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Investigation Of Factors Affecting Chloramine Stability In The City Of Arlingtons Water Distribution System
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Book Synopsis Investigation of Factors Affecting Chloramine Stability in the City of Arlington's Water Distribution System by : Srinivas Prabakar
Download or read book Investigation of Factors Affecting Chloramine Stability in the City of Arlington's Water Distribution System written by Srinivas Prabakar and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research four studies were conducted to investigate monochloramine stability in a water distribution system. The primary objective of the COA distribution study was to investigate and identify factors causing chloramine decay using data collected from the distribution system several times during the year and to generate a mathematical model of the decay. Sampling was done 3 times in the year 2009 and 2 times in the year 2010. Sampling data was analyzed by multiple regression analysis. Based on a multiple regression analysis, only pressure plane, total chlorine, and interactions of these two factors were significant in explaining total chlorine decay. The impact of pressure plane can be explained by the differences in the raw water. It was not possible to measure monochloramine decay but since monochloramine and total chlorine are significantly correlated it is likely that analysis of monochloramine decay would yield similar results. In the second study, the standard method for assimilable organic carbon (AOC) determination was compared to different methods; differential DOC by 20 days, 3 days, flow cytometry method using natural microbial consortium and by using pure culture. For 36 different samples, AOC values were found to be significantly different using the standard method and the proposed modified standard method using flow cytometry but they were well correlated (R2=0.96). AOC values by flow cytometry were on average 17.6% higher than those measured by the standard method. Flow cytometer enumeration reduces the time needed to perform the enumeration from 5 days to 1 hr which reduces the overall time required for the determination from 14 days to 9 days. Also, flow cytometer enumeration gives the flexibility to store the samples for the efficient use of the flow cytometer. The third study investigated the impact of pre-ozonation, intermediate ozonation, coagulation-floculation-sedimentation, biofiltration and chloramination on AOC concentration. From this study it is found that the pre-ozonation and intermediate ozonation increased the AOC concentrations. Pre-ozonation increased AOC concentration higher than intermediate ozonation and chloramination. The coagulation flocculation, and sedimentation processes and the biofiltration process reduced the AOC concentration from pre-ozonation and intermediate ozonation. Surprisingly, coagulation, flocculation, and sedimentation reduced AOC more than bio-filtration. In the fourth study the monochloramine decay rate was studied as a function of temperature, initial concentration of biofilm, pH and AOC, each at two levels in the treated drinking water. Linear regression and ANOVA analysis were used for the investigation. From linear regression monochloramine decay and total chlorine decay were found to better fit a second order rate than zero or first order for the majority of treatments. The coefficient of determination, R2, for the monochloramine decay data from sixteen treatments fit with a second order reaction varied between 0.84 and 0.99. From ANOVA analysis it is found that presence of biofilm increased the monochloramine decay. Increased AOC increased the monochloramine decay in the longer water age while temperature and pH were not found to be significant factors. Total chlorine decay results were similar to monochloramine decay.
Book Synopsis Long-Term Effects of Disinfection Changes on Water Quality by : John E. Dyksen
Download or read book Long-Term Effects of Disinfection Changes on Water Quality written by John E. Dyksen and published by American Water Works Association. This book was released on 2007 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book EPA 815-R. written by and published by . This book was released on 1999 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Standard Methods for the Examination of Water and Wastewater by : American Public Health Association
Download or read book Standard Methods for the Examination of Water and Wastewater written by American Public Health Association and published by . This book was released on 1981 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :U.S. National Academy of Sciences Publisher :National Academies Press ISBN 13 :030906421X Total Pages :243 pages Book Rating :4.3/5 (9 download)
Book Synopsis Water for the Future by : U.S. National Academy of Sciences
Download or read book Water for the Future written by U.S. National Academy of Sciences and published by National Academies Press. This book was released on 1999-03-09 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the result of a joint research effort led by the U.S. National Academy of Sciences and involving the Royal Scientific Society of Jordan, the Israel Academy of Sciences and Humanities, and the Palestine Health Council. It discusses opportunities for enhancement of water supplies and avoidance of overexploitation of water resources in the Middle East. Based on the concept that ecosystem goods and services are essential to maintaining water quality and quantity, the book emphasizes conservation, improved use of current technologies, and water management approaches that are compatible with environmental quality.
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technologies for Upgrading Existing Or Designing New Drinking Water Treatment Facilities by :
Download or read book Technologies for Upgrading Existing Or Designing New Drinking Water Treatment Facilities written by and published by . This book was released on 1990 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of urban development on stream ecosystems in nine metropolitan study areas across the United States by : James F. Coles
Download or read book Effects of urban development on stream ecosystems in nine metropolitan study areas across the United States written by James F. Coles and published by . This book was released on 2012 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :U.S. Global Change Research Program Publisher :Cambridge University Press ISBN 13 :0521144078 Total Pages :193 pages Book Rating :4.5/5 (211 download)
Book Synopsis Global Climate Change Impacts in the United States by : U.S. Global Change Research Program
Download or read book Global Climate Change Impacts in the United States written by U.S. Global Change Research Program and published by Cambridge University Press. This book was released on 2009-08-24 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes the science of climate change and impacts on the United States, for the public and policymakers.
Book Synopsis Toxicological Profile for Chlorine Dioxide and Chlorite by :
Download or read book Toxicological Profile for Chlorine Dioxide and Chlorite written by and published by . This book was released on 2004 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Watershed Management for Potable Water Supply by : National Research Council
Download or read book Watershed Management for Potable Water Supply written by National Research Council and published by National Academies Press. This book was released on 2000-02-17 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1997, New York City adopted a mammoth watershed agreement to protect its drinking water and avoid filtration of its large upstate surface water supply. Shortly thereafter, the NRC began an analysis of the agreement's scientific validity. The resulting book finds New York City's watershed agreement to be a good template for proactive watershed management that, if properly implemented, will maintain high water quality. However, it cautions that the agreement is not a guarantee of permanent filtration avoidance because of changing regulations, uncertainties regarding pollution sources, advances in treatment technologies, and natural variations in watershed conditions. The book recommends that New York City place its highest priority on pathogenic microorganisms in the watershed and direct its resources toward improving methods for detecting pathogens, understanding pathogen transport and fate, and demonstrating that best management practices will remove pathogens. Other recommendations, which are broadly applicable to surface water supplies across the country, target buffer zones, stormwater management, water quality monitoring, and effluent trading.
Book Synopsis Principles of Environmental Engineering by : Yan LIU
Download or read book Principles of Environmental Engineering written by Yan LIU and published by Springer. This book was released on 2022-05-22 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook contains the contents coming from hydraulics, hydrodynamics, chemical principles, chemical reaction engineering and bioengineering, which relates closely with fundamental principles in environmental engineering. It mainly covers principles including basic concepts, theories, methods and related equipment in fluid flow and transportation, heat transfer, absorption, chemical and biological reaction kinetics and reactors, as well as their applications in environmental engineering. At same time, the readers learns the basic viewpoints and methods commonly used in engineering technology, such as balance method, reasonable simplification, dimensional analysis method, boundary layer theory, optimization and mathematical model method. It broadens the student’s understanding in solving those problems in environmental engineering, and enhances their awareness of industrialization. This book is the specialized foundation and principles for learning the professional courses of environmental engineering, such as "water pollution control," "air pollution control," "solid waste treatment and disposal" and "ecological restoration engineering", while avoiding the repetition of the contents of those professional books.
Book Synopsis Privatization of Water Services in the United States by : National Research Council
Download or read book Privatization of Water Services in the United States written by National Research Council and published by National Academies Press. This book was released on 2002-08-20 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the quest to reduce costs and improve the efficiency of water and wastewater services, many communities in the United States are exploring the potential advantages of privatization of those services. Unlike other utility services, local governments have generally assumed responsibility for providing water services. Privatization of such services can include the outright sale of system assets, or various forms of public-private partnershipsâ€"from the simple provision of supplies and services, to private design construction and operation of treatment plants and distribution systems. Many factors are contributing to the growing interest in the privatization of water services. Higher operating costs, more stringent federal water quality and waste effluent standards, greater customer demands for quality and reliability, and an aging water delivery and wastewater collection and treatment infrastructure are all challenging municipalities that may be short of funds or technical capabilities. For municipalities with limited capacities to meet these challenges, privatization can be a viable alternative. Privatization of Water Services evaluates the fiscal and policy implications of privatization, scenarios in which privatization works best, and the efficiencies that may be gained by contracting with private water utilities.
Book Synopsis Optimizing Water Treatment Plant Performance Using the Composite Correction Program by :
Download or read book Optimizing Water Treatment Plant Performance Using the Composite Correction Program written by and published by . This book was released on 1998 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heterotrophic Plate Counts and Drinking-water Safety by : Bartram J.
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
Book Synopsis Drinking Water from Forests and Grasslands by :
Download or read book Drinking Water from Forests and Grasslands written by and published by . This book was released on 2000 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
