This book provides theoretical and practical information on biogas production and upgradation (CBG) in a lucid manner and real-life scenarios. The core topics covered include: (i) introduction to biogas production, cleaning and up-gradation and specifications of biomethane in various countries for different applications; (ii) description of various processes and technologies for the cleaning of biogas; (iii) a detailed information on the technologies for separation of carbon dioxide from biogas to upgrade it to biomethane (CBG), (iv) assessment and comparison of the biogas up-gradation technologies on the basis of various techno-economic factors, (v) design and development of water scrubbing technology and (vi) future prospects of decentralized biogas up-gradation and bottling technology. CBG is a growing field for mitigating climate change, waste management, and disposal. This book provides information on how the biogas up-gradation sector is developing and how it could harness its potential in a decentralised manner. A broad description of technological innovations and developments in the sector has been provided. This book will be of use to students, researchers, professionals, entrepreneurs, municipalities, nodal agencies of state and central governments, CBG Plant owners & operators, etc. It can also be used as a text for professional training, skill development and capacity building for stakeholders.