The Laboratory of Chemical and Environmental Engineering (LEQUIA) is a research group of the University of Girona (UdG) devoted to the development of eco-innovative water solutions. LEQUIA is a “consolidated research group” recognised by the Catalan Government (2014-SGR-1168) and a member of TECNIO, a network that brings together leading experts in applied research and technology transfer in Catalonia. The group is part of the UdG’s Institute of the Environment (IMA). Research lines are: i) design, operation and control of advanced processes for the biological treatment of urban and industrial wastewaters, ii) valorisation of resources within the water-energy nexus, iii) environmental Decision Support Systems (EDSS) and iv) advanced adsorption/oxidation processes for the treatment of gas and liquid effluents