David-Alexandre Desrosiers

David-Alexandre Desrosiers is currently a PhD candidate at Université Laval, where he started in 2016. During his bachelor’s degree, he did an internship with Rio Tinto, Niobec and conducted research on water treatment. He completed his degree in chemical engineering in 2020.

He then did a master’s degree on the modelling and optimization of an ion exchanger resin regeneration solution for water treatment. He experimented with wastewater from an aerated pond to demonstrate that the optimized solution was effective in eliminating the biofilm that formed on the resin. Finally, he developed a pilot adsorption system that could not be put into operation because of the COVID.

In 2021, Desrosiers decided to refocus his research on mining for his PhD. His interests are mineral liberation, data reconciliation, process control and modelling. He is currently working on reconciling low-resolution high-frequency liberation measurements with highly accurate low-frequency measurements. These reconciled states will make it possible to limit the dilemma between liberated particles that are too fine or too coarse and those that are not liberated. In addition, it models the effect of reagent concentration on the flotation kinetic constant in order to increase the number of variables manipulated for control purposes.