This book highlights current efforts and research on waste management, processing and valorization, particularly in Asia-Africa countries. Chapters 1-2 highlight the overview of plastic waste management and the production of waste plastic oil (WPO). Chapters 3-5 discuss the landfill characterization and application of incineration and composting for waste processing. A new achievement in adsorbent production is highlighted in Chapters 6 and 7 while Chapters 10 and 11 focus on sewage characteristic and its utilization using microalgae. Enzyme production using waste is covered by Chapters 10-12. Chapter 13-14 dedicated to the advances in production of bioenergy. The book concludes with a discussion on life cycle analysis for solid waste management (Chapter 15).