Biomass, such as garbage, sewage sludge and livestock excreta, is a renewable energy source which has been viewed as carbon-neutral and has received a lot of attention as an energy resource that can contribute to prevention of global warming and to solving energy issues.
Biogas power generation that generates power from biogas (methane gas) which is obtained by methane fermentation of biomass is a recycling and eco-friendly power generating system. Biomass became subject to the feed-in tariffs (FIT) in July 2012, and the use of biomass has been expected to increase.