Repsol is committed to ensuring a reliable supply of water and energy, essential for development and well-being. The company's strategy includes optimizing consumption through efficient operation and design, and increasing the use of alternative freshwater sources. Repsol's TechnologyLab is working on projects to maximize the regeneration and reuse of industrial wastewater, aiming for net-zero freshwater capture by 2050. In 2023, Repsol joined a European consortium to present "R3volution," a project within the Horizon Europe program, focusing on industrial water reuse. The project aims to reuse over 90% of industrial wastewater and recover valuable solutes, enhancing energy integration with residual heat. Spanning from 2024 to 2027, Repsol will validate the solution using refining sector wastewater, operating a pilot ZLD (zero liquid discharge) plant in the Puertollano Industrial Complex. The pilot plant will treat wastewater using a sequence of technologies: ultrafiltration, activated carbon, zeolites, nanofiltration, high-recovery reverse osmosis, and membrane distillation. Additionally, solute recovery from brines will be explored using bipolar membrane electrodialysis. Detailed characterization of the wastewater will be conducted to simulate the proposed sequence before designing and implementing the pilot plant. By 2024, the project will advance in wastewater stream monitoring and sensorization, integrating data into the European project's platform for pilot tracking. Validating this sequence at the laboratory scale will be a crucial step towards developing technically and economically viable industrial wastewater regeneration treatments, contributing to the net-zero freshwater capture goals.