O-01　LCA 手法を用いた廃棄物由来バイオガス利用価値の再評価

抄録

In Japan, the biogas generated by methane fermentation is mainly used for power generation and heat. However, there are other uses for biogas, such as city gas feedstock and car fuel. There are also growing expectations for methane production using hydrogen derived from renewable energy sources. In this study, we will re-evaluate the methane fermentation process through the re-evaluation of the value of biogas with regard to biomass wastes, which have been incinerated so far despite the fact that they are a carbon-neutral resource. As a result, it was found that the CO₂ emission factor of electric power use and the addition rate of propane for calorific value adjustment are significant factors in the CO₂ reduction effect. In addition, as a result of comparing the LCCO₂ between hydrogen-oriented methane and biogass-oriented methane from biogass, the latter (LCCO₂:-0.796kg-CO₂/m³) was superior in terms of the environment.