ac-environnement.com Groupe AC Environnement is a French environmental engineering company founded in 1997 in Pontarlier, delivering integrated solutions for water treatment, wastewater, waste management and bioremediation. With 160 employees across five subsidiaries including GEG, Maraîch'Hydro and Biovéa, it has completed over 120 projects in 13 countries. Its standout project is the STEP des Voraces, France's first large-scale wastewater plant featuring demethanization serving 300,000 equivalent inhabitants. The group offers 26 specialized technical solutions spanning drinking water, industrial effluent, zero liquid discharge and circular economy applications. Led by Johan Hansma, it operates across the full project lifecycle from design and construction to long-term operations and maintenance.