Addressing the two hot topics of what to do with the growing inflow of waste and how to convert it into energy with minimal impact on the environment, this is a timely approach using computational fluid dynamics, optimization and process integration. In each case, this practical work studies energy efficiency and saving options using advanced process and heat integration methodology, evaluating the pros and cons of the solution options presented, before testing them in case studies. Each main chapter concludes with a working session is encouraging readers to test their knowledge by solving a simple problem-related case study. Additionally, one whole section on life cycle assessment analyzes the overall impact on the environment. The whole is rounded off by a look at recent developments in the methodology and equipment, as well as future trends.