"Partnering with Arianne is an important step toward our goal of building a new circular economy at scale for the next generation of phosphates production." —Laura Lammers, PhD, founder and CEO of Travertine Post this Arianne's high-quality igneous apatite rock from its Lac à Paul mine in Quebec's Saguenay-Lac-Saint-Jean region will be used as feedstock for Project Greystone. Travertine's phosphate process produces PPA from rock phosphate ore using recycled sulfuric acid to eliminate phosphogypsum waste, w ...