Air flotation covers a set of technologies designed to remove suspended matter, including fine solids, fats, oils and greases, from municipal wastewater, industrial effluent, water and oil-water mixtures. Read More

Liquids will often be pre-treated with chemicals, typically coagulants or flocculating polymers, to aid the process.

In dissolved air flotation (DAF) air is dissolved under pressure into the liquid to be treated and then released at atmospheric pressure into a tank.

This process releases tiny bubbles (20-80 microns in size) that attach to the suspended material, causing it to float to the surface. Skimmers remove the floating material for disposal, further treatment or material recovery.

In cavitation air flotation (CAF) the bubbles are produced by a rotating disk rather than under pressure.

With induced air flotation (IAF) the bubbles are formed by the mechanical agitation of injected air. 

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Air flotation - helping you find the best solution for your project.

  • Puriflo - a division of ESE Engineering: Effluent treatment system for fats, Unilever Bestfoods
    Effluent treatment system for fats, Unilever Bestfoods
    Puriflo - a division of ESE Engineering
    Unilever Bestfoods required a system to handle fats in effluent at its factory at Crumlin in South Wales. Puriflo designed a complete effluent treatment system in consultation with the Unilever Bestfoods site management. The...
  • Puriflo - a division of ESE Engineering: DAF system for UNIQ Prepared Food
    DAF system for UNIQ Prepared Food
    Puriflo - a division of ESE Engineering
    The UNIQ Prepared Foods factory at Northampton required an effluent treatment system, but space at the factory was limited. The Puriflo team designed custom plant to fit into the space available. The DAF unit and chemical...
  • Puriflo - a division of ESE Engineering: Puriflo DAF systems
    Puriflo DAF systems
    Puriflo - a division of ESE Engineering
    Puriflo dissolved air flotation (DAF) systems come in a number of standard sizes, for example, for flotation areas of 4 x 1m, 4 x 2m and 6 x 2m. Puriflo DAF systems are packaged units that are piped, wired and tested prior...
  • Puriflo - a division of ESE Engineering: DAF system for poultry processing unit at organic farm
    DAF system for poultry processing unit at organic farm
    Puriflo - a division of ESE Engineering
    An organic farm in Berkshire installed a Puriflo effluent treatment system. The farm has 2,250 acres of chalk downs and organically rears 140 beef sucklers, 1,700 sheep, free range pigs and poultry. There is also a large...
  • Puriflo - a division of ESE Engineering: DAF in a BOX plug-and-play dissolved air flotation range
    DAF in a BOX plug-and-play dissolved air flotation range
    Puriflo - a division of ESE Engineering
    DAF in a BOX takes Puriflo's DAF technology and packages it in a compact fashion that brings a new level of access and convenience to the provision of waste water purification. The DAF in a BOX can be installed on site in...
  • Aquatreat Environmental Products: Electrocoagulation treatment
    Electrocoagulation treatment
    Aquatreat Environmental Products
    Electrocagulation or electroflotation is an effective method of treating many types of difficult wastewaters, without the use of chemicals. The system is simple, fully automatic and needs only minimal operator input. It is...
  • Veolia Water Technologies UK: Spidflow® rapid compact flotation unit
    Spidflow® rapid compact flotation unit
    Veolia Water Technologies UK
    Spidflow is a rapid, compact flotation unit that effectively removes colour, organic matter and algae from water sources to produce high-quality drinking or process water. The Spidflow process comprises a coagulation stage,...
  • Siltbuster: Packaged lamella DAF units
    Packaged lamella DAF units
    Siltbuster
    Siltbuster designed and manufactured lamella DAF units are used to remove suspended solids, organic matter, algae, colour and fats, oils and greases (FOGs) from water and wastewater. Using established solids/liquid...
  • KWI: Largest Megacell H supplied to tissue manufacturer
    Largest Megacell H supplied to tissue manufacturer
    KWI
    KWI engineers successfully designed and installed the biggest horizontal Megacell built to date to meet a requirement from an international customer to treat tissue machine white-water. The Megacell H80 is designed to treat...
  • Jacopa: EWT™ dissolved air flotation
    EWT™ dissolved air flotation
    Jacopa
    EWT™ dissolved air flotation (DAF) systems separate and remove suspended solids from liquids by attaching micro air bubbles to the suspended particles. Systems are available in circular designs measuring up to 50 feet in...
  • WPL: WPL Dissolved Air Flotation (DAF) System
    WPL Dissolved Air Flotation (DAF) System
    WPL
    For industrial wastewater treatment a WPL Dissolved Air Flotation (DAF) system can help achieve compliance for sewer discharge and reduce costs associated with trade effluent charges. Visit WPL's website to download and read...
  • Stetfield Separators: Stetfloat dissolved air flotation (DAF) unit
    Stetfloat dissolved air flotation (DAF) unit
    Stetfield Separators
    The Stetfloat DAF unit is used for oil / solids separation. Typical applications include treatment of refinery wastes where qualities of effluent containing less than 5 mg/l of oil are required; wastes from power stations,...
  • KWI: Megacell H compact solutions for a plant in a cave
    Megacell H compact solutions for a plant in a cave
    KWI
    The new municipal treatment plant in Tremosine, Italy, officially started in July 2012. Designed to serve small municipalities located on the shores of Lake Garda the plant had to both blend in with the beautiful landscape...
  • KWI: Megacell H60 DAF units, municipal wastewater plant, Nice
    Megacell H60 DAF units, municipal wastewater plant, Nice
    KWI
    KWI have recently installed and commissioned two new Megacell H 60 DAF units, with complete covering structure, in Nice, France. The units are designed for biological sludge thickening as part of a municipal wastewater...
  • KWI: Sedicell™ dissolved air flotation clarifiers
    Sedicell™ dissolved air flotation clarifiers
    KWI
    Sedicell™ dissolved air flotation clarifiers are designed for sludge thickening. They have a simple, robust construction that allows constant performance in any condition. They are commonly used for excess biological sludge...
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Air flotation- helping you find the best companies for your project.