The project " SP2R " (Sustainable Phosphate Recovery and Re-uses” aims at establishing, around a French leadership, an European partnership of professionals and structures the activities of which develop in the field of the use of the Phosphor and mainly Phosphates (P-PO4). This network will have for objective to implement innovative strategies for a sustainable management of P-PO4, integrating all the practices and the users, since the individual practices until the intensive activities, at every level of scale. This approach joins in the concept of circular economy which aims at to find solutions, by working at every level of the production line and the consumption, by looking for it more thrifty common strategies. This challenge meets one of the priority of the European program H2020, in the action SC14-2016-2017 "Innovative Actions for a more effective management of raw materials" of the societal challenge "Climate, efficiency of the resources and the raw materials". Our global approach of the problem of inventory managements in P-PO4 will associate skills, know-how and multidisciplinary controls of work with synergic answers to the economic, technological and scientific challenges. It is in this spirit that we wish to make our contribution to the European level in the management of a resource P-PO4, essential in the life but also the cause of environmental concern (diffuse pollution, eutrophication of lakes). More precisely, the objective of our consortium is to slow down the impoverishment of stocks, to limit the economic dependence of the non-producing consumer countries, to reduce the irremediable emissions of phosphates and so to limit the pollutions, to develop more effective technologies of recovery and recycling of the P-PO4, better adapted to the various sources of waste, to master better the life cycle of the used P-PO4. Knowing that more than 89 % of phosphates is used for agricultural applications and of food production, the 1st stake is to optimize and to develop technological processes for a total recovery of the P-PO4 stemming from liquid waste and from solid. We shall answer the scientific and technological challenges (weakness of the efficiencies on conversion and still too high energy current cost of the processes of chemical and biological dephosphatation, division into sectors of the solutions) by innovative strategies of traceability of the P-PO4 on all these activities, use of anion exchange inorganic membranes presenting extremely high selectivity towards phosphates. These materials (Layered Double Hydroxides (LDH), Green rusts (LDH FeII-FeIII) and calcined by-products) will be implemented, in an innovative way, as membranes or reactive suspensions for P-PO4 sequestration. The technology will be adapted to every type of effluents and will allow the separation of the P-PO4 immobilized and concentrated for later stages of reformulation. These P-PO4 loaded solids will be tested for their P-PO4 release performance, under field conditions, to estimate and optimize their fertilizing power. Finally, these LDH and green rusts phases can be integrated as activators into bioreactors designed for the conversion biomass of organic phosphates, according to one conditions operating already highlighted in laboratory. The support of the program MRSEI, will allow us to strengthen our already strongly multidisciplinary consortium, joined by an international industrial group (SAUR) of the domain of the water treatment and cleanup, by going to look for the missing partners (branch of industry, sector of the agricultural research, the industrialists of the chemistry) and identifying even better all the stakes and the bolts to build an ambitious answer as high as the challenge.