HYSOLCHEM focuses on the successful validation, at industrial level (TRL 5), of a new concept of low-cost flow photo-reactor prototype for the reduction of CO2 and N2 to produce fuels and chemicals (CH4, C2H4, C3H6 and NH3) coupled to the oxidation of microplastics and organic pollutants from wastewater treatment plants. To achieve this ground-breaking goal, an interdisciplinary consortium has been gathered to tackle the multiple involved challenges in a holistic manner: (i) Design and synthesis of highly efficient and stable photocathodes for CO2 and N2 reduction (ii) Development of low-cost and long-duration anodes for the electro-oxidation of microplastics and other organic pollutants in wastewater (iii) Design and fabrication of cost-effective, selective and photo-stable ion-exchange membranes (iv) Advanced characterisation of materials at different levels with state-of-the-art spectroscopic techniques (v) Integration of developed CO2/N2 reduction photocathodes, waste/microplastic oxidation anodes and ion-exchange membranes in a solar-powered flow reactor for simultaneous water detoxification and CO2/N2 valorisation (vi) Validation of the prototype in a wastewater treatment plant and (vii) study of the developed materials and devices from an environmental, economic and social point of view.