Organic waste or biodegradable waste refers to all those waste materials which originate from living sources such as plants, animals and microorganisms. They can be broken down into simple molecules like water, methane and carbon dioxide. They can be classified into cattle wastes, food wastes, and municipal solid wastes. Organic waste recycling refers to all those processes which aid in managing organic waste, and converting it into useful matter using various treatments and techniques. Some of the commonly used methods are composting, anaerobic digestion, rendering, immobilized enzyme reaction, rapid thermophilic digestion, and using organic waste as animal fodder. Some of the challenges associated with this discipline are generation of odor and air pollution, accumulation of heavy metals, and formation of bioaerosols. This book unravels the recent studies in the area of organic waste recycling and treatment. It is a compilation of chapters that discuss the most vital concepts, and methods of recycling and treatment of organic waste. This book aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.