Miguel Guate defended his doctoral tesis “Catalytic reduction of nitrates on polymeric membranes. Modelling and experimental validation”, developed in the Chemical & Biomolecular Engineering Department of the University of Cantabria, supervised by Prof. Inmaculada Ortiz and Dr. Alfredo Ortiz. The academic event took place through Skype Business on July 17^th, 2020. The evaluation committee was formed by Prof. Daniel Gorri (University of Cantabria), Prof. Carmen Rangel (LNEG, Portugal) and Dr. Víctor Manuel Ortiz (Universidad Politécnica de Cartagena).