The INFUSION solutions aim to demonstrate and validate on a pilot scale a water purification treatment for landfill leachate and OFMSW liquid digestate based on the perspective of the circular economy, in order to recover resources (biogas, bio-fertilizers, and regenerated water). This system will be based on a treatment that combines various technologies of biological treatment and filtration and will be validated at pilot scale in two waste management centres: Ecoparc 2 in Montcada i Reixac, Barcelona, and COGERSA in Gijón, Asturias.