Impact Of Distribution System Water Quality On Disinfection Efficacy

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Impact of Distribution System Water Quality on Disinfection Efficacy

Author : Hé́lène Baribeau
Publisher : American Water Works Association
Page : 324 pages
File Size : 48,7 Mb
Release : 2005
Category : Water
ISBN : 9781583214107

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Impact of Distribution System Water Quality on Disinfection Efficacy by Hé́lène Baribeau Pdf

Assesses the impact of dynamic water quality conditions in the distribution system on the inactivation of microorganisms in bulk water. Addresses questions about the usefulness of maintaining a secondary residual and the target level to be maintained. Bridges research related to distribution system water quality with that of microbial inactivation.

Drinking Water Distribution Systems

Author : National Research Council,Division on Earth and Life Studies,Water Science and Technology Board,Committee on Public Water Supply Distribution Systems: Assessing and Reducing Risks
Publisher : National Academies Press
Page : 405 pages
File Size : 45,6 Mb
Release : 2007-01-22
Category : Science
ISBN : 9780309103060

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Drinking Water Distribution Systems by National Research Council,Division on Earth and Life Studies,Water Science and Technology Board,Committee on Public Water Supply Distribution Systems: Assessing and Reducing Risks Pdf

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.

Distribution System Water Quality Challenges in the 21st Century

Author : Michael J. MacPhee
Publisher : Unknown
Page : 216 pages
File Size : 41,5 Mb
Release : 2005
Category : Political Science
ISBN : UOM:39015062582286

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Distribution System Water Quality Challenges in the 21st Century by Michael J. MacPhee Pdf

Offering a high-level view of key distribution system water quality issues that utilities will confront in the coming decades, and a new view of an integrated treatment process, this book covers such topics as microbial regrowth and recontamination, risks associated with release of trace metals from system scale, and impacts of secondary disinfection practices. This resource targets water utility managers, water quality professionals, policy makers, regulators, consultants, and educators.

Long-Term Effects of Disinfection Changes on Water Quality

Author : John E. Dyksen
Publisher : American Water Works Association
Page : 316 pages
File Size : 52,5 Mb
Release : 2007
Category : Water
ISBN : 9781583215357

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Long-Term Effects of Disinfection Changes on Water Quality by John E. Dyksen Pdf

In response to many U.S. water utilities that are considering changing disinfectants from chlorine to alternative disinfectants, this research has been undertaken to gain knowledge of long-term effects.

Microbial Quality of Water Supply in Distribution Systems

Author : Edwin E. Geldreich
Publisher : CRC Press
Page : 516 pages
File Size : 52,7 Mb
Release : 2020-07-26
Category : Technology & Engineering
ISBN : 9781000157550

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Microbial Quality of Water Supply in Distribution Systems by Edwin E. Geldreich Pdf

Hidden problems, buried deep in the pipe networks of water distribution systems, are very serious potential threats to water quality. Microbial Quality of Water Supply in Distribution Systems outlines the processes and issues related to the degradation of water quality upon passage through networks of pipes, storage reservoirs, and standpipes on its way to the consumer. The risks associated with biofilm accumulation, bacteria, and other contaminants are discussed in great detail. In addition to its excellent microbiological coverage of organisms in drinking water and biofilms in distribution systems, Microbial Quality of Water Supply in Distribution Systems provides clear treatments of the technical and public communication issues most commonly affecting the quality of water and water supply systems. The inclusion of numerous case histories in this new book makes it a complete reference source for anyone concerned with water quality and water distribution systems.

Development of Distribution System Water Quality Optimization Plans

Author : Melinda J. Friedman
Publisher : American Water Works Association
Page : 256 pages
File Size : 50,6 Mb
Release : 2005
Category : Water
ISBN : 9781583213889

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Development of Distribution System Water Quality Optimization Plans by Melinda J. Friedman Pdf

CD-ROM contains chapter 4 and appendices A & B.

Pathogen Intrusion Into the Distribution System

Author : Gregory J. Kirmeyer
Publisher : American Water Works Association
Page : 286 pages
File Size : 45,6 Mb
Release : 2001
Category : Drinking water
ISBN : 9781583211021

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Pathogen Intrusion Into the Distribution System by Gregory J. Kirmeyer Pdf

Reports on a project that identifies pathogen routes of entry into water distribution systems and develops monitoring and control strategies for protecting the system. Contains chapters on pathogens and pathways, existing control strategies, transient surge modeling, pressure monitoring, field monitoring, recommended control strategies, and recommendations to utilities. The project was completed by a multi-disciplinary team of engineers and practitioners with funding from the American Water Works Association Research Foundation and the Environmental Protection Agency. The book is not indexed. Annotation c. Book News, Inc., Portland, OR (booknews.com)

Safe Piped Water

Author : Ainsworth R.
Publisher : World Health Organization
Page : 168 pages
File Size : 51,7 Mb
Release : 2004-09-21
Category : Business & Economics
ISBN : 9789241562515

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Safe Piped Water by Ainsworth R. Pdf

This publication addresses the factors affecting the presence and growth of micro-organisms in piped networks as well as the practices of water supply organisations that can directly or indirectly influence them. The book shows that there are often public health reasons for adopting a more proactive approach to many of the traditional practices used in designing, operating and maintaining distribution networks, and to modifying the composition of the water that is fed into those networks.

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

Author : AWWA Staff
Publisher : American Water Works Association
Page : 288 pages
File Size : 48,8 Mb
Release : 2011-01-12
Category : Denitrification
ISBN : 9781613000298

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Fundamentals and Control of Nitrification in Chloraminated Drinking Water Distribution Systems (M56) by AWWA Staff Pdf

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.

Water Distribution System Monitoring

Author : Abigail F. Cantor
Publisher : CRC Press
Page : 192 pages
File Size : 51,8 Mb
Release : 2018-01-08
Category : Science
ISBN : 9781351662994

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Water Distribution System Monitoring by Abigail F. Cantor Pdf

Updated throughout for this new edition, Water Distribution System Monitoring describes the latest water quality monitoring approaches, techniques, and equipment that will assist water utilities for compliance with the "Lead and Copper Rule" as well as address numerous other water quality issues. Water quality data are obtained using the appro

Coliforms in Distribution Systems

Author : Graham A. Gagnon
Publisher : American Water Works Association
Page : 164 pages
File Size : 52,5 Mb
Release : 2007
Category : Drinking water
ISBN : 9781583215418

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Coliforms in Distribution Systems by Graham A. Gagnon Pdf

The objective of this project is to understand the potential mechanisms of antimicrobial resistance of E. coli and opportunistic pathogens under disinfection conditions. The project involves molecular techniques to understand genetic changes in biofilm and suspended bacteria in response to different disinfectant conditions. It examines the effects of using single chemical disinfectants (free chlorine, chloramines, and chlorine dioxide) compared with UV light pretreatment, as well as the impact of pipe material (polycarbonate or cast iron) and E. coli mutations. Field studies include both surface water and groundwater.

Management of Legionella in Water Systems

Author : National Academies of Sciences, Engineering, and Medicine,Health and Medicine Division,Division on Earth and Life Studies,Board on Population Health and Public Health Practice,Board on Life Sciences,Water Science and Technology Board,Committee on Management of Legionella in Water Systems
Publisher : National Academies Press
Page : 291 pages
File Size : 40,5 Mb
Release : 2020-02-20
Category : Medical
ISBN : 9780309493857

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Management of Legionella in Water Systems by National Academies of Sciences, Engineering, and Medicine,Health and Medicine Division,Division on Earth and Life Studies,Board on Population Health and Public Health Practice,Board on Life Sciences,Water Science and Technology Board,Committee on Management of Legionella in Water Systems Pdf

Legionnaires' disease, a pneumonia caused by the Legionella bacterium, is the leading cause of reported waterborne disease outbreaks in the United States. Legionella occur naturally in water from many different environmental sources, but grow rapidly in the warm, stagnant conditions that can be found in engineered water systems such as cooling towers, building plumbing, and hot tubs. Humans are primarily exposed to Legionella through inhalation of contaminated aerosols into the respiratory system. Legionnaires' disease can be fatal, with between 3 and 33 percent of Legionella infections leading to death, and studies show the incidence of Legionnaires' disease in the United States increased five-fold from 2000 to 2017. Management of Legionella in Water Systems reviews the state of science on Legionella contamination of water systems, specifically the ecology and diagnosis. This report explores the process of transmission via water systems, quantification, prevention and control, and policy and training issues that affect the incidence of Legionnaires' disease. It also analyzes existing knowledge gaps and recommends research priorities moving forward.

Global Issues in Water, Sanitation, and Health

Author : Institute of Medicine,Board on Global Health,Forum on Microbial Threats
Publisher : National Academies Press
Page : 328 pages
File Size : 55,7 Mb
Release : 2009-10-25
Category : Medical
ISBN : 9780309138727

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Global Issues in Water, Sanitation, and Health by Institute of Medicine,Board on Global Health,Forum on Microbial Threats Pdf

As the human population grows-tripling in the past century while, simultaneously, quadrupling its demand for water-Earth's finite freshwater supplies are increasingly strained, and also increasingly contaminated by domestic, agricultural, and industrial wastes. Today, approximately one-third of the world's population lives in areas with scarce water resources. Nearly one billion people currently lack access to an adequate water supply, and more than twice as many lack access to basic sanitation services. It is projected that by 2025 water scarcity will affect nearly two-thirds of all people on the planet. Recognizing that water availability, water quality, and sanitation are fundamental issues underlying infectious disease emergence and spread, the Institute of Medicine held a two-day public workshop, summarized in this volume. Through invited presentations and discussions, participants explored global and local connections between water, sanitation, and health; the spectrum of water-related disease transmission processes as they inform intervention design; lessons learned from water-related disease outbreaks; vulnerabilities in water and sanitation infrastructure in both industrialized and developing countries; and opportunities to improve water and sanitation infrastructure so as to reduce the risk of water-related infectious disease.

Water Treatment and Pathogen Control

Author : LeChevallier M.W.,Kwok-Keung A.
Publisher : World Health Organization
Page : 136 pages
File Size : 49,8 Mb
Release : 2004-09-24
Category : Business & Economics
ISBN : 9789241562553

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Water Treatment and Pathogen Control by LeChevallier M.W.,Kwok-Keung A. Pdf

Annotation This publication provides a critical analysis of the literature on removal and inactivation of pathogenic microbes in water to aid the water quality specialist and design engineer in making decisions regarding microbial water quality.