Nick Gray is Director of the Trinity Centre for the Environment at Trinity College Dublin. He has worked primarily in the area of biological wastewater treatment for thirty years, working mainly on full-scale treatment systems, especially the design and operation of reactor processes.

"A good integral overview on the relevant topics related to water usage which are of importance to consider when large scale applications are considered."-- Michel Boesten, University of Groningen, Netherlands"This book ...brings to light the contemporary issues along with the traditional issues associated with the water sector."-- Suresh Renukappa, University of Wolverhampton, UK"I was impressed with Gray’s third edition, and the fourth appears to build on that success. I find it to be a good general overview of water systems and water pollution control and, in a time when students find it hard to buy one specialized book let alone several, this book is broad enough to meet several needs simultaneously."-- Charles V. Shorten, West Chester University, USA

• PrefaceAcknowledgmentAuthorPART IWater resources and ecology1 Water resources and demand 2 Factors determining the distribution of animals and plants in freshwaters3 Basic aquatic ecosystems 4 Microorganisms in pollution control5 Water pollutionPART IIWater quality management and assessment6 Water basin management7 Water quality and regulation8 Water quality assessmentPART IIIPollution control9 Nature of wastewater10 Introduction to wastewater treatment11 Activated sludge12 Fixed-film systems13 Natural treatment systems14 Anaerobic processes15 Sludge treatment and disposal16 On-site and small-scale treatment systemsPART IVDrinking water treatment and supply17 Water treatment and distribution18 Physico-chemical treatment processes19 Drinking water contamination20 Pathogens and their removalPART VSustainability21 Sustainability principles in water managementIndex

Nick Gray is Director of the Trinity Centre for the Environment at Trinity College Dublin. He has worked primarily in the area of biological wastewater treatment for thirty years, working mainly on full-scale treatment systems, especially the design and operation of reactor processes.

"A good integral overview on the relevant topics related to water usage which are of importance to consider when large scale applications are considered."-- Michel Boesten, University of Groningen, Netherlands"This book ...brings to light the contemporary issues along with the traditional issues associated with the water sector."-- Suresh Renukappa, University of Wolverhampton, UK"I was impressed with Gray’s third edition, and the fourth appears to build on that success. I find it to be a good general overview of water systems and water pollution control and, in a time when students find it hard to buy one specialized book let alone several, this book is broad enough to meet several needs simultaneously."-- Charles V. Shorten, West Chester University, USA

• PrefaceAcknowledgmentAuthorPART IWater resources and ecology1 Water resources and demand 2 Factors determining the distribution of animals and plants in freshwaters3 Basic aquatic ecosystems 4 Microorganisms in pollution control5 Water pollutionPART IIWater quality management and assessment6 Water basin management7 Water quality and regulation8 Water quality assessmentPART IIIPollution control9 Nature of wastewater10 Introduction to wastewater treatment11 Activated sludge12 Fixed-film systems13 Natural treatment systems14 Anaerobic processes15 Sludge treatment and disposal16 On-site and small-scale treatment systemsPART IVDrinking water treatment and supply17 Water treatment and distribution18 Physico-chemical treatment processes19 Drinking water contamination20 Pathogens and their removalPART VSustainability21 Sustainability principles in water managementIndex