This book explores the potential of citrus fruit waste as a renewable resource for sustainable biofuel production. In the context of rising environmental concerns and the global push toward alternative energy solutions, it presents a timely and innovative approach to converting citrus peels, pulp, and other residues into biofuels, turning agro-waste into a valuable asset. The chapters span a comprehensive range of topics, beginning with the biochemical profile of citrus waste and its suitability for energy conversion. It includes detailed discussions on pre-treatment strategies, enzymatic hydrolysis, microbial fermentation, and thermochemical conversion methods such as gasification. The book also examines emerging technologies, generation of value-added byproducts, economic feasibility, and market trends. Additionally, it addresses regulatory frameworks and future directions in citrus-based bioenergy systems. This volume of the Clean Energy Production Technologies book series is a valuable resource for researchers, graduate students, industry professionals, policymakers, and innovators in the fields of renewable energy, waste management, environmental science, and biochemical engineering.