Eric Valdés, PhD student from Universitat Autònoma de Barcelona, presented his research on modelling novel sulfate-reducing UASB bioreactors for pigment production industry’s flue gases treatment at the International Conferences “Water Innovation & Circularity Conference (WICC)” and “6th IWA International Conference on eco-Technologies for Wastewater Treatment (EcoSTP 2023)”, which took place in Athens (Greece) and Girona (Spain), respectively. This work, which has been developed mainly through the secondments Eric has performed in Italprogetti Spa, is one of the main topics of RECYCLES WP3 and WP4