WSI International
WSI International
Wastewater Treatment and Equipment

Fully Packaged
​Dissolved Air Flotation Systems (DAF)
​For Rent and Purchase

The R-75 DAF was originally designed for use in the mining and the oil & gas industry. Over the past couple of years, it's become apparent that it's robust heavy-duty frame and integrated components are perfect for emergency industrial pretreatment scenarios. We've deployed the R-75 to several customers that were out compliance on their discharge permits. The DAF is capable of running autonomously and can remove 99% of solids.The DAF can process 500GPM of water.

What's Included on Each DAF

  • 500 GPM Influent Pump
  • Dual 500 GPM Effluent Pumps
  • Dual KTM65S DAF Pumps
  • Dual Sludge Discharge Pumps
  • Heavy Grit and Solids Pump
  • Nitrogen Conversion System
  • 80 Gallon Air Compressor 
  • Level Sensors
  • Influent Flow Meter
  • Polymer Batching System
  • Chemical Metering Pump
  • Chemical Flow Meter
  • Integrated Controls 
  • 4G Communication  Equipment


    The controls have been designed by field engineers and operators for "real-world" scenarios. They come completely integrated with optimal presets, SMS and email alarms, built-in security, and 4G remote access.


    The unit is equipped with a flow meter and monitoring software to keep you in compliance. The data is logged in a local database and can be emailed directly to any regulatory agency.

    Piece of Mind

    With tens of thousands of hours in field operational time, the R-75 is one of our most reliable DAF systems. It is fitted with 24-hour duty rated pumps and has several built-in residencies.


    WSI offers three levels of support packages the fit your needs. Our primary support avenues include; phone, email, and field support. You will also get access to our massive online knowledge base.

    Packaged DAF Remote Controller

    Remote Controls

    WSI International is committed to providing its customers with the most advanced technology solutions for their wastewater treatment needs. We understand the importance of being able to access and control your wastewater treatment system from anywhere in the world, which is why we have developed our remote access technology. With this technology, you can access your WSI modular system using a mobile device, computer, or tablet, giving you complete control over your system from anywhere in the world.

    With our remote access technology, you can adjust settings on the fly, making it easier for you to control your system and respond to any changes in real-time. Whether you need to make changes to the treatment process, adjust pump settings, or monitor system performance, you can do it all from the convenience of your mobile device, computer, or tablet. This technology also allows you to gather analytics for compliance, so you can ensure that your system is operating within the required regulations and standards.

    The possibilities with our remote access technology are endless. You can monitor system performance, gather data for reporting, and make changes to the system from anywhere in the world, giving you complete control over your wastewater treatment system. With our remote access technology, you can ensure that your system is operating at its best, even when you're not on site.

    Experienced Operators and Support

    All of our engineers and operators have over 10 years of field experience. Their support and knowledge come unmatched to anyone else in the industry and they will be there from startup to shutdown. We are open with our engineering knowledge and experience. Anybody can browse our massive database for drawings, troubleshooting guides, maintenance manuals, and cut sheets. 
    Wastewater Operator

    About Dissolved Air Flotation (DAF) Technology

    The DAF unit acts to remove the suspended solids (TSS) from the wastewater source. The DAF pump recirculates DAF effluent and flash mixes it with ambient air (aspirated on the suction side of the DAF pump). The air dissolves into the effluent under the pressure of the pump.

    The air-water solution is then passed through a saturation tank to allow additional time for the air to dissolve and to remove any coalesced air bubbles. The solution is then expanded across diaphragm control valves leading into WSI’s proprietary diffusers inside the body of the DAF. By reducing the pressure of the solution rapidly (expanding), the dissolved air is forced out of solution in the form of micro-bubbles (90% of the bubbles formed are less than 10 µm in diameter).

    The small bubbles collect under the biomass floc and float it to the surface, forming a thickened sludge blanket on the surface of the DAF that is raked directly into a sludge holding tank. The DAF provides greater thickening of the sludge as well as a reduced footprint from a conventional clarifier. Settled sludge is periodically pumped to the sludge holding tank via a Seepex progressive cavity pump.

    Why choose WSI?

    WSI International has been designing industrial and municipal wastewater treatment plants and wastewater equipment for over 30 years. We are currently maintaining over 80 plants around the world.

    • Safety & Compliance Ensured
    • Start-to-Finish Solutions
    • Superior Service
    • Sustainable
    • Trained Professionals
    • On-Time Delivery
    • All Stainless Steel Designs
    • Reliable Technology

    Operational Excellence

    WSI has high customer loyalty, we've worked with partners for over 20 years and counting. WSI also provides the best technical support in the industry.


    Contact WSI

    WSI International is dedicated to ensuring compliance with local and regional standards without compromising on the quality and efficiency of the products we deliver. 

    To know more about our services and how we can help with your wastewater treatment needs, kindly contact us via any of the options below. An experienced member of our team will respond shortly.

    Working Hours

    Weekdays : 7am to 4pm

    Weekends : Paid Support



    469 W. Wesley Ave

    Denver, CO 80223

    Phone: (303) 985-0885


    77 West St, Suite 305

    Annapolis MD 21401
    Phone: (443) 320-0211

    Contact Us Online