It is urgently necessary for prevention of global warming to utilize a biomass source and new energy positively. From this point of view, authors have operated the combined system of the methane fermentation with food-waste and fuel cell power system at the facility for providing meals to schools. The fuel cell can get hydrogen gas from the mixed gas with popular natural gas and biogas from food waste. 1kW of electric power and heat (hot water) generated from the fuel cell are fed back to the facility where provides the food-wastes. In this study, the distinctive feature concerned to the economic and environmental view will be discussed.
