_Design and Optimization of Biogas Energy Systems_ presents an overview on planning, implementing, assessing and optimizing biogas systems, from fuel conversion to power generation. The book introduces the fundamental elements of bioenergy systems, highlighting the specificities of biogas systems. It discusses the current state of their adoption at a global level and the challenges faced by designers and operators. Methods for sizing, simulating and modeling are discussed, including prefeasibility analysis, available production processes, integration into hybrid energy systems, and the application of Big Data analysis and game theory concepts. All chapters include real-life examples and exercises to illustrate the topics being covered. The book goes beyond theory to offer practical knowledge of methods to reach solutions to key challenges in the field. This is a valuable resource for researchers, practitioners and graduate students interested in developing smart, reliable and sustainable biogas technologies. * Provides an applied approach to biogas systems, from technology fundamentals, to economic and environmental assessment * Explores control methods and reliability prediction of each system component, including modeling and simulation with HOMER and MATLAB * Discusses the use of Big Data analysis, numerical methods, and Game Theory for plant assessment