Wastewater Engineering has its roots in WEF' s Design of Water Resource Recovery Facilities (MOP 8), a long-time fixture on the design engineer' s shelf. As WEF approached how to update MOP 8, the organization decided to do so in a way that would address two significant needs in the water sector. The first was the need for current, nationally applicable, peer-reviewed design standards. The result was Standards for Design of Water Resource Recovery Facilities (WEF 8). WEF 8 is a tool for seasoned design professionals, providing concise coverage of critical design criteria that has been formatted in quick-reference tables and bulleted lists. The second was the need for a wastewater design textbook and reference, as covered by this book. Within the MOP 8 series framework, this textbook serves as the entry point for new wastewater engineers and a primary reference work for practitioners, providing both theory and significant context behind the design parameters covered more briefly in WEF 8. Features and educational tools: Learning objectives for each chapter Example problems with solutions to show students application of the covered content End-of-chapter practice problems for students to put their new knowledge into action Supporting material to assist in learning, such as key terms and a notation table.