Occurrence of Bacterial Regrowth and Nitrification in the Raleigh Distribution System and Development of an EPANET Model for Future Assessments PDF Download
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Author:
Publisher:
ISBN:
Category : Bacterial growth
Languages : en
Pages : 142
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Book Description
Author:
Publisher:
ISBN:
Category : Bacterial growth
Languages : en
Pages : 142
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Book Description
Author: AWWA Staff
Publisher: American Water Works Association
ISBN: 1613000294
Category : Denitrification
Languages : en
Pages : 288
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Book Description
This brand new manual was written because of the increased use of chloramine as a residual disinfectant in drinking water distribution systems and the ubiquitous presence of nitrifying bacteria in the environment. Chapters cover background information on the occurrence and microbiology of nitrification in various water environments and provide current practical approaches to nitrification prevention and response. This manual provides a compendium of the current state-of-the-art knowledge, however with quickly developing new advances in nitrification, more writings will be forthcoming. Each chapter can be read independently.
Author: Peter J. Vikesland
Publisher: American Water Works Association
ISBN: 158321478X
Category :
Languages : en
Pages : 168
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Book Description
Chloramines are widely used to maintain a disinfectant residual in water distribution systems, but can result in nitrification. This research documents the effectiveness of free chlorine for the control of nitrifying bacteria, evaluates the effect of pipe materials on nitrifying bacteria, and determines how DPBs change as a result of the switch to free chlorine.
Author: American Water Works Association
Publisher:
ISBN: 9781583214190
Category : Nature
Languages : en
Pages : 292
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Book Description
This new manual provides a compendium of the current state-of-the-art knowledge regarding the increased use of chloramine as a residuals in drinking water distribution systems. Chapters cover background information on the occurrence and microbiology of nitrification in various water environments and provide current practical approaches to nitrification prevention and response.
Author:
Publisher:
ISBN:
Category : Water resources development
Languages : en
Pages : 236
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309133955
Category : Science
Languages : en
Pages : 404
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Book Description
Protecting and maintaining water distributions systems is crucial to ensuring high quality drinking water. Distribution systems-consisting of pipes, pumps, valves, storage tanks, reservoirs, meters, fittings, and other hydraulic appurtenances-carry drinking water from a centralized treatment plant or well supplies to consumers' taps. Spanning almost 1 million miles in the United States, distribution systems represent the vast majority of physical infrastructure for water supplies, and thus constitute the primary management challenge from both an operational and public health standpoint. Recent data on waterborne disease outbreaks suggest that distribution systems remain a source of contamination that has yet to be fully addressed. This report evaluates approaches for risk characterization and recent data, and it identifies a variety of strategies that could be considered to reduce the risks posed by water-quality deteriorating events in distribution systems. Particular attention is given to backflow events via cross connections, the potential for contamination of the distribution system during construction and repair activities, maintenance of storage facilities, and the role of premise plumbing in public health risk. The report also identifies advances in detection, monitoring and modeling, analytical methods, and research and development opportunities that will enable the water supply industry to further reduce risks associated with drinking water distribution systems.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309082951
Category : Science
Languages : en
Pages : 449
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Book Description
The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.
Author: Walter J. Weber, Jr.
Publisher: Wiley-Interscience
ISBN: 9780471017110
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
Providing a comprehensive analysis of the dynamic complexities of environmental systems—both natural and manmade—Process Dynamics in Environmental Systems is a unique, practical introduction to the issues and design mandates central to environmental engineering. An outgrowth of the classic text Physicochemical Processes for Water Quality Control, this new book amplifies and updates the important discussion of process dynamics begun in the original. Designed as a stand-alone reference to every aspect of process dynamics, the current book offers a complete theoretical analysis of the subject as well as numerous practical illustrations of how process models are useful in interpreting and designing a wide variety of process operations. Beginning with a broad overview of the factors and features of environmental systems and processes, the book then clearly details the general nature of fundamental processes, the character of the different types of systems in which they occur, and the way in which these factors influence process dynamics and environmental systems. The book then examines the core elements of process analysis—energetics, reaction rates, and reactor dynamics—and shows how process modeling integrates these elements in quantitative descriptions and in designs of engineered systems. Central to the structure of this book is a detailed analysis of the nature of reaction and transport phenomena—the two fundamental aspects of any environmental system. Including a look at reactions on both a macroscopic and microscopic scale, the book examines the mechanics of macroscopic and microscopic transport processes, outlining mass transport concepts basic to an understanding of reaction phenomena and reactor engineering. Subsequent chapters examine environmental reaction phenomena in the context of chemical species and transformations, including a discussion of energy balances and flows in both single-phase and multi-phase systems. A detailed look at the molecular basis for reaction kinetics in both single-phase and multi-phase systems follows. The book then broadens its focus to reactor dynamics, outlining engineering design considerations associated with reactor systems involving one phase; and then reactor systems involving transformations among and between components in two or more phases. A particularly unique feature of the book is its coverage of process dynamics for reactor systems in which transient conditions occur, at both the macroscopic and microscopic scales. A synthesis of the various aspects of process dynamics forms the book's conclusion, enabling the reader to skillfully apply the concepts of process dynamics to the interpretation and design of environmental systems. An ideal reference/handbook to the theory and uses of process dynamics, the book's practical, instructive format includes detailed example problems, assigned problems with answers, as well as suggested supplementary reading. Useful general appendices are provided, and many individual chapters also feature appendices which address issues specific to the chapter. Featuring a practical, forward looking approach to environmental systems design, Process Dynamics in Environmental Systems is a must for professionals and students interested in building the structures that preserve—and elevate—our quality of life. A blueprint to understanding and designing environmental systems...an authoritative text and handbook for the '90s and beyond Process dynamics is the science of quantifying and predicting the various components and phenomena underlying environmental systems. Designed as a comprehensive teaching text, reference, and study guide, Process Dynamics in Environmental Systems offers a complete theoretical analysis of process dynamics as well as numerous practical illustrations of how process models are useful in interpreting and designing a wide variety of process operations. Beginning with a broad overview of the factors and features of environmental systems and processes, the book then clearly details the general nature of fundamental processes, the character of the different types of systems in which they occur, and the way in which these factors influence process dynamics and environmental systems. The book then examines: The core elements of process analysis—energetics, kinetics, and reactor dynamics—and shows how process modeling integrates these into quantitative descriptions and the design of engineered systems The mechanics of macroscopic and microscopic transport processes Reaction rates in homogeneous and heterogeneous systems Engineering and design considerations associated with reactor systems involving one and two or more phases Reactor systems involving transient conditions at the macroscopic and/or microscopic scales The book's practical, instructive format includes detailed example problems, assigned problems with answers, as well as suggested supplementary reading.
Author: Gregory J. Kirmeyer
Publisher: American Water Works Association
ISBN: 9781583213315
Category : Nature
Languages : en
Pages : 278
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Book Description
This manual recommends optimal operational criteria for chloramine application to enhance and protect distribution system water quality. It examines the chemical characteristics of chloramines, documents the use of chloramines with case studies, and provides planning, design, startup, and monitoring strategies for optimizing the use of chloramines.
Author: Robert Maurice Clark
Publisher: Amer Water Works Assn
ISBN: 9781583218167
Category : Business & Economics
Languages : en
Pages : 400
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Book Description
Rev. ed. of: Modeling water quality in drinking water distribution systems / Robert M. Clark, Walter M. Grayman. 1998.
