The immense environmental challenges facing the world now and in years to come can only be met through marshalling the talents of the best environmental engineers and scientists, and through the use of innovative, cost-effective solutions. Written by three leading aeration experts, Aeration: Principles and Practice, covers the principles and practice of aeration, a unit process critical to the performance of activated sludge treatment and to the budget of wastewater plants.

This reference presents the state of the art in aeration, using examples from a variety of facilities in the USA and Europe. The authors investigate conventional and deep-tank aeration systems for BOD removal and nitrification, as well as high-purity oxygen systems. Operating and capital costs, as well as energy use data are presented together with design information allowing the adaptation of new aeration technologies to plants of diverse size.

Both practitioners and advanced students of wastewater management will appreciate the detailed presentation of oxygen transfer principles, especially as they are illustrated in numerous applications. With the information presented in this book engineers and managers will be able to understand and monitor the efficiency of existing aeration systems and to develop strategies for process improvement.

For a basic course in water resources engineering. Also appropriate for more advanced undergraduate and graduate courses and as a reference for practicing engineers.

Designed to provide a broad coverage of pertinent topics concerning water resource engineering, this text focuses on fundamental topics of hydraulics, hydrology, and water management. Water resources engineering concepts and methods are addressed from the perspective of practical applications in water management and associated environmental and infrastructure management. The focus is on mathematical modeling and analysis using state-of-the-art computational techniques and computer software. The text is written to easily adapt to the spectrum of ways that individual courses and sequences of undergraduate and graduate courses are organized at various universities, providing flexibility for the instructor.

Natural and constructed wetlands play a very important role on the landscape and their ecological services are highly valuable. In fact, some wetland types are regarded as one of the most valuable ecosystems on the Earth. Water management, including flood water retention, biomass production, carbon sequestration, wastewater treatment and biodiversity sources, are among the most important ecological services of wetlands. The book is aimed at the use of constructed wetlands for wastewater treatment and for the evaluation of various ecosystem services of natural wetlands. Special attention is paid to the role and potential use of wetlands on the agricultural landscape. The book presents up-to-date results of ongoing research and the content of the book could be used by wetland scientists, researchers, engineers, designers, regulators, decision-makers, universities teachers, landscape engineers and landscape planners as well as by water authorities, water regulatory offices or wastewater treatment research institutions.

This is the second of two volumes that together provide a comprehensive overview of the current sustainable and low-cost wastewater treatment technologies applied in communities that lack the financial and technical resources needed for an environmental, disease prevention and health nexus. This book reviews engineered wastewater treatment technologies and discusses their application in regard to greenhouse gas emissions, natural resource utilization, land-use, and energy and water savings. The chapters from expert contributors cover topics such as aerobic and anaerobic biological treatments, chemical treatments and precipitation, and disinfection. Readers will also learn about simplified and low-energy wastewater treatment plants, strategies for wastewater reuse, and nanotechnologies for wastewater environmental management. The feasibility regarding time and cost of implementing such technologies is also discussed in this book, and particular attention is given to the removal of conventional and emerging pollutants, toxicants, and heavy metals. Given the breadth and depth of its coverage, the book offers an invaluable source of information for researchers, students and environmental managers alike.

A clear, up-to-date presentation of the principles of flow in open channels

A fundamental knowledge of flow in open channels is essential for the planning and design of systems to manage water resources. Open-Channel Flow conveys this knowledge through the use of practical problems that can be solved either analytically or by simple numerical methods that do not require the use of computer software.

This completely up-to-date text includes several features not found in any other book on the subject. It derives one- dimensional equations of motion using both a simplified approach and a rigorous approach, and it explains the distinction between the momentum and mechanical energy equations. The author places great emphasis on identifying the types and locations of the control sections that are essential in analyzing flow profiles, and he includes a section on recently recognized nonunique flow profiles.

Offering numerous worked examples that are helpful in understanding the basic principles and their practical applications, this book:

• Presents the latest computational methods for profiling spatially varied and unsteady flow
• Includes end-of-section exercises that measure and build understanding
• Fully explains governing equations in algebraic and differential form
• Brings sluice-gate analysis completely up to date
• Covers artificial channel controls such as weirs, spillways, and gates, and special topics such as transitions in supercritical flow and flow through culverts

Written in metric units throughout, this excellent learning tool for senior- and graduate-level students in civil and environmental engineering programs is also a useful reference for practicing civil and environmental engineers.

Newport Bay (Orange County, California) is listed by the California State Water Resources Control Board (SWRCB) as a water quality limited receiving water body because of sporadic exceedances of the fecal coliform water quality objectives for body contact recreation. Consistent with federal and state requirements, a Total Maximum Daily Load (TMDL) is being implemented in the watershed. The fecal coliform TMDL in Newport Bay is a phased approach for understanding and controlling the microbiological water quality in the to ensure the reasonable protection of the Bay?s beneficial uses. An important initial step within that TMDL was to assess the impairment of the body contact recreation beneficial use (REC-1) of Newport Bay receiving waters through characterizing the risk of illness associated with REC-1 exposure. A health risk assessment investigation was developed to characterize that risk. The health risk assessment investigation involved the integration of a population based model of disease transmission, a water quality modeling component necessary for estimating pathogen dose as part of the exposure assessment, and site-specific population use and receiving water data collection. The Water Environment Research Foundation funded the water quality modeling component of the health risk assessment investigation, which is the focus of this report. Also provided within this report is an overview of the health risk assessment methodology, a summary of the major findings from the risk assessment investigation, and a discussion of how the health risk methodology may be applied to other watersheds where impairment of the REC-1 beneficial use is in question. The major findings of the health risk assessment investigation indicated that (1) the risk of illness from REC-1 use in Newport Bay, estimated using two separate methods was generally below levels considered tolerable by US EPA, and (2) the reduction of controllable sources of pollution would not appreciably reduce the existing risk. Based on the collection of site-specific exposure data and the health risk characterization, it was determined that evaluating the impairment of the REC-1 beneficial use requires a more rigorous and comprehensive health based approach than that prescribed by the current regulations for recreational waters.

The design of wastewater treatment plants with redundancy to assure a quality end product may be in conflict with efforts to assure effectiveness. Redundancy of major system components is to assure compliance with regulations and protection of the environment and the health and safety of the public and treatment plant staff. However, the capital costs and maintenance associated with redundant equipment does not necessarily enhance facility performance. There are a number of forces driving the level of redundancy in plant designs. Federal and state compliance regulations and the design engineer's past experiences will influence the plant design. To some extent the plant staff may also provide input into the plant design and, therefore, contributes to the redundancy. This report determines alternative methods to address treatment plant redundancy, including examples of methods currently in place and, ideally, insight on the premises leading to these applications. A secondary objective is to identify the similarities and differences in redundancy requirements associated with federal and state regulatory agencies. This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below

With contributions from world-renowned experts in the field, this book explores developments in the transport kinetics, seasonal cycling, accumulation, geochemistry, transformation, and toxicology of arsenic. It details advances in the prevention and control of arsenic and arsenic compounds in the air, soil, and water and offers analytical methods for the detection and study of arsenic in the environment and human body. Providing bioremediation techniques for effective treatment of contaminated water supplies, the book discusses factors that influence the removal of arsenic from water as well as diurnal and seasonal variations in the arsenic concentration of surface water supplies.

Contamination of aqueous environments by hazardous chemical compounds is the direct cause of the decline of safe clean water supply throughout the globe. The use of unconventional water sources such as treated wastewater will be a new norm. Emerging nanotechnological innovations have great potential for wastewater remediation processes. Applications that use smart nanomaterials of inorganic and organic origin improve treatment efficiency and lower energy requirements. This book describes the synthesis, fabrication, and application of advanced nanomaterials in water treatment processes; their adsorption, transformation into low toxic forms, or degradation phenomena, and the adsorption and separation of hazardous dyes, organic pollutants, heavy metals and metalloids from aqueous solutions. It explains the use of different categories of nanomaterials for various pollutants and enhances understanding of nanotechnology-based water remediation to make it less toxic and reusable.

During wet weather events, separate and combined wastewater collection systems deliver substantial amounts of storm water runoff to wastewater treatment plants. Often these flows inundate collection systems and treatment works creating bypasses of untreated or partially treated wastewater. The federal Clean Water Act (CWA), its amendments, and associated regulations have been attempting to address these concerns for nearly 30 years. These regulations, coupled with the wastewater treatment standards under the CWA, are posing immense challenges to the owner/operators of wastewater systems, who are also driven to provide the most cost-effective service to customers. This project (WERF Project 00-CTS-6, "Best Practices for the Treatment of Wet Weather Wastewater Flows") undertook a review of currently available technologies to improve the performance and efficiency of wet weather wastewater treatment and also identified potentially beneficial technologies and methodologies that are emerging in this area. The project report includes the types and characteristics of current technologies and methodologies available to ensure treatment of wet weather wastewater flows. The following are the categories of technologies are assessed in report: vortex separation, enhanced clarification, operational enhancements, flushing systems, and disinfection.

This title offers more than 100 papers originating in 20 countries, covering research on a widening range of methods for recharge enhancement and groundwater quality protection and improvement. These include: bank filtration; aquifer storage and recovery; and soil aquifer treatment, as well as rainwater harvesting and pond infiltration. The emphasis is on understanding subsurface process to improve siting, design and operation and to facilitate use of stormwater and reclaimed water, particularly in water-scarce areas.

This collection of papers explains how knowledge and capacity development can contribute to improved, effective water management with a digest of lessons learned in the areas of development of tools and techniques, field applications and evaluation. The authors are prominent practitioners, capacity builders and academics within the water and capacity development sectors. Capacity Development for Improved Water Management starts with an introduction and overview of progress and challenges in knowledge and capacity development in the water sector. The next part presents tools and techniques that are being used in knowledge and capacity development in response to the prevailing challenges in the water sector, and a review of experience with capacity change in other sectors. In the third part a number of cases are presented that cover knowledge and capacity development experiences in the water resources and water services sectors. This part also presents experiences on water education for children and on developing gender equity. The fourth part provides experiences with the monitoring and evaluation of knowledge and capacity building.

Principles and Practices for Petroleum Contaminated Soils includes some of the best research and practical work done by top researchers in the field-both in industry and academia. It covers fundamental and advanced topics, such as analysis and site assessment, techniques (e.g., vacuum extraction, asphalt incorporation), and case studies. The book will interest anyone working with contaminated soils, ground water, and underground storage tanks. It will also be a valuable reference for regulatory personnel and environmental consultants at all levels.

Recent technical innovations and significant cost reductions have sharply increased the potential for using Membrane Bioreactor (MBR) technology in municipal wastewater treatment. MBR technology displays several advantages compared to the traditional activated sludge processes, such as high effluent quality, limited space requirement and with the possibility of a flexible and phased extension of existing waste water treatment plants. Membrane Bioreactors for Municipal Wastewater Treatment describes the results of a comparative research programme involving four leading membrane suppliers: Kubota (Japan), Mitsubishi (Japan), X-Flow (Netherlands) and Zenon (Canada). Each supplier provided a pilot to represent a suitable scale - right up to full scale. These pilots were operated and optimised in the course of the research programme to achieve the best operating window under different operating regimes. The research focussed on the functionality of the membrane, the biological treatment, membrane fouling, achieved effluent quality, and system operability as well as other factors.In a number of side studies the required pre-treatment, membrane fouling/cleaning, energy usage, effluent quality and sludge processing were also addressed. The comparative pilot research was carried out by DHV Water on location at the wastewater treatment plant at Beverwijk in the Netherlands. STOWA Report

The rapid development of nanoscience enables a technology revolution that will soon impact virtually every facet of the water sector. Yet, there is still too little understanding of what nanoscience and nanotechnology is, what can it do and whether to fear it or not, even among the educated public as well as scientists and engineers from other disciplines. Despite the numerous books and textbooks available on the subject, there is a gap in the literature that bridges the space between the synthesis (conventional and more greener methods) and use (applications in the drinking water production, wastewater treatment and environmental remediation fields) of nanotechnology on the one hand and its potential environmental implications (fate and transport of nanomaterials, toxicity, Life Cycle Assessments) on the other. Nanotechnology for Water and Wastewater Treatment explores these topics with a broad-based multidisciplinary scope and can be used by engineers and scientists outside the field and by students at both undergraduate and post graduate level.

Contents:
Preface, 1. You Are What You Do, 2. Work - What Is It? 3. Collar Colour Doesn't Count, 4. Good Work/Bad Work, 5. Lack of Vision, 6. All Work, But Very Little Ethics, 7. Women In The Workplace, 8. Squeezing Time, 9. Workaholism, Stress and Fatigue, 10. The Work, Spend and Debt Syndrome, 11. Moral Leadership and Business Ethics, 12. The End of Work: Is Rifkin Right? 13. The Failure of Work, 14. The Future of Work

Contents:
Foreword. Acknowledgements. Chapter I: Basic Requirements for Optimization. 1.0 Introduction. 1.2 Personnel. 1.3 Management Structure. 1.4 Plant Maintenance. 1.5 Housekeeping. Chapter II: Assessing Plant Performance and Identifying Defects. 2.1 Observing Plant Operation. 2.2 Raw Water Intake 2.3 Raw Water Metering 2.4 Coagulent Handling. 2.5 Flocculation Systems. 2.6 Settling Basins. 2.7 Filters. 2.8 Disinfection. 2.9 Stabilizaion. 2.10 Checklist for Plant Review Chapter III: Water Analysis for Treatment Control. 3.1 Physical Contaminants. 3.2 Biological Variables. 3.3 Chemical Variables and Contamination. 3.4 Laboratory Analysis. Chapter IV: Improving Plants and their Operation. 4.1 Plant Records. 4.2 Raw Water Intake and Flow. 4.3 Rehabilitation of the Chemical Building. 4.4 Pretreatment Units. 4.5 Filter Rehabilitation. 4.6 Filter Operation. 4.7 Stabilization. Chapter V: Determining Design Parameters. 5.1 Introduction to Bench Scale Testing. 5.2 Design and Process Parameters. 5.3 Equipment and Laboratory Space. 5.4 Testing in the Laboratory for Conventional Treatment. 5.5 Testing in the Laboratory for Direct Filtration. 5.6 Sampling for Determinination of Treatment Plant Performance. 5.7 Pilot Plants. 5.8 Treatment Plant as a Pilot Plant. Chapter VI. Disinfection. 6.1 Choice of Process. 6.2 Health Risks of Chlorine. 6.3 Design of Chlorination Facilities. Chapter VII: Optimising and Upgrading Treatment Plants. 7.1 Applying New Technology. 7.2 Optimizing the Treatment Process and Plant Performance. 7.3 Design Information. Chapter VIII: Optimisation and Upgrading of a Plant from 100 ls-1 to 250 ls-1. 8.1 Assessment of Existing Plant. 8.2 Characteristics of the Upgraded Plant. 8.3 Inlet Chamber. 8.4 Initial Mixing of Coagulant and Raw Water. 8.5 Flocculation. 8.6 Distribution of Flocculated Water to Settling Basins. 8.7 Settling Basins. 8.8 Filters. 8.9 Summary. Chapter IX: Optimisation and Upgrading of a Plant from 1m3s-1 to 2.5 m3s-1. 9.1 Assessment of Existing Plant. 9.2 Modifications Required for Upgrading and Optimisation. 9.3 Design of Modifications. Chapter X: Optimisation and Upgrading of a Plant from 20 ls-1 to 50 ls-1 10.1 Assessment of Original Plant. 10.2 Plant performance. 10.3 Upgrading Parameters Determined by Jar Testing. 10.4 Design of Modifications for Upgrading and Optimization. Appendix I Sources of Further Information. Appendix II. Glossary of Terms. Index.

A pilot study conducted at the Gilze water treatment plant of Water Supply North West Brabant demonstrated that adsorptive filtration has several potential advantages over floc filtration, namely: longer filter runs due to slower head loss development; better filtrate quality; shorter ripening time; and less backwash water use. In existing groundwater treatment plants, the high iron (II) adsorption capacity of the iron oxide coated filter media makes it potentially possible to switch the governing mode of operation from floc filtration to adsorptive filtration. To achieve this two options can be considered: iron (II) adsorption under anoxic conditions followed by oxidation with oxygen-rich water; and adsorption of iron (II) in the presence of oxygen and simultaneous oxidation. The first option might be attractive specifically when two filtration steps are available.

A collection of papers from the international symposium "Underground Infrastructure Research: Municipal, Industrial and Environmental Applications 2001." It explores materials for buried pipelines, pipeline construction techniques and condition assessment methods, and more.

These papers focus on mine and mill tillings and mine waste. The work also contains information on subjects related to: regulations, technical capacities and developments. This guide identifies the current and future issues facing the mining and enviromental concerns.

Sludge treatment and disposal used to be considered part of water and wastewater treatment, rather than a separate subject, but is now seen as an independent field of study, research and development. This book is the first text and reference volume on the subject, aiming to provide a comprehensive coverage of basic principles, methods and the advanced practices of sludge treatment and its safe disposal. The book focuses on those aspects of sludge treatment and disposal, particularly in relation to the environment and economy. Based on its inter-disciplinary approach, comprehensive scope and practical case studies and technical illustrations, this book can be recommended as a resource for students, teachers and practising engineers working in the area of water and wastewater treatment, and sludge treatment and disposal in particular.

Completely revised and updated, the second edition of the bestselling In Situ Treatment Technology adds three new chapters to provide the reader with an even more comprehensive reference source on remediation.

This authoritative book goes beyond discussion of individual in situ technologies by providing an understanding of the geologic foundation, the strengths and limitations of each of the technologies, and the details necessary to implement them. It also integrates all chapters to show how these technologies fit together to make a particular remediation method simultaneously the best technical and the most cost-effective design.

The latest updates from the EPA and DOD, as well the inclusion of new material, affords you the detailed knowledge necessary to design a full-scale treatment system. New in this edition are sections in three of the chapters that provide the specific calculations necessary to design an actual treatment system. In Situ Treatment Technology, Second Edition is a comprehensive reference source.

Provides approaches and methodologies for implementing pollution preve This book focuses on reducing manufacturing and environmental complian Streamlines environmental management and pollution control practices a Containing helpful tables and matrixes that furnish suggestions, ideas, and proven technologies to control pollution and minimize waste Base d on the authorFs first-hand experience as an international consultant, the Handbook of Pollution Prevention Practices is a blue-ribbon refe rence for chemical, civil, environmental, pollution control, pharmaceu tical, metallurgical, and occupational health and safety engineers; au tomotive parts manufacturers; health and safety officers in government and industry; industrial hygienists and toxicologists; environmental regulators; and upper-level undergraduate and graduate students in the se disciplines.

This book represents a milestone. It is the first overall presentation that summarizes the membrane-coupled activated sludge process (MCASP) in its entirety. The volume offers a thorough survey of current know-how, an explanation of the operational MCASP in municipal plants with full-scale membrane modules, and a description of its advantages and disadvantages. A new approach for calculating excess sludge production and oxygen consumption for the oxidation of carbon compounds is discussed. This approach details correct values for various wastewater streams-from very small to very high sludge loads. Derived values are then related to regulatory criteria and process design alternatives. This book also addresses the relationships between the alpha factor and the concentration of mixed liquor suspended solids (MLSS), as well as engineering issues such as: membrane performance, energy requirements, and the removal performance of membrane systems. The findings in The Membrane Coupled Activated Sludge Process in Municipal Wastewater Treatment support the practical applicability of the MCASP to smaller wastewater operations ranging from modest-sized municipal treatment plants to facilities serving only one structure. In addition, the MCASP process is shown to be applicable in water reuse operations. The Membrane Coupled Activated Sludge Process in Municipal Wastewater Treatment demonstrates that sewage treatment problems for various types of waste streams-from rural to suburban-can be solved with MCASP. All the required design and operational data for implementing this technology in wastewater treatment can be found in this book.

This is the only book series devoted to explaining the full range of specialized areas required of water and wastewater plant operators. Each volume is designed to give operators the basic knowledge of a subject needed for certification, licensure, and improved job performance. Checkpoints, self-tests and a final examination with questions based on actual operator certification exams provide a practical review. All books are clearly illustrated with key ideas and highlighted points throughout.
Water Hydraulics: This volume is the first training book to explain water hydraulics in the context of treatment plants, presenting hydraulic theory and calculations in terms of the machinery and unit operations familiar to operators. It covers hydraulics as related to keeping water moving from one unit process to the next, including maintaining proper settling times and settling velocity, and providing lift to higher elevations.