摘要
Organic waste recovery makes a valuable contribution to resources rationalization and to environmental sustainability. Organic residual matter, which makes up approximately 30 – 40% of waste in general, when subjected to anaerobic digestion processes, produces a considerable quantity of renewable biogas, which can be used for energy, helping to reduce the use of fossil fuels and reducing waste production. The biogas, then used to supply technologically advanced energy systems, adds to current environmental sustainability thanks to the waste avoided as well as to energy efficiency and the reduction of pollution.This work focuses on energy recovery from residual organic biomass, particularly from food products in large distribution centers beyond their sell-by date and edibility.A procedure is reported for dimensioning a trigeneration energy system consisting of anaerobic reactor-primary plants for electricity and heat production-refrigeration plants for cooling energy generation, fed with the above organic compounds. The system is aimed at energy autonomy of a user in the tertiary sector. The phases sequence initially provides for user energy characterization, for the detection of electrical, thermal and cooling adsorptions, which is of primary importance for the identification of plants by type and size.The range of possible energy systems is then examined by means of energy-environmental analysis, necessary to understand the behavior of these systems when fueled with biogas. In particular, the focus is on Micro Gas Turbines, in Internal Combustion Engines and the High Temperature Fuel Cell in a cogeneration layout. In sequence, the cooling energy systems fed with the electrical and thermal energy surplus of the primary ones are then analyzed as compression and absorption systems.A case study, reported in the second paper, Part Two, thus allows the procedure to be tested.