New Aeration Device Works Better, Saves Energy and Requires Less Maintenance at Municipal and Industrial Wastewater Plants

Fortrans Inc. is unveiling a new line of aeration devices and mixing systems that require less energy and perform more efficiently over long periods of time.

Fortrans’ patented Dif-Jet ™ devices incorporated into a patent pending distribution and mixing system aerate water above the water surface and then pipe the aerated water to desired depth where the water is mixed and circulated.The pressurized aerated water flows back into the basin and mixes more efficiently than a stream of fine bubbles rising through the water column.

The Dif-Jet™ Aeration Breakdown


Dif-Jet™ systems require less cubic feet of air per minute and less pressure to aerate at depth compared to bottom dwelling aerators that require large high pressure blower systems to overcome the high pressure at 24 to 30 feet. Many OEM wastewater plants must be greatly over designed to cope with aerator fouling. So more aerators are installed than are required resulting in huge costs for blower systems. The blower systems also require VFD drives so the output can be increased as fouling makes the system lose efficiency and this compounds the energy costs associated with the aeration process. Aeration accounts for 40% to 70% of a typical wastewater plants energy cost.

Aeration capacity upgrades are easy and affordable with the modular Dif-Jet™ Aeration systems. Supplying sufficient oxygen to the bacteria is the best way to ensure the wastewater plant avoids bulking and odor problems. Generally, no other chemicals are required to assist thebacterial waste digestion with proper levels of dissolved oxygen.

The Dif-Jet™ aerator is non-fouling unlike aeration discs and diffusers located near the bottom of aeration basins. These fine bubble producing aerators accumulate biofilm, scale and other contaminants that tend to stop up the fine pores that produce the bubbles that transfer air to the wastewater.

The performance curve of these aerators soon forms a “bell curve” that shows the loss of efficiency over time. At some point, the aerators must be cleaned either by drawing down the basin or feeding acid through the aerators to clean. Drawing down an aeration basin at a plant that is treating 5 to 50 million gallons per day may be impossible as there is no storage for incoming wastewater. Adding acid will kill the beneficial bacteria that digest the waste. The activated sludge aeration basin must then be re-seeded with beneficial bacteria.

These problems are eliminated with the Dif-Jet overhead grid system and down leg piping.
Any maintenance is easy to perform with detachable Dif-jet™ Aerators and easy to clean grid piping.

Dif-Jet™ Product Specs


Dif-Jet Wastewater Aeration

  • 6’ long wall mounted system with variable depth down leg piping. Model shown with Pro-Jet
  • Mixing nozzles (optional)
  • Dissolved Oxygen Controller and process DO probe are available
  • Standard 260 GPM Flyght™ submersible sewage pump and 50 CFM Gast™ compressor are included with system.

Dual Dif-Jet™ Floating Aerations Systems are also available. All Dif-Jet™ systems can feed pure oxygen in lieu of air. The Dif-jet system are easy to configure for ozone and no contact chamber required.