In the modern energy-demanding lifestyle there is an overwhelming need for exploring sources of energy which are renewable and eco-friendly. Bioconversion of biowaste streams for energy production is an increasingly promising option. Through the biogas value chain, bioconversion presents a very attractive route to valorise various biowaste and enables communities to meet their energy needs, conserve resources and protect the environment. However there are challenges in sustainable implementation of biogas technology. The book has therefore reviewed the biogas value chain from a critical sustainability perspective. It has also covered a detailed case study of the potential of biogas production from biowaste in Kenya and how it influences environmental sustainability. The evaluation of biowaste energy potential and the development of a simple yet effective methodology to assess its sustainability are some of the key issues that this book has addressed. In addition, the book also incorporates a thought provoking analysis of the potential contribution of biowaste-based biogas energy to environmental sustainability from an integrated industrial and domestic case study perspective.