The book addresses the entire water cycle. The focus is on new technologies/processes (especially in high performance biological treatment), energy recovery, water recycling and reuse. Recommendations with regard to the right technologies/processes for specific situations are provided and a wide range of case studies, especially in emerging markets. In addition, the most modern water terminology with more positive connotations is used. This is especially important in the field of direct and indirect potable reuse (DPR and IPR respectively).