Spatial analysis of feedstock supply and logistics to establish regional biogas power generation: A case study in the region of Sicily

A hypothetical regional biogas power generation system based on multiple biomass feedstocks for the Catania province in Sicily was developed. A three-step approach of data collection, GIS-based analysis, and techno-economic assessment was used to analyze and design the biogas power generation system. Based on the amount of available and useable biomass, the biogas power generation system with a nominal electricity capacity of 3.6 MW-e can convert 211,000 t/year biomass into 15,374,000 m3 biogas, 30,000 metric ton soil amendment, and generate 23.1 GWh-e electricity and 35.5 GWh-e heat per year. The geographic information system (GIS) based analysis determines the size and location of four biogas plants in the system. The techno-economic assessment concludes that the system is able to satisfy 27% of the total agricultural electricity demand in the province and shows excellent economic performance with a discounted payback period of less than 6.5 years for the entire biogas power generation system. The results clearly demonstrate that the regional biogas production system can offer a sustainable solution for renewable electricity generation using agricultural residues and food wastes in Sicily. This study also elucidated that the three-step approach is a suitable method to carry out such analysis and to facilitate establishing biogas plants in different regions.