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Dissolved Air Flotation Compact (DAFC)

SOAR TO NEW HEIGHTS

The DAFC is nearly identical to the standard Ellis DAF design. However, an increased height and squared design reduces the amount of floor space required for installation.

SOMETIMES SIZE DOES MATTER

The DAFC was engineered for optimal separation while requiring minimal floor footprint.

SWITCH THINGS UP

Unlike competing separation technologies, minor shifts in feed consistency will not upset the separation process within the DAFC.

The standard Ellis Dissolved Air Flotation (DAF) separator is a time-tested technology that has been installed in hundreds of facilities. Ellis engineers have found that some customers with existing infrastructure and/or limited floor space do not always have the room to house a long and narrow piece of equipment.

Just like the great architects did at the beginning of the twentieth century, Ellis engineers decided to take their designs in a vertical direction seldom seen in the industry. The revised design has a more squared footprint, while maintaining the hydraulic throughput capacity with slightly increased height.

The resulting design is the Dissolved Air Flotation Compact (DAFC) System. It is very versatile and effective for processing industrial wastewater. It very efficiently removes fats, oils, and greases (FOG) and suspended solids (TSS) from the wastewater as well as reducing the biological oxygen demand (BOD) and chemical oxygen demand (COD). FOG and TSS removal rates in excess of 95% are common. Some installations report a 99.9% reduction.

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HOW IT WORKS

 

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As shown above, the idea of Dissolved Air Flotation is as easy as 1, 2, 3.

  1. Preconditioned feed enters the DAFC flowing towards the right (for reference). Most preconditioning is done to stabilize the feed and help solids stick together. Preconditioning varies for every application. Please see chemical conditioning for more information on the various conditioning equipment Ellis has to offer that may improve DAFC performance.
  2. Prior to entering the DAFC the feed is blended in a recycle line with clean effluent discharge that has been entrained with fine air bubbles. For more information on air distribution options please see Available Features and Options.
  3. Gravity will force any heavy solids that will naturally fall out of suspension to immediately drop towards the bottom of the DAFC. The solids are discharged towards the left either with an installed auger or under natural hydraulic force of the liquid in the DAFC.
    Solids that have coalesced with the air bubbles will float to the surface. These floating solids are scrapped towards the left side of the DAFC and collected in a solids chamber. Any clean liquid effluent naturally flows to the opposite side of the DAFC under a baffle and into a separate liquid effluent chamber.

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APPLICATIONS

  • Algae Removal
  • Animal Food Production
  • Dairy & Mil Byproducts
  • Dyeing & Finishing Textiles
  • Energy Production Byproducts Treatment & Conditioning
  • Food Packaging & Processing Byproducts
  • Frozen Food Processing
  • Groundwater Remediation
  • Heavy Metal Removal
  • Industrial & Commercial Laundries
  • Industrial Floor Wash-down Solids Separation and Conditioning
  • Juice Separation and Conditioning
  • Meat Packing & Processing Byproducts
  • Oil & Petrochemical Production
  • Pre-biologic Pressing Treatment/Conditioning
  • Preparation of Parts for Painting
  • Pulp & Paper Production
  • Secondary Biological Solids Removal
  • Secondary Sludge Thickening (Industrial & Municipal)
  • Steel Mill Production
  • Storm Water Runoff
  • Vehicle & Fleet Washing

 

OPTIONAL FEATURES

Materials of Construction Air Distribution Solids Discharge Auger Solids Float Skimming Intake & Discharge Pumping Controls Freeze Protection Covers & Hatches Effluent Chamber pH Adjustment Intake Heat Conditioning OSHA Safety Guards & Catwalks