For the last three months, Francesco Pasciucco, PhD student from Università di Pisa, has been seconded in Barcelona to collaborate with AERIS Tecnologías Ambientales, S.L. and Universitat Autònoma de Barcelona into implementing Life Cycle Analysis (LCA) and Life Cycle Costing (LCC) on a RECYCLES suggested treatment trains for combustion gases treatment and valorisation, which consists on adding a two-step biological process after the absorption of SOx –anaerobic sulfate reduction in a UASB reactor followed by sulfide partial oxidation in a CSTR reactor– for the recovery of biosulfur and the production of biogas.