Composting is a widely used biological process for the management of some wastes produced in communities and agricultural activities, which have experienced substantial growth during the last few years. Because this and the knowledge of composting has increased, the number of composting facilities has increased tremendously, especially in some European countries. Interest has also increased in several countries in other regions of the world.This book attempts to summarize some of the most important work conducted during the last few years under one cover. The contributions to the publication are made by some of the most qualified professionals in the world and present the information in a clear and objective manner. The readers will find the information very useful and will be helpful in the design of new facilities and organic recycling programs. It features up-to-date contributions by some of the most knowledgeable and respected leaders in the field. It presents clear and objective presentations, which are arranged in such a way that it is not necessary to read the entire book. It provides information that is supported by data, tables and references. It covers most the important aspects of the process including a brief historical review. It may be used by teachers as well as practicioners in the field.