• Book Name: Water Quality Engineering by Benjamin and Lower
• Author: Benjamin and Lower
• Pages: 907
• Size: 29 MB

Water Quality Engineering PDF Free Download

This book has been written primarily as a textbook for a graduate course in physical/chemical treatment processes for water and wastewater. However, it should also be useful to working environmental engineers in providing a thorough and cohesive understanding of processes that would not be easily achieved by reading journal articles. While some introductory material is given for each subject, this book has been written with the assumption that the reader has had previous exposure, by class work or experience, with standard water and wastewater treatment processes. To illustrate specific applications, examples are woven throughout this book and problems are given at the end of each chapter. This book is divided into four parts, as explained below. Part I: Chapters 1–4. This part of this book describes the fundamental tools for investigating and studying water and wastewater treatment processes. It sets the stage for the subsequent chapters by presenting the background that is common to the analysis and understanding of many treatment processes. At the end of this section, the reader should have an advanced understanding of how mass balances are used in continuous flow systems in which reactions occur, and thereby will be able to understand and predict the changes in water quality that occur in such reactors. Details of the construction of mass balances are presented in Chapter 1; descriptions of flow characteristics are given in Chapter 2; the study of reaction kinetics is introduced in Chapter 3; and the material in the first three chapters is synthesized in Chapter 4. These chapters are written in a completely generic manner (i.e., with little attention to the application of the material to specific processes of interest in water and wastewater treatment) to emphasize that the material is usable in a wide variety of situations.

Water Quality Engineering PDF Free Download

Part II: Chapters 5–10. This part of the book describes processes for removing soluble contaminants from water (or, in a few cases, inserting chemicals of interest into water). The processes are used in various applications, from treatment of municipal and industrial wastes to the production of drinking water or high-purity industrial process water. All the major processes that are used broadly to remove soluble contaminants are covered in this section or in the membrane chapter that ends this book. In each case, the emphasis is on fundamental understanding of the process dynamics through an analysis of batch (no flow) systems, followed by the interplay between the reaction kinetics and the flow characteristics of systems in which these processes are often carried out. The effects of process variables (i.e., hydraulic, equilibrium, and kinetic) on process design and process performance are emphasized.

The order of these chapters is such that they build on each other, and on the earlier chapters. Gas transfer is covered in Chapters 5 and 6, because it is usually independent of other processes (even if they happen simultaneously) and it builds directly on the earlier fundamental chapters. Gas transfer is one of the few common processes for which design is always closely related to theory, and so the analysis can be quite fundamental and still provide a picture of how gas transfer is achieved in real-engineered systems. Adsorption (Chapters 7 and 8) has many similarities to gas transfer and is often considered as a possible alternative process to gas stripping for the removal of specific contaminants, so it is presented next. 

Water quality engineering pdf free download.