The selected treatment process included implementing a fluidized-support biological reactor installed upstream of existing lagoons to remove most of the soluble organic pollution. A new grinder and raked bar screen were installed as pre-treatment to remove finer solid particles. Waste retained by the raked bar screen is automatically compacted and bagged. A phosphate removal phase was also added to the process. Finally, the outfall was extended beneath the lake using a directional drilling technique.

The selected technology involved the construction of two (2) aerated lagoons in series. The topography and geology of the Salluit region did not allow the implementation of this technology in a conventional manner. It proved necessary to construct both lagoons by blasting bedrock and using blasted rock as material for dam construction. Granular layers constitute the final cover and an impervious geomembrane upholsters all the underlying layers. Finally, aeration lines carry air downward into the lagoons through blowers installed in the transfer building.