Interest in anaerobic digestion has increased rapidly in recent years. This book is one of the first to provide a broad introduction to anaerobic digestion and its potential as a viable means to turn agricultural crops or crop residues, animal and other organic waste, into biomethane. "The rapid uptake of anaerobic digestion throughout Europe to achieve energy and nutrient recovery from organic wastes, has led to a commensurate increase in the technical literature around waste digestion. This timely publication provides an excellent synthesis of our present understanding whilst highlighting the outstanding problems. It provides both researchers and practitioners a easy route into this challenging subject area." - Nigel Horan, University of Leeds, and Chair of Aqua Enviro Ltd, UK