Wastewater represents a massive amount of water (13 to 15 million m3 / day in France) that could be used as a potentially worthwhile resource, regardless of seasonal droughts. However, wastewater treatment plants are currently not able to achieve in a cost-effective way a sufficient water quality for its reuse as a resource. Therefore, the development of efficient strategies for further eliminating micropollutants and improving the microbiological quality of water is required in order to meet the European Framework Directive on Water and to overcome future water shortages. In this context, REMemBer is an applied research project that aims to develop a sustainable wastewater treatment technology allowing: (i) the implementation of an innovative compact solution combining both secondary and tertiary treatments within the same process (ii) the improvement of the chemical and microbiological quality of treated water, (iii) the possibility to recycle the treated water, and (iv) a lower footprint and consumption of energy/chemicals . The project is based on the combination of the advantages of membrane bioreactors (MBR) and electrochemical processes in a single innovative unit while overcoming the main disadvantages of both technologies (membrane fouling, mass transfer limitations, etc.). The novelty of the REMemBer project lies in the use of reactive electrochemical membranes (REM) as flow-through electrodes. REM have already been synthesized and showed a strong potential to reduce limitations related to diffusion of pollutants from the bulk to the electrode surface. Based on these promising results, the scientific challenges that will be addressed in this project aim at reaching a new milestone through the implementation of REM in a one-pot process where both the biomass separation and the tertiary treatment would be achieved in a single reactor: a Reactive Electrochemical Membrane Bioreactor (RE-MBR). The objectives are: (i) to favor the electro-oxidation of micropollutants owing to the convection-enhanced mass transport of pollutants, (ii) to improve the disinfection by both electro-oxidation and local pH conditions and (iii) to control membrane fouling. The main scientific and technological challenges for the implementation of a RE-MBR at industrial scale lie in: (i) the development of reactive electrochemical ultrafiltration membranes from microfiltration membranes currently commercially available, (ii) the understanding of (electro)chemical, physical and biological mechanisms at the electrode-liquid interface, which are only slightly described in the literature for this application and (iii) the design and validation of an electrochemical cell allowing optimal control of RE-MBR effectiveness and scale-up for an industrial application. The REMemBer project aims to address these challenges by developing a multi-scale approach combining multidisciplinary experimental analyzes and modeling. The scientific program of the project is divided into five main scientific and technological tasks: REM elaboration, characterization and optimization (WP1); understanding of the mechanisms at the REM-liquid interface (WP2); assessment of global performances and effectiveness of the process at lab-scale (WP3); multi-scale modelling (WP4); development of a demonstrator for technical, economic and environmental analyses (WP5). The project brings together two university laboratories LGE (Université Gustave Eiffel) and IEM (Université Montpellier), an applied research institute (INRAE-PROSE), SIAAP (the Greater Paris Sanitation Authority (public industrial company)) and a small company specialized in development of innovative processes and technology transfer (FIRMUS).