Current advances in technology have driven forward the harnessing of waste biomass for alternative fuels to help and protect our environment by decreasing our dependence on fossil fuels. Bioenergy: Process, Technology and Viability provides a broad overview of the subject, focusing on the mechanisms of different waste to energy technologies (WTE), rather than giving detailed explanation of each and every process. The authors have taken care to include most recent WTE process in this text book. This book covers all types of biomass resources on a global scale, making it unique. One way of using energy efficiently is to use biomass in biorefineries and methods used for energy conversion has been discussed in detail with engineered diagrams. The problem with biomass to bioenergy is cost, hence in this book techno economic consideration for different WTE process were described in detail. This book highlights and elucidates challenges in biorefineries, key issues and socio economic problems faced by WTE. This book will provide facts and discussion to professionals, scientist, and students as as well as to those working for various government and private bodies.