Water Treatment Principles and Design Third Edition

Abstract

During the 27 years since the publication of the first edition of this textbook, many changes have occurred in the field of public water supply that impact directly the theory and practice of water treatment, the subject of this book. The following are some important changes: 1. Improved techniques and new instrumental methods for the measurement of constituents in water, providing lower detection limits and the ability to survey a broader array of constituents. 2. The emergence of new chemical constituents in water whose significance is not understood well and for which standards are not available. Many of these constituents have been identified using the new techniques cited above, while others are continuing to find their way into water as a result of the synthesis and development of new compounds. Such constituents may include disinfection by-products, pharmaceuticals, household chemicals, and personal care products. 3. Greater understanding of treatment process fundamentals including reaction mechanisms and kinetics, through continued research. This new understanding has led to improved designs and operational strategies for many drinking water treatment processes. 4. The development and implementation of new technologies for water treatment, including membrane technologies (e.g., membrane filtration and reverse osmosis), ultraviolet light (UV) disinfection, and advanced oxidation. 5. The development and implementation of new rules to deal with the control of pathogenic microorganisms, while at the same time minimizing the formation of disinfection by-products