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Author : Dawne M. (Dawne Marion) Skinner
Publisher : National Library of Canada = Bibliothèque nationale du Canada
Page : 286 pages
File Size : 42,8 Mb
Release : 2003
Category : Electronic
ISBN : 0612891585
Author : Hé́lène Baribeau
Publisher : American Water Works Association
Page : 324 pages
File Size : 43,9 Mb
Release : 2005
Category : Water
ISBN : 9781583214107
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.
Author : John E. Dyksen
Publisher : American Water Works Association
Page : 316 pages
File Size : 42,6 Mb
Release : 2007
Category : Water
ISBN : 9781583215357
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.
Author : Michael J. MacPhee
Publisher : Unknown
Page : 216 pages
File Size : 41,8 Mb
Release : 2005
Category : Political Science
ISBN : UOM:39015062582286
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.
Author : Edwin E. Geldreich
Publisher : CRC Press
Page : 516 pages
File Size : 53,8 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 : Claire Quinn
Publisher : National Library of Canada = Bibliothèque nationale du Canada
Page : 310 pages
File Size : 53,5 Mb
Release : 2004
Category : Electronic
ISBN : 0612913260
The effectiveness of UV disinfection at two Ontario drinking water facilities during sub-optimum water quality conditions was studied. The disinfection performance of a pilot-scale low pressure UV reactor, delivering a reduction equivalent dose of 60--90 mJ/cm2, was not negatively impacted by either pre- and post-filter water quality conditions experienced at the two treatment facilities. Enmeshment of coliforms within particles, resulting in reduced inactivation levels did occur in samples of raw water from one facility that were coagulated with alum and alum+polymer at turbidities>6 NTU and exposed to low UV dosages (& le;10 mJ/cm2). No evidence of coliform enmeshment was observed in tests that examined raw water coagulation with STERNPACRTM/activated silica/sand/LT27A. No conclusive evidence was observed that would relate changes in inactivation efficiency as a result of bacterial enmeshment to turbidity or particle count data.
Author : R. Narasimhan
Publisher : IWA Publishing
Page : 316 pages
File Size : 41,9 Mb
Release : 2006-06-30
Category : Science
ISBN : 1843399458
Historically, reclaimed water systems met water quality and public health related standards at the end of the treatment facility prior to entering the distribution system. However, water quality within the reclaimed water distribution system can significantly change and affect end uses due to changes in levels of color, odor, and biofilm growth. Operations staff need guidance to help them optimize the reclaimed water quality in the distribution system throughout the year. The objectives of this project were to: characterize the nature and extent of water quality deterioration in reclaimed water distribution systems, including microbial fouling, regrowth, impact to the end user, and impact on reuse and other related regulations; identify pertinent water quality issues in relationship to degradation as it is conveyed to reuse customers; develop general guidance for use by reclaimed water utilities in identifying and assessing problems; and provide options for controlling regrowth including regulating detention time, flushing, and optimization of disinfectants. The final report includes a summary of state reclaimed water regulations and federal guidelines, and other related regulations. The research team put together a final report that provides general guidance for use by reclaimed water utilities in assessing and solving potential problems. Guidance for operation, monitoring, and maintenance of reclaimed water systems to improve quality for end users. Biofilm control methods such as pipeline flushing, shock chlorination, and intermittent use of chloramine disinfectant are discussed. The research also addresses methods for identifying microbially induced corrosion issues and methods to optimize operations through the use of monitoring and modeling activities. Disinfectant residual criteria for reclaimed water systems are presented to assist system operators.
Author : Anonim
Publisher : Unknown
Page : 884 pages
File Size : 42,6 Mb
Release : 1991
Category : Hydrology
ISBN : UOM:39015022363488
Author : Linda Wojcicka
Publisher : Library and Archives Canada = Bibliothèque et Archives Canada
Page : 136 pages
File Size : 52,7 Mb
Release : 2004
Category : Electronic
ISBN : 0612952584
Microbial quality may degrade in drinking water distribution systems despite maintaining a disinfectant residual. This study attempted to explain the survival of microorganisms in disinfected environments. Two major hypotheses were tested. First, organisms isolated from disinfected environments were studied to determine if they were inherently more resistant to further disinfection, compared to organisms which have never come into contact with disinfectants. It was found that antecedent growth conditions were more important for resistance to disinfectants than the environmental origin. Second, the impact of particulate matter on disinfection was investigated. It was hypothesized that particulate matter protected microorganisms from disinfection, and it was expected that enmeshment of organisms within particles would protect microorganisms from not only chemical, but also physical disinfectants. No conclusive evidence was found to suggest the particles used in these experiments had a significant impact on inactivation kinetics.
Author : Simon Olov Rutledge
Publisher : National Library of Canada = Bibliothèque nationale du Canada
Page : 654 pages
File Size : 49,8 Mb
Release : 2003
Category : Electronic
ISBN : 0612891542
Author : Cécile Marcil
Publisher : Nova Science Publishers
Page : 124 pages
File Size : 45,7 Mb
Release : 2020-07-13
Category : Drinking water
ISBN : 153618070X
"Drinking Water: Quality Control, Distribution Systems and Treatment focuses on some of the technologies involved in water treatment processes, such as adsorption, co-precipitation, flocculation, and coagulation. The authors emphasize the newest easy processes, inadequacies, and prospects of drinking water treatment. In one study, a simple effective intervention for biochanin A in influent water using ZSM-5, a nano-porous crystalline zeolite, is described. In closing, a Sphingomonas paucimobilis strain isolated from an Indian drinking water system was evaluated for its ability to co-aggregate and form mixed biofilms with Salmonella typhimurium, Shigella flexneri, and Escherichia coli O57:H7"
Author : Anonim
Publisher : Unknown
Page : 1194 pages
File Size : 45,7 Mb
Release : 1991
Category : Water
ISBN : MINN:31951P00125834M
Author : United States. Environmental Protection Agency
Publisher : Unknown
Page : 506 pages
File Size : 49,6 Mb
Release : 1994
Category : Environmental protection
ISBN : UOM:39015030249133
Author : Anonim
Publisher : Unknown
Page : 810 pages
File Size : 53,7 Mb
Release : 2009
Category : Dissertations, Academic
ISBN : STANFORD:36105132702585
Author : Anonim
Publisher : Unknown
Page : 1120 pages
File Size : 45,8 Mb
Release : 1990
Category : Agriculture
ISBN : UIUC:30112102098123
