Good wastewater management in quarries is a major challenge for sustainable development. The career of SCAN TOGO, to face this challenge, set up a system of treatment of wastewater produced on the site, before the spill in the receiving environments. This project has been proposed to strengthen the existing treatment system. It aims to sustainably manage wastewater from the quarry using the phytopurification technique, which relies on reactions occurring in natural environments and allows the reduction of pathogens, suspended solids and organic materials such as chemical oxygen demand and biological oxygen demand for 5 days. This technique is made possible by the interactions between the substrate, microorganisms and aquatics plants (Phragmites mauritianus, Typha latifolia, Thalia dealbata, Brachiaria mutica, Pistia stratiotes, Canna indica, Colocasia esculenta, Cyperus alternifolius, Eichhornia crassipes ...). Specifically, the project will make it possible to make a diagnosis on the existing treatment system in order to take into account deficiencies in terms of compliance with the rejection standards in force, to install a phytostation whose performance will be evaluated by results. analysis of treated water and to show the impact of the use of these waters in irrigation.