Pumps Unlimited

Box 225, Pringle Bay 7196, South Africa
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Waste Water Treatment

Mazzei AirJection™ sets new standards for oxygen transfer efficiency

Wastewater is pumped through one or more high efficiency Mazzei® Injectors, forcing air or oxygen to aspirate into the wastewater.

Graph: Mazzei aeration vs compressed air diffusion
The resulting gas-water mixture is discharged back into the basin through Mazzei® Mass Transfer Multiplier™ (MTM) Nozzles for greater oxygen transfer.

Features and Benefits

  • Whisper quiet operation - no blowers

  • Low system maintenance - no fouling

  • No limits on water dept

The patented Mazzei AirJection® System delivers dissolved oxygen economically to any depth in water bodies needing complete water aeration.

The AirJection® system produces predictable, thorough aeration without the use of troublesome, expensive, blowers or diffusers.

Key applications are for odour control, activated sludge treatment, BOD/COD reduction, and H2S Oxidation.

The system enjoys a small footprint and safe operation with no moving parts other than a reliable recirculating pump.

Mazzei venturin injector for aeration

Mazzei® Injectors dynamically infuse the affected pressurised water with oxygen. See How a Mazzei® Injector Works

Micro bubbles from  aeration nozzles

It is then delivered to the bottom of the pond or tank, under pressure, through Mazzei's patented Mass Transfer Multiplier™Nozzles that multiply mass transfer in the surrounding water

Please also see "How the cleansing systems works", a winery effluent application and Pumps Unlimited Sites

Pumps Unlimited assists clients with design and recommendations for effluent treatment applications based on water condition and expectations.


  • Can be used to inject air or pure oxygen

  • Resistant to corrosion, erosion, and abrasion

  • Energy efficient oxygen transfer

  • Easily adaptable for many applications - Tanks, Ponds, Lagoons

The Mazzei AirJection® System Delivers

  • Reliable performance with no surface motors, paddles, choppers, rotors, impellers or diffusers with blowers or compressors
  • Economical aeration even in the deepest water
  • Complete aeration with no stratification or oxygen deficient pockets
  • Safe operation with no moving parts
  • Effective, efficient transfer of oxygen into water
  • Small footprint
  • Low capital, installation & operating costs
  • Low maintenance requirements
  • American-made quality
The Bottom Line
  • Oxygen is delivered where it is most needed: at the bottom

    Aeration installation diagram - waste water treatment
  • Mass transfer of oxygen occurs efficiently
  • Components are extremely reliable and virtually maintenance free
  • Reclamation of waste water is now feasible
  • No odour emissions during treatment
  • Construction of deep ponds using less acreage
  • No chemicals.
  • Just turn it on & walk away!

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