An introduction to biogas and biomethane

Biomethane is a pure form of biogas and in this pure form can be used a natural gas substitute. The biomethane is a natural gas formed in an anaerobic process which is the decomposition of organic matter without oxygen access. This chapter briefly introduces the biogas technology overview, technological aspects of biogas production such as anaerobic fermentation requirements and conditions of the fermentation processes. Moreover, the chapter introduces one of the most challenging aspects of biomethane feed-in: Biogas purification and upgrading technologies, climate changing aspects, biomethane contaminants, and VOSviewer literature overview.