We are pleased to invite you to the 17th World Congress on Anaerobic Digestion to be held at the University of Michigan in Ann Arbor, Michigan, USA in June 2022. This international conference supported by the IWA Anaerobic Digestion Specialist Group is an event to discuss recent advances in anaerobic digestion and related processes. The theme of the 17th World Congress on Anaerobic Digestion is “Biogas and Beyond: Expanding Applications of Anaerobic Biotechnologies in a Circular Economy.” The event is co-chaired by Lutgarde Raskin (University of Michigan) and Adam Smith (University of Southern California). The University of Michigan is located in Ann Arbor, Michigan, in close proximity to the Detroit Metropolitan Airport, one of the world’s leading air transportation hubs with more than 1,100 flights per day to and from four continents.