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Dissolved Air Flotation

  • Chapter
Physicochemical Treatment Processes

Part of the book series: Handbook of Environmental Engineering ((HEE,volume 3))

Abstract

Adsorptive bubble separation processes make use of the selective adsorption of impurities at the gas/liquid or gas/solid interfaces of rising bubbles. The adsorbed impurities, which can be in soluble or insoluble form, are carried to the top of the bubble separation reactor, where they can be removed from the aqueous system (1,131,141,144). TO’Day, the adsorptive bubble separation processes are used for a variety of solute/liquid and solid/liquid separation applications (2–4,12–79) and many analytical and control methods have been developed for control and monitoring of the processes (5–11,14,53, 63,102—1–3,131,134). The process applications include water purification (12–18, 28–36,55,56,78–83, 89,92,101,106,107,111,112,118–124, 130,138,142–147), storm water runoff treatment (19,61,104,105,149), toxic substance removal (20,21,31–34,57, 63,107), algae separation (22,23,48,87), odor substance stripping (24,107), bacteria separation (25,26,55,56), groundwater purification (27,109–111,133,150), industrial waste treatment (49–54,57,58,60–78,81,82,93,96–101, 113–117,119,127,129,132,137,144), municipal primary and secondary clarification (40–47,85,86,91–95, 108,126,135,136, 139,140,146), tertiary clarification (88,89,115), sludge thickening (3,13,37–39,59,90, 125, 141), deinking operation, mineral compounds separation (31,57,84,154), and so forth. While there are various adsorptive bubble separation processes technically available, dissolved air flotation is the most commonly used flotation process in industry and municipalities tO’Day. In particular, dissolved air flotation is gradually replacing conventional sedimentation processes for clarification. Recently, new sequencing batch reactors (SBR) involving the use of dissolved air flotation (DAF) instead of sedimentation have been developed (133,151–153). The new SBR-DAF can be either a biological process or a physicochemical process.

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Authors and Affiliations

  1. Zorex Corporation, Newtonville, NY

    Lawrence K. Wang PhD, PE, DEE

  2. Lenox Institute of Water Technology, Lenox, MA

    Lawrence K. Wang PhD, PE, DEE

  3. Krofta Engineering Corporation, Lenox, MA

    Lawrence K. Wang PhD, PE, DEE

  4. DAF Environmental, LLC, Hinsdale, MA

    Edward M. Fahey ME

  5. Department of Environmental Science and Engineering, Zhejiang University, Hangzhou, People’s Republic of China

    Zucheng Wu PhD

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  1. Lawrence K. Wang PhD, PE, DEE
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  2. Edward M. Fahey ME
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  3. Zucheng Wu PhD
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Editors and Affiliations

  1. Zorex Corporation, Newtonville, NY

    Lawrence K. Wang PhD, PE, DEE

  2. Lenox Institute of Water Technology, Lenox, MA

    Lawrence K. Wang PhD, PE, DEE  & Nazih K. Shammas PhD  & 

  3. Krofta Engineering Corporation, Lenox, MA

    Lawrence K. Wang PhD, PE, DEE

  4. Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, OH

    Yung-Tse Hung PhD, PE, DEE

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Wang, L.K., Fahey, E.M., Wu, Z. (2005). Dissolved Air Flotation. In: Wang, L.K., Hung, YT., Shammas, N.K. (eds) Physicochemical Treatment Processes. Handbook of Environmental Engineering, vol 3. Humana Press. https://doi.org/10.1385/1-59259-820-x:431

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