifier is designed for the removal of suspended solids or water immiscible liquids from process or wastewater to produce an effluent of high clarity and free of objectionable particles or liquid. Dissolved air flotation is best applied to remove materials that normally settle slowly, persist by remaining in suspension, or have a tendency to float. Aircraft Maintenance Algae Removal Automotive Industry Bakery Waste Ballast Water Canning Chemical Processing Plants Fiber Recovery Heavy Metal Recovery Latex Meat Packing Paint Waste Pet Foods Pharmaceutical Potato Processing Poultry Processing Prepared Foods Pulp and Paper Mills Refineries Rendering Seafood Processing Slaughter House Tank and Truck Cleaning Tanning Textiles Vegetable Oil How does it work? Dissolved Air Flotation (DAF) is a process for the removal of fine suspended material from an aqueous suspension. The term “flotation” indicates something floated on or at the surface of a liquid. The DAF provides the energy for effective flotation in the form of extremely fine air bubbles, which become attached to the suspended material to be removed. This attachment of bubbles to the particle “reduces” the density of the particle resulting in increased buoyancy, thus effecting flotation. Chemical conditioning is often used to increase the effectiveness of the dissolved air flotation process. The most reliable and positive method of producing bubbles of the proper size is to dissolve air into water under pressure and to then reduce the pressure of the solution. As the pressure is reduced, the air comes out of solution in the form of microbubbles. Wastewater is pretreated with chemicals. Treated influent is fed to DAF unit. Recycle is drawn off effluent line and is sent through the air dissolving system and then sent back into the DAF. Air is released from the recycle flow and the bubbles help to float solids in the DAF tank. Float is skimmed from the top of the tank. Clear effluent flows out of the unit. How do I know if a K-S DAF is right for my process? Does your process involve: Clarification of a wastewater stream Reduction of TSS, COD, and BOD to meet effluent discharge limits Recovery of suspended material Reclaiming water for reuse Thickening of slurries and sludges Are you interested in: Minimal operator attention Low maintenance time and expense A well-built machine offering long equipment life If you can relate to these objectives, then follow these steps: Establish influent and required effluent conditions as accurately as possible Complete the K-S Applications Questionnaire Contact us to assist in making a preliminary selection Perform lab and/or pilot scale testing if necessary Make final selection Other considerations: What is immediately upstream and downstream of the DAF? What is most important: floated solids concentration, effluent clarity, capital or operating cost, etc.? What have you tried before? Why did/didn’t it work? What materials of construction are acceptable? What are not? Do you need auxiliary equipment, such as chemical pretreatment, for example? Do you need any instrumentation or controls? Do you have any standard specifications? There are many factors affecting the operation of a clarification process. Among these are chemical pretreatment; power, water, air, or other utilities; operator attention; cleaning requirements; and maintenance needs. All of these should be considered when selecting a wastewater clarification system. Questionnaires Online Questionnaire Downloadable Questionnaire Municipal Sample Questionnaire Industrial Sample Questionnaire Literature New Energy DAF Testing Services Lab and Pilot Testing Since its incorporation in 1946, Komline-Sanderson Corporation has provided the highest quality equipment for applications including process/production filtration, drying, thermal processing, wastewater treatment, sludge processing, and pollution control. © 2021 Komline-Sanderson. Headquarters 12 Holland Ave PO Box 257 Peapack, NJ USA 07977-0257 800-CALL-4KS (800-225-5457) Quick Links Resource Library News & Events Certifications Careers Contact Us Visit Us Privacy Policy Sitemap Find Us On