Download or read book The Influence of Disinfection Processes on Heterotrophic Bacterial Growth in Distribution Systems written by JiYoung Lee and published by . This book was released on 1997 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impact of Distribution System Water Quality on Disinfection Efficacy written by Hé́lène Baribeau and published by American Water Works Association. This book was released on 2005 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Impact of Ultraviolet Disinfection on Biofilm Growth in a Model Distribution System written by Nicole Lea Celine Giese and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 2002 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbial Quality of Water Supply in Distribution Systems written by Edwin E. Geldreich and published by CRC Press. This book was released on 2020-07-26 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Control of Biofilm Growth in Drinking Water Distribution Systems written by DIANE Publishing Company and published by DIANE Publishing. This book was released on 1994-05 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Factors Limiting Microbial Growth in Distribution Systems written by Mark W. LeChevallier and published by American Water Works Association. This book was released on 1996 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heterotrophic Plate Counts and Drinking water Safety written by Bartram J. and published by World Health Organization. This book was released on 2003-11-06 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Managing Bacterial Regrowth and Presence in Drinking Water Distribution Systems written by Soumya Srinivasan and published by . This book was released on 2008 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Influence of Chemical Disinfection Ultraviolet Irradiation and Pipe Matrix on Biofilm Composition in Drinking Water Distribution Systems written by Fernando M. G. Matias and published by . This book was released on 2007 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drinking Water Distribution Systems written by National Research Council and published by National Academies Press. This book was released on 2007-01-22 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Influence of Distribution System Infrastructure on Bacterial Regrowth written by Jonathan Clement and published by IWA Publishing. This book was released on 2004-01-01 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study has shown that higher levels of carbon supported greater biofilm growth and planktonic populations on the materials that were tested, although the effect was most pronounced on iron pipe. Utilities with significant amounts of iron pipe in their distribution systems may be faced with the greatest regrowth potential. For utilities that also distribute water that is high in natural carbon, this problem may be compounded. Therefore, reducing the organic carbon in the finished water may be effective for any utility wishing to reduce regrowth problems in their distribution system. Other alternatives for utilities wishing to reduce biofilms in the distribution system can include any or all of the following: replacing or relining iron pipe in the system, increasing disinfectant, and implementing effective corrosion control. Originally published by AwwaRF for its subscribers in 2003
Download or read book The Impact of Disinfection Processes on Biofilm Formation in Potable Water Distribution Systems written by M. N. B. Momba and published by . This book was released on 1997 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbial Growth in Drinking Water Supplies written by Dick van der Kooij and published by IWA Publishing. This book was released on 2013-09-14 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Factors Limiting Microbial Growth in Distribution Systems written by Anne K. Camper and published by . This book was released on 1996 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Data Collection to Support a Simplified Bacterial Regrowth Model for Distribution Systems written by and published by . This book was released on 2001 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management of Legionella in Water Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-02-20 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Prevention and Monitoring of Biofilm Formation in Drinking Water Distribution Systems written by Fahimeh Bimakr and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: [Truncated] Biofilm formation in drinking water distribution systems (DWDSs) causes detrimental impacts on water quality and infrastructure. Biofilms can also act as a reservoir for pathogens, and are thus of public health concern. To discourage biofilm growth in DWDSs, antimicrobial agents (disinfectants) including chlorine, chloramines and ozone are used. However, these chemicals produce harmful disinfection by-products, many of which are toxic and carcinogenic, and hence their formation should be minimised. The challenge to maintain appropriate disinfection and to avoid unwanted effects of biofilm formation in DWDSs requires the development of new technologies for efficient disinfection and microbial control. Biofilm formation is affected by the type of pipe wall material, especially its surface characteristics, including roughness, surface energy and biological affinity. Pipe materials may also release substances that enhance or inhibit biofilm formation, and so influence the presence and persistence of microbial pathogens. A number of nanomaterials having antimicrobial properties have been proposed for use in water treatment. Moreover, microstructured surfaces and other surface coatings have also been reported to inhibit biofilm formation. In this study a number of polymers of different hydrophobicity including high density polyethylene (HDPE), polytetrafluoroethylene (PTFE) and nylon, with and without embedded copper, as well as a nanomaterial (carbon nanotubes) and marine paint (Hempel X3) were tested for their effects on biofilm formation in a laboratory scale pipe rig containing water from a water supply reservoir (Mundaring Weir, Perth, Western Australia), and compared with the traditional pipe materials stainless steel and concrete. Microbial growth on the tested materials was measured by counting DAPI-stained cells using epifluorscence microscopy, flow cytometry, heterotrophic plate agar, and an ATP assay for measuring cellular activity. Biofouling on all tested materials was detected using all four methods (ATP assay, epifluorescence microscopy, flow cytometry and colony counting) as rapidly as 1 h following installation of the material into the laboratory pipe rig. The results showed that none of the tested materials or coatings showed superior performance in preventing biofilm formation relative to stainless steel or concrete.
