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Dissolved Air Flotation (DAF) Systems

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RT Series Packaged Dissolved Air Flotation Systems

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Discontinued product

RT Series Packaged Dissolved Air Flotation Systems

Discontinued product


​Dissolved air flotation (DAF) is a proven and effective physical/chemical technology for treating a variety of industrial and municipal process and wastewater streams. DAF systems are commonly used for the removal of oils & greases and suspended solids to meet a variety of treatment goals including:

  • Product recovery and reuse
  • Pretreatment to meet sewer discharge limits
  • Pretreatment to reduce loading on downstream biological treatment systems
  • Polishing of biological treatment effluent
  • Thickening of biosolids

One of the most common DAF applications is for the pretreatment of wastewater to remove suspended solids and oils and greases prior to discharge to a municipal sewer or a biological treatment system. For example:

A Pretreatment DAF can be used by an industrial discharger to meet specific limits for oil and grease and/or suspended solids set by a municipality (e.g., to meet a discharge limit of 100 mg/L O&G, etc.).

An industry may need to use a Pretreatment DAF to remove contaminants (e.g., product solids, oils and greases, heavy metals, etc.) that would negatively impact a biological wastewater treatment system downstream.

In most cases, the wastewater contaminants must be chemically flocculated in order for the floatation system to remove them. Pretreatment DAF is used in about every industry class. DAF has proven to be very effective for the removal of biological solids from wastewa+K625ter streams. Some of the advantages over traditional, gravity clarification include:

  • Smaller footprint and more rapid implementation
  • Higher sludge solids content (4%TS vs. 1%TS) resulting in a much lower sludge volume
  • Ability to handle bulking solids that tend to float
  • More reliable effluent quality
Rental Equipment

We can meet your need for an entire temporary treatment system, combined with ancillary equipment. We can provide a DAF as well as mixer tanks, pumps, catwalks, and other wastewater treatment equipment and solutions.

For more information fill out this form to receive a response from our experts.



RT Series packaged DAF systems have incorporated over twenty-five years of continuous improvements with multiple installations in a variety of applications. RT systems provide unique standard features including:

  • Fifteen (15) different models to meet a variety of applications and flow ranges (10 to >2,000 gpm)
  • Complete, skid-mounted design for ease of installation
    (no field assembly required)
  • Rectangular profile for maximum space utilization
  • Rugged tank design that will not flex
  • Superior performance without the use of plate-pack that
    can foul or collapse
  • Quality drive and pump components for long-term
  • An industry-leading HELLBENDER®‰ whitewater system
    that is both efficient and simple to use
  • Large, internal float hopper eliminates the need for an
    external float tank
  • Standard RT series options include:
  • Available in 304 or 316 SST tank construction
  • Recycle Piping available in PVC, CPVC, 304 SST,
  • Several controls platforms (Motor Starter, Relay Logic,
    Integrated Controller, Allen Bradley PLC/HMI)


Aerobic Treatment System Type
  • Separation/Clarification

Dissolved Air Flotation: Applications and Design Best Practices

Designed as a learn-at-your-desk over lunch, this quick 30-minute webinar skips the 'what is a DAF' and goes right into the 'how-to' and why as it relates to Pre-treatment, Biological Solids Clarification and Phosphorus Removal. You will walk through 3 case studies which highlight each of these ideas to learn how best practices were put into place. Presented by two long-time DAF experts.

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