The future of our world could possibly depend on the eventual success of alternative and renewable energy technologies on a massive scale. Much of ths work is currently happening in field of biomass energy. Written for engineers, scientists, and researchers working with biomass processes, this book highlights the key challenges and future direction in optimizing waste-to-energy technologies. With a focus on anaerobic digestion biotechnology, the authors, all leaders in the field, present practical processes, systems, and data for this approach.