The 6th European Conference «Environmental Applications of Advanced Oxidation Processes» (EAAOP6) took place at Portorož-Portorose Slovenia, from 26 to 30 June 2019. Mr Sarasidis Vasilis, member of PHOTOX project team from NRRE/CPERI/CERTH, sucefully presented a poster entitled «REDUCTION OF NITRATES IN A PHOTOCATALYTIC MEMBRANE REACTOR IN THE PRESENCE OF ORGANIC ACIDS» with co-authors P.N. Petsi and K.V. Plakas and A.J. Karabelas.