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Eco-lift retrievable aeration grid

Overview Specifications Solutions Documentation & Tools


Product Features
  • Utilizes Xylem's Silver Series II, the most reliable, energy efficient, and effective diffusers in the industry
  • Enables single basin design
  • Simplifies maintenance - maintain grids with basins in service
  • Revolutionary tube-in-tube design reduces buoyant factors by 60%
  • High safety factors with a minimum of 1.5

Delivering superior aeration efficiency to wastewater treatment plants

​Xylem’s Sanitaire Eco-lift retrievable aeration grid features an innovative design and utilizes high efficiency Sanitaire Silver Series II diffusers, reducing both the capital and life cycle costs associated with aeration systems.

Fine bubble diffusers are much more efficient and reliable than both mechanical aerators and tubular membrane diffusers.

The Sanitaire Eco-lift retrievable aeration grid is designed with the diffusers mounted on structural frames which can be lifted out of the basin for easy inspection and maintenance without having to disrupt the wastewater treatment process. The grid is a cost-efficient alternative to constructing a parallel treatment train.

Revolutionary tube-in-tube design lowers costs

​The Eco-lift retrievable aeration grid uses a patent-pending ‘tube-in-tube’ design which requires significantly less steel as ballast to keep it under water than alternative products. This lowers the cost of the product by up to 50%, compared to Xylem’s former designs, and results in higher and faster return on investment. In addition, Sanitaire Silver Series II diffusers offer the highest Oxygen Transfer Efficiency (OTE) and mechanical reliability when compared to tubular diffusers, mechanical aerators or other types of aeration systems, saving wastewater treatment plants millions of dollars over their life span.

Suitable for both municipal and industrial wastewater applications, Xylem’s Eco-lift retrievable aeration grid frames are constructed of carbon steel I-beams or stainless steel square tubes which produce a more flexible and stronger structure than a frame constructed of concrete. This frame acts as ballast to keep the aeration grid down on the floor of the aeration basin. A standard aeration grid with innovative tube-in-tube design is then mounted on this steel structure. In applications where a retrievable grid is not required, the aeration grid is mounted onto the aeration tank floor.

Two types of lifting mechanisms are available: a lifting cable arrangement with a central mast to retain the cables above the water line and keep the cables taut, or four tubular lifting arms connected to each other at a central location above water level with a ring attached on top to easily lift the grids.



General Information
Ecolift retrievable aeration grid
Conventional Activated Sludge, MBR, SBR, Oxidation Ditches, Channel Aeration, Aeroboc Digesters
Shop oxygen transfer test
Performance warranties
Sanitaire Silver Series II membrane disc diffusers, Silver Series II LP membrane disc diffusers, Xeramic ceramic disc diffusers, and Ceramic disc diffusers
Safety factor
Typical 2 (Minimum)
System Components
Ecolift retrievable aeration grid
Lifting structure
Epoxy coated CS, 304 SS, 316 SS
304 SS, 316 SS, EPDM
Distribution header
304 SS, 316 SS
Liquid purge system
Manual or Automatic Available
Controls (optional)
OSCAR process performance optimizer
Blowers (optional)
Positive displacement or centrifugal
SaniClean liquid cleaning system (optional)
Safe diffuser DWP recovery system
Grid Properties
Ecolift retrievable aeration grid
Typical grid elements
C-Channels or I-Beams
Typical grid structure
Closed rectangular (No breakage)
Special feature
Patent Pending Low Buoyancy design reduces ballast requirement


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Documentation & Tools

Documentation & Tools