The EU-funded WalNUT project will develop concepts and technological solutions to re-design the value and supply chains of nutrients from wastewater and brine. Researchers will tailor five pilot plants for nutrient recovery from wastewater and brine by combining multiple process units selected from a pool of technologies. The pilot plants will target highly efficient nutrient recovery and minimisation of environmental impacts, in addition to showcasing the full potential of wastewater and brine as a raw material for biofertiliser production. WalNUT therefore aims to create and disseminate a new paradigm shift from wastewater and brine treatment to resource recovery, which is essential for the EU to sustain industries and societies for the long term.