Unique book covering topics related to the evolving photoreactors concepts, design, and application as well as green synthesis of heterogenous photocatalysts which are the key aspects to facilitate the escalation of bench scale works toward industrial/commercial applications. In this book, the editors present the most up-to-date research on Advanced Oxidation Processes (AOPs) to make the argument that AOPs offer an eco-friendly method of wastewater treatment. In addition to an overview of the fundamentals and applications, it provides ample details of the reactive species involved in AOPs as well as reactor design concepts, thus providing readers with the necessary tools to better understand and implement these methods. Moreover, this book presents some conventional and novel photoreactors equipped with UV/vis lamps for working under solar radiation for wastewater treatment in a laboratory and on an industrial scale, which is an important focus of the book. Readers will find in this book: In-depth coverage of the performance of sustainable eco-friendly and low-cost heterogeneous photocatalysts (biogenic photocatalysts); A state-of-the-art fundamental review of parameters affecting photoreactor designs for the effective performance of reactive species; Identifies, formulates, and analyzes developed processes and technologies to meet desired environmental protection needs of society and formulates solutions that are technically sound, economically feasible, and socially acceptable. Audience, This book will be of interest to academic researchers and graduate students from the fields of environment, chemistry, and engineering, and professionals including environmental managers in industry, water treatment plants managers and operators, water authorities, government regulatory bodies, and environmentalists.