In today's energy demanding lifestyle, it is clear that there is a gap both now and in the future between energy needs for economic development and the ability of both the traditional and the conventional modern energy sectors to meet up with this need. It is therefore very expedient to explore and exploit new sources of energy, which are both renewable and eco-friendly. Renewable sources of energy contribute to sustainable development in diverse ways.Research in the field of bio-energy production reveals that organic waste generated from farms as well as municipal and domestic waste can be used as good sources of biogas.This book reveals the optimal conditions that give enhanced gas yield. Measurable physical quantities derived from our experimental data agreed with a Monod type kinetic equation. This book will therefore serve as a guide to biogas plant operators