Technical and scientific aspects of biogas production, upgrading, and injection are the main topics of this reference book. The relevant scientific background is explained with comprehensible approaches and examples. In addition, technology-based contents on biogas process engineering, case studies, and country-specific experiences on biogas injection are displayed in detail. Ecological and economic issues are addressed thoroughly. Best practice data from manufacturers and operators are complemented by the latest scientific findings of relevant R&D institutions. All stakeholders in the field of biogas and biomethane will find interesting information for their daily business. The concept of the book was successfully realized in two German editions in 2010 and 2013 and this update is refined with respect to international developments and requirements. To reach this aim a team of international experts have joined the German authors.