Wastewater treatment is a process that involves the extraction of pollutants, removal of coarse particles, and elimination of toxicants from wastewater with minimum impact on the environment.This book introduces the basic concepts of wastewater treatment and outlines the steps and techniques involved in bringing the wastewater to the required quality standard along with resource recovery. The book is intended for students and professionals who have some knowledge of such concepts as environmental chemistry and fluid mechanics and offers information on wastewater treatment technologies, practical strategies, and relevant examples to gaining basic understanding of the process.