In the negotiated procedure public tender for the supply, installation and commissioning of an anaerobic digestion plant for the production of biogas from organic waste deriving from separate waste collection located in Sant’Agata Bolognese (BO) for a tender amount of around Euro million, of the 60 points reserved for the technical component, 57 were reserved for environmental sustainability aspects with reference to the consumption of thermal energy, electricity, water consumption and process efficiency, and 3 points were assigned to social sustainability in relation to the inspections of the Health and Safety Service.