DAF Rental Units for Industrial Wastewater Treatment

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 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
  
  

Evoqua’s RT Rental DAF systems are designed to remove total suspended solids (TSS), biochemical oxygen demand (BOD), and fats, oils and greases (FOG) from a wastewater stream. Contaminants are removed through the use of a dissolved air-in-water solution produced by injecting air under pressure into a recycle stream of clarified DAF effluent.

This recycle stream is then combined and mixed with incoming wastewater in an internal contact chamber where the dissolved air comes out of solution in the form of micron sized bubbles that attach to the contaminants. The bubbles and contaminants rise to the surface and form a floating bed of material that is removed by a surface skimmer into an internal hopper for further handling, while heavier solids sink and are removed by the bottom auger.

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• Evoqua offers three sizes of rental DAFs designed to hydraulically handle flows as shown below.
• Leases are available for any duration of three months or more.
• RT Series packaged DAF systems have incorporated more than thirty years of continuous improvements with multiple installations in a variety of applications.

• Overall Dimensions (L x W x H): 15' - 7" x 6' - 4" x 7' - 2"
• Shipping Weight: 5,100 lbs
• Operating Weight: 16,300 lbs
• Effluent Water: 90 gpm nominal/200gpm max.
• Pressure: Gravity
• Electrical Requirements: 460V/ 3 phase/ 60 Hz/ 31 FLA
• Optional 3HP-10HP pump depending on slude volume and characteristics, as well as customer preferences.
• Service Connections - Inlet/Out/Float: 6"/ 6"/ 4" -150# Flange
• Settled Solids Discharge: 4" Flange
• Recycle Pump: Hellbender HB-90, 15HP
• Active Surface Area: 57 ft
• Nominal Water Volume: 1,260 gallons
• Float Hopper Capacity: 100 gallons

• Overall Dimensions (L x W x H): 20' - 7" x 8' - 5" x 8' - 2"
• Shipping Weight: 8,000 lbs
• Operating Weight: 33,300 lbs
• Effluent Water: 200 gpm nominal/400gpm max.
• Pressure: Gravity
• Electrical Requirements: 460V/ 3 phase/ 60 Hz/ 31 FLA
• Optional 3HP-10HP pump depending on slude volume and characteristics, as well as customer preferences.
• Service Connections - Inlet/Out/Float: 8"/ 8"/ 6" -150# Flange
• Settled Solids Discharge: 4" Flange
• Recycle Pump: Hellbender HB-90, 15HP
• Active Surface Area: 101 ft ²
• Nominal Water Volume: 1,260 gallons
• Float Hopper Capacity: 170 gallons

• Overall Dimensions (L x W x H): 33' - 3" x 10' - 5" x 9' - 8"
• Shipping Weight: 14,100 lbs
• Operating Weight: 83,300 lbs
• Effluent Water: 480 gpm nominal/1,000gpm max.
• Pressure: Gravity
• Electrical Requirements: 460V/ 3 phase/ 60 Hz/ 44.6 FLA
• Optional 3HP-10HP pump depending on slude volume and characteristics, as well as customer preferences.
• Service Connections - Inlet/Out/Float: 12"/ 12"/ 6" -150# Flange
• Settled Solids Discharge: 6" Flange
• Recycle Pump: Hellbender HB-150, 20HP
• Active Surface Area: 239 ft ²
• Nominal Water Volume: 8,450 gallons
• Float Hopper Capacity: 360 gallons

• Complete, skid-mounted design for quick, easy installation
• Rugged 304/316 SS tank design that will not flex and is corrosion resistant
• Integral flocculation tube that is equipped with three chemical injection ports and is designed to provide optimal mixing of coagulant and flocculant chemicals within the recommended flow range
• Safe, simple, reliable design and operation provides superior performance without the use of high maintenance, labor intensive plate-packs that can foul or collapse
• Completely prewired NEMA 4X control cabinet requiring only a single drop of 460V/3 ph power to operate
• An industry-leading HELLBENDER® whitewater system that is both efficient, and eliminates the need for an external air source
• Variable speed skimmer drive
• Large, internal float hopper minimizes pumping requirement
• DAF float hopper is equipped with a float level sensor to enable an optional sludge pump to be started and stopped automatically
• Automated settled solids auger
• Quality drive and pump components for long-term reliability