Atul H. Bari, PhD, is an assistant Professor at the Institute of Chemical Technology Mumbai, Marathwada Campus, Jalna. He obtained his B.Tech (Chemical Technology) degree in 2008 from LIT Nagpur, India; M.Chem. Eng in 2011 and PhD (Chemical Engineering) in 2016 from ICT Mumbai India. His research interests are wastewater treatment, mathematical modelling and simulation, chemical kinetics, crystallization and drying, nanomaterial synthesis. He has published 17 papers and was granted a patent by WIPO (World Intellectual Property organization).Hemantkumar N. Akolkar, PhD, is currently working as Associate Professor in the Department of Chemistry at Rayat Shikshan Sanstha’s Abasaheb Marathe Arts and New Commerce Science College, Maharashtra, India. He is an academician and researcher who has taught for the last 14 years at both undergraduate and postgraduate levels. He has published 55+ research papers in national and international journals and conferences of repute. His areas of interest are heterocyclic chemistry, synthetic organic chemistry, and green chemistry. He is a reviewer of several international journals in chemistry.Navnath T. Hatvate, PhD, is an assistant professor at the Institute of Chemical Technology, Mumbai, at the Marathwada Campus, Jalna. He holds both a Master of Pharmacy and a PhD from the Department of Pharmaceutical Sciences and Technology at the Institute of Chemical Technology, Mumbai. His areas of expertise and research interests include wastewater treatment, the development of novel catalysts, process chemistry, and the application of artificial intelligence and machine learning in drug discovery and development. Dr. Hatvate has published 31 research articles, 26 book chapters, and 4 books.A. K. Haghi, PhD, is a retired professor of engineering sciences and has published 250+ academic research-oriented books and 1000+ research papers in various journals and conference proceedings. His leadership in academic publishing includes founding and serving as Editor-in-Chief of prestigious journals. Professor Haghi’s extensive educational background and supervisory roles underscore his expertise and contributions to the field of engineering sciences. He is currently appointed as Honorary Research Associate (HRA) at University of Coimbra, Portugal.

• Chapter 1- Introduction and Basic Concepts.- Chapter 2- Preliminary Treatment.- Chapter 3-Primary Treatment.- Chapter 4- Secondary Treatment.- Chapter 5- Tertiary Treatment.- Chapter 6-Sludge Treatment and Disposal.