Dissolved Air Flotation

World first DAF

Aerofloat Dissolved Air Flotation

Aerofloat’s patented world-first technology Dissolved Air Flotation (DAF) technology is compact, affordable, low maintenance, odourless and self-cleaning.

Aerofloat has installed over 50+ industrial WWTP’s and 120+ Greywater treatment plants. In previous business’s Aerofloat directors have built over 600 STP’s.

Varying flow rates

Aerofloat is a unique and affordable Dissolved Air Flotation (DAF) product range has capacities from 50-800 Litres per minute (L/min) or 3- 50 m3 per hour (m3/h).

Sealed and Vented

Sealed and vented DAF tanks create an odourless treatment plant environment.

Self-cleaning system

60 degree hopper bottom tank recirculates treated water (and potential fallen solids) through an air saturator.

Modular system

Aerofloat DAF systems can be upgraded easily with additional DAF tanks modules to increase capacity of the total system.

Patented waste removal

DAF tanks are self-cleaned by funneling floated waste through 60 degree removable hopper top, eliminating the need for mechanical scrapers.

Affordable DAF

Provides an effective, affordable treatment solution compared with conventional DAFs – particularly for those where space is limited.

Industrial Applications

  • Dairy and milk products
  • Poultry processing
  • Laundries and textiles
  • Byproduct rendering
  • Pulp and paper
  • Plastics recycling
  • Meat processing and Abattoirs + Small goods
  • Metal plating and finishing
  • Bakeries
  • Oils and sauces manufacturers
  • Wineries, Breweries and beverage industry
  • Snack food processing and potato chips
  • Petroleum and petrochemical refining
  • Natural gas and petroleum fracking
  • Personal care products and Biochemical
  • Confectionaries
  • Food processing, fruit and vegetable industries

Municipal Application

  • Waste activated sludge thickening
  • Biological solids clarification
  • Phosphorous removal
  • Algae removal

Aerofloat 100, 200 DAF

Aerofloat Patented Dissolved Air Flotation is World First DAF technology, Aerofloat has installed over 150 systems since 2009.

Aerofloat 400, 800 DAF

Aerofloat Patented MODULAR Dissolved Air Flotation for larger flow rates up to 50m3/hr utilising 2x to 4x Aerofloat 200 tanks.

Circular Dissolved Air Flotation

In 2018 Aerofloat was contracted to design and manufacture a Circular Dissolved Air Flotation system with a more conventional DAF scraper.

The result was a new product offering, showcasing a 60 degree hopper for self-leaning, a hinged scraper, adopting Aerofloat DAF patented features such as effluent actuator for hydraulic float removal and the Aerofloat Air Dissolving system.

High treatment capacity

Aerofloat offers unique Circular Dissolved Air Flotation systems with treatment capacities from 10m3-250m3/hr

Dual sludge removal

Utilising features of the Aerofloat DAF with hydraulic sludge removal and traditional sludge scraper removal.

Gravity Sludge

Like the AeroDAF, Aerofloat’s circular DAF’s are built tall with a high water level, removing the need to pump sludge to the waste tank.


Hopper bottom tanks with self-cleansing designs for infrequent manual cleaning.


  • “Aerofloat were fantastic to work with. They were able to design and build a system that perfectly fits the space, removes any odour issues and meets the guidelines set out by Sydney Water.”
  • Allen Box - Norco Foods

    ENV Solutions conducted an independent comparative analysis of different solutions, and the Aerofloat DAF system was the one it recommended. Box says Norco employees travelled to New Zealand to see a similar project installation for Westland’s Milk, and agreed to move forward with the Aerofloat solution.

    Now our people are getting involved to find out all the ins and outs of how it works,” Box says. Also, because the Aerofloat tanks are fully enclosed, Box says this should eliminate the odours associated with older units that operate by more traditional DAF units on other sites, which use scrapers to remove scum, demanding more maintenance and staff supervision.

    With no moving parts, he anticipates that Aerofloat’s solution will prove far easier to operate than these. “With these new units, we’re hoping we can do a daily check to make sure it’s working alright, and then let it run itself,” he says. “If this works out as we hope, then Aerofloat may well become the solution for our other plants when existing DAFs reach their end of life.”
  • Chris Christopher - Sunfresh Salads

    My name is Chris Christopher and I am the owner of Sunfresh Salads in South Australia.

    I installed an Aerofloat 100 unit to treat the production wastewater.

    I am impressed with the commitment of the Aerofloat team, and the effectiveness of their product.

    And ultimately… I am now comfortable that I am continuously meeting the SA Water discharge standard.

    I would be happy recommending Aerofloat to similar companies with waste water problems
  • Matt Savage - Apex Environmental New Zealand

    George Weston Foods Auckland bakery needed to reduce the levels of fat, oil and grease in their discharge in order to comply with trade waste laws. With Aerofloat’s support, the treatment facility was able to reduce the levels of suspended solids by 97%, and oil and grease levels by 99%, thereby easily achieving compliance with council regulations.

    In both examples, the compact nature of the Aerofloat system allowed for the installation of additional treatment products on sites that have space constraints.

    The Aerofloat DAF and MBBR systems dramatically reduce the COD in the effluent from dairy processing plants with a simple and economical option - making them the go-to solutions for dairies in Australia and New Zealand.
  • Sam Montalto of Monte Fresco Cheese

    Sam has been working in the cheese-making industry all his life. Two years ago he had a vision of what he wanted his new Sydney factory to look like and called upon Aerofloat’s Michael Anderson to help him to realise his dream. “Michael was able to pull all the pieces together and help me to create exactly what I had envisioned – and all within my budget.”

    “I didn’t want to go with the conventional DAFs. I’ve used them all my life and they generate alot of smell. Aerofloat’s DAF has the waste going into an enclosed chamber so it isn’t exposed.”

    “In my lifetime career working in the dairy industry this is the only DAF that I’ve found that eliminates the smell factor. What’s more, the water board is happy with the end result – and that’s important!”

    Monte Fresco Cheese was awarded a Gold Award at the 2016 Sydney Royal Cheese and Dairy Show for its beautiful ricotta.
  • Karen Neil - Ruby and Roy’s

    Known for their multi-award winning (and utterly divine) yoghurt brand, Ruby and Roy’s, Karen and Simon worked with Aerofloat’s Ray Anderson to install a new DAF system late last year.

    After exploring the products on offer, Karen and Simon felt that Aerofloat would give them exactly what they needed, with the confidence of a job well done and the added bonus of the right price tag.

    Karen muses on the process of finding the right supplier for their business, “Ray made us feel completely assured that we were going in the right direction. We met other suppliers promising improbable results for a lot of money. Ray was never going to leave us with something that was half-done.”

    “Ray is passionate about what he does, and it shows.”

What is Dissolved Air Flotation?

What is Dissolved Air Flotation? Dissolved Air Flotation (DAF) is a common treatment technique used to remove solid particles (typically fats, oils and greases) from wastewater.  The wastewater is generally mixed with suitable chemicals to flocculate the solids particles.  The basic principle is that air is dissolved into a side stream, which is then allowed to suddenly decompress and the main chamber.  This side stream mixes with the incoming flocculated wastewater. The decompression of the side stream causes millions of little bubbles to form as the dissolved air comes out of compression (the same as when you open a can of soft drink). The bubbles tend to form around contaminates in the water and then floats them to the surface where they are captured and removed.

Conventional DAFs use large open tank consisting of mechanical scrapers on the top and bottom of the tank to remove the built up scum layers.  This waste scum layer is then disposed of and the remaining treated water is of a much higher quality.

The Aerofloat DAF has combined these proven DAF principles with some new unique design elements to make a truly innovative product suitable for a range of applications.

The Aerofloat™ technology uses a double hopper tank with a unique, patented hydraulic float removal system to funnel the waste float material from the top of the tank. Mechanical scrapers are not required. The patented system is compact, mechanically simple and a more affordable DAF solution.

The waste material is simply removed from the enclosed, hopper tank by using the hydraulics on the incoming feed stream – see cycle diagram adjacent for further information.

To ensure effective performance of the DAF, most industrial waste plants will require some pre-treatment screening, blending, hydraulic balancing and pH correction.