Dissolved Air Flotation (DAF)

DAF Water Treatment Systems

The Right Dissolved Air Flotation System

In the world of wastewater treatment, DAF water treatment systems are proving to be the most popular method for removing insoluble solids and clarifying the water. And DAF systems are an effective process with a versatility that can be applied to many different applications. Many industries use this separation technology for clarification of wastewater. PEWE DAF water treatment systems are optimally designed to remove three main types of contaminants found in both industrial and municipal waste streams. These insoluble organic contaminants are suspended solids (TSS), biochemical oxygen demand (BOD), and fats, oils and greases (FOG). They can also be applied to in-organic constituent removal as well.

PEWE Industrial clients utilize our DAF technology to remove TSS, BOD and FOG as a pretreatment step prior to discharge to a municipal POTW in order to meet permit discharge limits. PEWE Municipal clients utilize our DAF technology primarily for biological suspended solids removal. For both industrial and municipal clients, making the right decision started with selecting a PEWE DAF for their wastewater treatment. The result is efficient liquid/solid separation and clean clarified water.

How PEWE DAF Systems Work

As the name suggests, PEWE DAF water treatment systems work by injecting dissolved air into a wastewater recycle stream. The key is how this is reliably and repeatedly accomplished with minimum maintenance. PEWE DAF systems utilize the efficient Rogue regenerative turbine aeration pump to form 20-30 micron air bubbles. Energy savings result as compressed air is not necessary as the pump will aspirate and pressurize atmospheric air with the clarified DAF wastewater forming “whitewater.” No gas tank, no air compressor, no multi tube and always fouled air octopus!

The PEWE DAF aeration manifold ensures complete “whitewater” saturation of the entire wastewater stream. There the micro-bubbles attach to the insoluble contaminants (TSS, BOD and FOG) in the wastewater and together they rise to the DAF surface and form a floating bed of material or sludge solids. A surface skimmer periodically removes this conglomeration of material or sludge and sweeps it into an internal hopper for further processing.

PEWE DAF System Advantages

Clients benefit with many advantages using PEWE DAF wastewater treatment systems. All PEWE DAF models feature:

  1. Integrated pipe flocculators for effective chemical addition.
  2. Energy efficient regenerative turbine “whitewater” aeration.
  3. Advanced influent stilling well ensuring laminar flow conditions.
  4. Safety recessed variable speed direct drive change & flight for the driest skimmer sludge solids.
  5. Non-clogging air diaphragm pump sludge solids removal.
  6. Enhanced anti-flex take-up frames.
  7. US Patented self-cleaning weir water management.

PEWE DAF water treatment systems yield superior bulk solids removal over traditional, gravity or other competing wastewater clarification systems. Our systems capture insoluble TSS, BOD, and FOG solids before effectively removing them with the minimum energy required. PEWE DAF system efficiency add up to a smaller carbon footprint, making it more environmentally friendly.

PEWE DAF & Innovative Quality

PEWE has specialized in manufacturing premium quality Dissolved Air Flotation equipment since entering the water treatment marketplace back in 2007. We hold US Patents #8431022 and #9962631 for the design of our DAF water treatment equipment, as well as 21 registered trademarks. PEWE is proud to offer our clients the largest array of Dissolved Air Flotation systems on the market today. And PEWE high quality products and systems are designed in-house and produced under tight control.

The entire PEWE liquid/solid separation equipment product portfolio includes wastewater screens, plate settler clarifiers, oil/water separators, sludge solids dewatering filter presses, biological MBBR and control automation. PEWE offers our products worldwide to the Food, Petrochem, Pharma, Metals, Electronics, other industries and the Municipal market. If you’d like to learn more about our selection of DAF water treatment systems, our other wastewater equipment or to discuss your particular water treatment needs, contact us. One of our experienced team members will be happy to help you.

PEWE Aeration Technology

The heart of the aeration technology behind the PEWE DAF is the ROGUE MAX RGT® pump. The regenerative turbine design creates the specific conditions for dissolving air efficiently. Coupled with the PEWE DAF, this super air saturated water releases uniform 20-30 micron bubbles into the flotation system and effectively floats fine suspended solids.