Aquilair™ is a physical and chemical deodorization process based on the transfer of odorous gaseous molecules to a liquid phase.


Aquilair™ comprises one or more successive washes of polluted air in a counter flow system, via aqueous solutions, in wet scrubbers operating in series. These scrubbers are filled with inert material watered with the chemical solution which enhances the contact between the gas and the liquid.


  • Aquilair™ treats highly concentrated gaseous effluent which may have concentrations of odorous components as high as 1 g/m³.
  • This highly reliable technique enables to achieve treatment yields in excess of 99%, ensuring the total absence of odor-induced pollution.

The scrubber packing material characteristics (type, specific area, volume, depth) are selected to optimize the gas-liquid contact time and molecule transfer.

Aquilair™ comprises one to four chemical scrubbers, usually synthetic resin columns:

  • The first, operated in acid conditions (pH between 2 and 3), is used for nitrogenous compound removal,
  • The second and third, operated in basic conditions (pH 9 and pH 11), with the addition of an oxidant, are dedicated to the removal of sulfide compounds (H₂S, Mercaptans...). When the hydrogen sulfide content of the gaseous effluent is not too high, one tower of this type may be sufficient.
  • The last, into which a reducing agent is added, operated at a neutral pH neutralizes any potential excess of oxidant used upstream.

Aquilair™ modular technology is designed to fit all types of installation, new or the extension of an existing plant. This process can be used on a wide range of flow rates and therefore is suitable for all sizes of wastewater treatment plants.

  • Aquilair™ is a fully automatic process. Active solution recirculation can deal with load variations without affecting the quality of the air discharged.
  • Aquilair™ achieves constant discharged air quality. Its efficiency, higher than 99%, makes it the technology most suitable whenever a "zero nuisance" objective is required.