Aquilair™ is a chemical scrubber which transfers odorous molecules to an aqueous solution. Several stages are required according to the odors to be removed. Washes are acid or basic and also use an oxidant (usually chlorine).
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.