Impacts of Fire Flow on Distribution System Water Quality, Design, and Operation

Impacts of Fire Flow on Distribution System Water Quality, Design, and Operation PDF

Author: Jerry K. Snyder

Publisher: American Water Works Association

Published: 2002

Total Pages: 204

ISBN-13: 1583212566

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This report, co-sponsored by the American Water Works Association's Research Foundation and Kiwa of the Netherlands, evaluates the impacts of fire flow requirements on distribution system design and water quality using hypothetical and actual case studies. The report also evaluates alternatives to m

Distribution Water Quality Issues Related to New Development Or Low Usage

Distribution Water Quality Issues Related to New Development Or Low Usage PDF

Author: Yakir J. Hasit

Publisher: American Water Works Association

Published: 2006

Total Pages: 116

ISBN-13: 1583215131

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Many water utilities deal with water quality problems in the distribution system due to low water usage. This study uncovers the many problems of low usage and reports on the variety of mitigation practices used by North American utilities. An included CD-ROM provides decision support software to help utilities systematically weigh the costs and benefits of a variety of best management practices (BMPs) for mitigating the water quality issues caused by low usage and thus cutting down on customer complaints and higher distribution costs.

Drinking Water Distribution Systems

Drinking Water Distribution Systems PDF

Author: National Research Council

Publisher: National Academies Press

Published: 2007-01-22

Total Pages: 405

ISBN-13: 0309103061

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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.

Fundamentals and Control of Nitrification in Chloraminated Drinking Water Distribution Systems (M56)

Fundamentals and Control of Nitrification in Chloraminated Drinking Water Distribution Systems (M56) PDF

Author: AWWA Staff

Publisher: American Water Works Association

Published: 2011-01-12

Total Pages: 288

ISBN-13: 1613000294

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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.

Discolouration in Drinking Water Systems

Discolouration in Drinking Water Systems PDF

Author: Jan Vreeburg

Publisher: IWA Publishing

Published: 2010-08-14

Total Pages: 169

ISBN-13: 1843393751

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Special Offer: KWR Drinking Water Treatment Set - Buy all five books together and save a total £119! Discolouration in Drinking Water Systems analyses the particle-related processes involved in the generation of discolouration problems in the network. To this end, new measuring methods have been developed such as continuous monitoring of turbidity and particle count, the Resuspension Potential Method (RPM), and the Time Integrated Large Volume Sampler (TILVS). With these new methods the discolouration problem can be seen as related to loose deposits in the network. The incidental re-suspension of accumulated loose particles is the main cause of discolouration events in the network. The origin of the particles is mainly the treated drinking water, followed by processes in the network like post-flocculation, corrosion and leaching and biological growth and re-growth. Irrespective of the cause of the particles the accumulation to layers of loose deposits can initiate water quality problems. This book looks at how managing the accumulation is possible through controlling the velocity in the pipes and through removing the loose deposits through effective cleaning.

Encyclopedia of Environmental Health

Encyclopedia of Environmental Health PDF

Author:

Publisher: Elsevier

Published: 2019-08-22

Total Pages: 4896

ISBN-13: 0444639527

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Encyclopedia of Environmental Health, Second Edition, Six Volume Set presents the newest release in this fundamental reference that updates and broadens the umbrella of environmental health, especially social and environmental health for its readers. There is ongoing revolution in governance, policies and intervention strategies aimed at evolving changes in health disparities, disease burden, trans-boundary transport and health hazards. This new edition reflects these realities, mapping new directions in the field that include how to minimize threats and develop new scientific paradigms that address emerging local, national and global environmental concerns. Represents a one-stop resource for scientifically reliable information on environmental health Fills a critical gap, with information on one of the most rapidly growing scientific fields of our time Provides comparative approaches to environmental health practice and research in different countries and regions of the world Covers issues behind specific questions and describes the best available scientific methods for environmental risk assessment

Microbial Growth in Drinking Water Supplies

Microbial Growth in Drinking Water Supplies PDF

Author: Dick van der Kooij

Publisher: IWA Publishing

Published: 2013-09-14

Total Pages: 484

ISBN-13: 1780400403

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Maintaining the microbial quality in distribution systems and connected installations remains a challenge for the water supply companies all over the world, despite many years of research. This book identifies the main concerns and knowledge gaps related to regrowth and stimulates cooperation in future research. Microbial Growth in Drinking Water Supplies provides an overview of the regrowth issue in different countries and the water quality problems related to regrowth. The book assesses the causes of regrowth in drinking water and the prevention of regrowth by water treatment and distribution. Editors: Dirk van der Kooij and Paul W.J.J. van der Wielen, KWR Watercycle Research Institute, The Netherlands

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