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Author : Anonim
Publisher : Unknown
Page : 72 pages
File Size : 47,6 Mb
Release : 1992
Category : Bacterial growth
ISBN : UOM:39015039943611
Author : DIANE Publishing Company
Publisher : DIANE Publishing
Page : 66 pages
File Size : 47,9 Mb
Release : 1994-05
Category : Electronic
ISBN : 0788106449
Describes the types of organisms often present in drinking water distribution system biofilms, how biofilms are established and grow, the public health problems associated with having biofilms in the distribution system, and tools that water treatment personnel can use to help control biofilm growth. Glossary of terms, and list of additional resources. Charts, tables and photos.
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 : 40,8 Mb
Release : 2007-01-22
Category : Science
ISBN : 9780309103060
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,Division on Earth and Life Studies,Commission on Geosciences, Environment and Resources,1998 Workshop on Emerging Drinking Water Contaminants
Publisher : National Academies Press
Page : 277 pages
File Size : 41,7 Mb
Release : 1999-09-30
Category : Nature
ISBN : 9780309064323
With an increasing population, use of new and diverse chemicals that can enter the water supply, and emergence of new microbial pathogens, the U.S. federal government is faced with a regulatory dilemma: Where should it focus its attention and limited resources to ensure safe drinking water supplies for the future? Identifying Future Drinking Water Contaminants is based on a 1998 workshop on emerging drinking water contaminants. It includes a dozen papers that were presented on new and emerging microbiological and chemical drinking water contaminants, associated analytical and water treatment methods for their detection and removal, and existing and proposed environmental databases to assist in their proactive identification and regulation. The papers are preceded by a conceptual approach and related recommendations to EPA for the periodic creation of future Drinking Water Contaminant Candidate Lists (CCLsâ€"produced every five yearsâ€"include currently unregulated chemical and microbiological substances that are known or anticipated to occur in public water systems and that may pose health risks).
Author : Edwin E. Geldreich
Publisher : CRC Press
Page : 516 pages
File Size : 42,5 Mb
Release : 2020-07-26
Category : Technology & Engineering
ISBN : 9781000157550
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.
Author : Alex M. Bargmeyer,M. Shirtliff,Phillip W. Butterfield
Publisher : International Water Assn
Page : 108 pages
File Size : 53,8 Mb
Release : 2005
Category : Science
ISBN : 1843399040
Biofilms are ubiquitous in drinking water distribution systems, regardless of the type of treatment or disinfection employed by a utility. In general these biofilms pose no direct health threat unless their growth becomes excessive or pathogens that are inadvertently introduced into a distribution system become part of the biofilm microbial community. While biofilm can cause problems associated with taste and odor or corrosion, the possible presence and persistence of opportunistic pathogens within the biofilm may be the most important concern. Current methods employed to minimize biofilm include the use of residual disinfectants, reduction of organic matter or inorganic electron donors (e.g. ammonia) in the water, use of pipe materials and coatings that reduce the amount of biofilm accumulation, frequent flushing of pipelines, and the practice of corrosion control treatment when corroded iron pipes are present. New strategies for the control of biofilm are being discovered and tested in a wide variety of settings, but generally not within the context of drinking water distribution systems. It is therefore important to investigate the most promising new biofilm control strategies to determine their applicability to the very complex drinking water distribution system environment. The goal of this research was to investigate novel biofilm control strategies and technologies that could possibly be applied to drinking water systems. The intent of the research was to serve as an exploratory look at new control options and determine if any could warrant. Specific objectives of the work included: .Perform laboratory scale investigation of three control technologies using rotating annular reactors to simulate a drinking water distribution pipeline. .Select the most promising technology and test that technology in actual field settings under a variety of water quality and disinfectant conditions.
Author : Dick van der Kooij,Paul W. J. J. van der Wielen,Diego Rosso,Andrew Shaw,Dietrich Borchardt,Ralf Ibisch,Dirk Apgar,Jay Witherspoon,Dominic M. di Toro,Paul R. Paquin,Don Mavinic,Fred Koch,Emmanuelle Guillot,Jean-Francois Loret,Erhard Hoffmann,Hallvard Ødegaard,Francesc Hernandez-Sancho,Maria Molinos-Senante
Publisher : IWA Publishing
Page : 484 pages
File Size : 52,7 Mb
Release : 2013-09-14
Category : Science
ISBN : 9781780400402
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
Author : Soumya Srinivasan
Publisher : Unknown
Page : 206 pages
File Size : 44,5 Mb
Release : 2008
Category : Electronic
ISBN : WISC:89101656056
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 : 44,5 Mb
Release : 2020-02-20
Category : Medical
ISBN : 9780309493857
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.
Author : Anne K. Camper,Warren L. Jones
Publisher : American Water Works Association
Page : 82 pages
File Size : 46,7 Mb
Release : 2000
Category : Biofilms
ISBN : 9781583210512
Author : L. Melo,T.R. Bott,M. Fletcher,B. Capdeville
Publisher : Springer Science & Business Media
Page : 679 pages
File Size : 40,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401118248
Biofilms -- Science and Technology covers the main topics of biofilm formation and activity, from basic science to applied aspects in engineering and medicine. The book presents a masterly discussion of microbial adhesion, the metabolism of microorganisms in biofilms, modelling of mass transfer and biological reaction within biofilms, as well as the behaviour of these microbial communities in industry (waste water treatment, heat exchanger biofouling, membranes, food processing) and in medicine (teeth, implants, prosthetic devices). Laboratory techniques and industrial monitoring methods are also presented. The book is directed at readers at the postgraduate level and is organised as a textbook, containing 11 chapters, a glossary, and a detailed subject index.
Author : Mark W. LeChevallier,Nancy J. Shaw,Darrell B. Smith
Publisher : American Water Works Association
Page : 176 pages
File Size : 46,8 Mb
Release : 1996
Category : Biofilms
ISBN : 9780898678758
Author : Steven Lane Percival,James Taggari Walker,Paul R. Hunter
Publisher : CRC Press
Page : 241 pages
File Size : 48,7 Mb
Release : 2000-05-23
Category : Science
ISBN : 9781420041941
The development of biofilms and their role in public health - particularly drinking water - is often overlooked. Ideal for anyone interested in water related issues, Microbiological Aspects of Biofilms and Drinking Water presents an overview of the public health effects associated with drinking water. It highlights the microbiological aspects relat
Author : Bartram J.
Publisher : World Health Organization
Page : 273 pages
File Size : 42,9 Mb
Release : 2003-11-06
Category : Medical
ISBN : 9789241562263
This text prepared by an international group of experts addresses the 'heterotrophic plate count' test which is widely used in drinking-water assessment: what it detects (and what it does not detect) its direct and indirect health significance and its use in the safety management of drinking water supplies. It includes the consensus statement from an expert review meeting and takes account of the presentations and posters at an international conference on the theme co-sponsored by WHO and NSF-International. It provides valuable information on the utility and the limitations of HPC data in the management and operation of piped water systems as well as other means of providing drinking water to the public. It is of particular value to piped public water suppliers and bottled water suppliers manufacturers and users of water treatment and transmission equipment and inline treatment devices water engineers sanitary and clinical microbiologists and national and local public health officials and regulators of drinking water quality. ...The book will be of great value to the piped public water suppliers bottled water suppliers manufacturers users of water treatment and transmission equipment and online treatment device makers water supply engineers sanitary engineers clinical and water microbiologists national and local public health officials and regulators of drinking-water quality. - Indian Journal of Medical Research
Author : Abigail F. Cantor
Publisher : CRC Press
Page : 192 pages
File Size : 41,5 Mb
Release : 2018-01-08
Category : Science
ISBN : 9781351662994
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
