Download or read book Management of DBP Formation Using Enhanced Treatment Technologies and an Array of Prediction Tools written by Sandhya Rao Poleneni and published by . This book was released on 2017 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disinfection is a vital part of a drinking water treatment process and chlorine is the most widely used disinfectant in the world. Though known for its effectiveness, usage of chlorine does lead to the formation of carcinogens which are commonly called Disinfection By-Products (DBPs).With the introduction of the StageII Disinfectant and Disinfection By-Product (D/DBP) regulations, water utility systems must be increasingly cognizant of water quality as it progresses through the supply system and ultimately reaches customers. This study is performed in an effort to develop a simple, non-invasive and cost-effective technology that will effectively lower organic precursors by having water utilities reuse their treatment residuals. Jar tests are used to simulate drinking water treatment processes with coagulants - Aluminum Sulfate (Alum), PolyAluminum Chloride (PACl) and Ferric Chloride and their residuals. Ten Coagulant-to-Residual (C/R) ratios are tested with water from the Missouri River and alluvial ground waters. This treatment results in heavier floc formation and leads to improved sedimentation of organics and additional removal of Aluminum and Iron. An average of 21[percent], 28[percent] and 33[percent] additional TOC removal can be achieved with C/R ratios [less than] 1 with Alum, PACl and Ferric chloride respectively. This study will also focus on determining whether the addition of residual affects chlorine demand, chlorine residual, decay rates, and DBP formation. To simulate the DBP formation and chlorine decay kinetics in small-scale distribution systems, water treated with various coagulants and coagulant to residual ratios was tested in a jar-type simulated distribution system. The TTHM formation over time is at least 35[percent] higher on day 0, 39[percent] higher on day 1 and 47[percent] higher on day 3 in all systems when treated only with coagulants versus when treated with residuals at best C/R ratios irrespective of what coagulant used. It can also be seen that higher (at least 42[percent]) residual concentration can be maintained on day 3 in all water systems when treated with residuals at best C/R ratios versus when treated with only coagulants. Increase in turbidity doesn’t always result in increase in TOC when treated with coagulants and vice versa when treated with residuals at best C/R ratios. TOC, TTHM and chlorine residual follow the pattern of increasing and decreasing with each other and with type of treatment (C/R ratios and coagulants) while turbidity doesn’t irrespective of the coagulant used. Compliance also requires a better understanding of reaction kinetics changes and wall effects with different materials used in the distribution system.To validate our results in full scale distribution system physical conditions, effect of different materials, wall effects, bulk reactions and water movement is analyzed using Simulated Distribution System (SDS) tests, Material Specific Simulated Distribution System (MS-SDS) tests Pipe Loop and Pipe Section Reactor (PSR); all built using materials from City of Columbia distribution system.On an average, just the choice of pipe materials such as PVC and Iron can account for as much as 36 [percent] difference in TTHM formation and 60[percent] difference in chlorine residual decay over time irrespective of the prediction model and operational strategy used.In case of Iron, PE is [less than] 1, leading us to conclude that in the iron pipe systems there is a net loss of TTHM yield due to non-TTHM forming chlorine demand imposed by the pipe environment, whereas in PVC pipe, PE is [greater than] 1.
Download or read book Disinfection By products in Drinking Water written by M.N.V. Prasad and published by Butterworth-Heinemann. This book was released on 2020-02-18 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disinfection Byproducts in Drinking Water: Detection and Treatment presents cutting-edge research on how to understand the procedures, processes and considerations for detecting and treating disinfection by-products from drinking water, swimming pool water, and wastewater. The book begins with an overview of the different groups of Disinfection Byproducts (DBPs), such as: Trihalomethanes (THM), Halo acetic acids, and Haloacetonitrile (HAN). This coverage is quickly followed by a clear and rigorous exposition of the latest methods and technologies for the characterization, occurrence, formation, transformation and removal of DBPs in drinking water. Other chapters focus on ultraviolet-visible spectroscopy, electron spin resonance, and gas chromatography-mass spectrometry. Researchers will find a valuable resource to a breath of topics for DBP detection and treatment, including various recent techniques, such as microfiltration, nanofiltration membrane and nanotechnology. - Explains the latest research in detection, treatment processes and remediation technologies - Includes sampling, analytical and characterization methods and approaches - Covers cutting-edge research, including membrane based technologies, nanotechnology treatment technologies and bioremediation treatment technologies - Provides background information regarding contamination sources
Download or read book Controlling Disinfection By products and Microbial Contaminants in Drinking Water written by Robert M. Clark and published by DIANE Publishing. This book was released on 2001 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Environmental Health written by and published by Newnes. This book was released on 2008-09-01 with total page 5036 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental health has evolved over time into a complex, multidisciplinary field. Many of the key determinants and solutions to environmental health problems lie outside the direct realm of health and are strongly dependent on environmental changes, water and sanitation, industrial development, education, employment, trade, tourism, agriculture, urbanization, energy, housing and national security. Environmental risks, vulnerability and variability manifest themselves in different ways and at different time scales. While there are shared global and transnational problems, each community, country or region faces its own unique environmental health problems, the solution of which depends on circumstances surrounding the resources, customs, institutions, values and environmental vulnerability. This work contains critical reviews and assessments of environmental health practices and research that have worked in places and thus can guide programs and economic development in other countries or regions. The Encyclopedia of Environmental Health, Five Volume Set seeks to conceptualize the subject more clearly, to describe the best available scientific methods that can be used in characterizing and managing environmental health risks, to extend the field of environmental health through new theoretical perspectives and heightened appreciation of social, economic and political contexts, and to encourage a richer analysis in the field through examples of diverse experiences in dealing with the health-environment interface. The Encyclopedia of Environmental Health contains numerous examples of policy options and environmental health practices that have worked and thus can guide programs in other countries or regions It includes a wide range of tools and strategies that can assist communities and countries in assessing environmental health conditions, monitoring progress of intervention implementation and evaluating outcomes Provides a comprehensive overview of existing knowledge in this emerging field Articles contain summaries and assessments of environmental health practices and research, providing a framework for further research Places environmental health in the broader context of environmental change and related ecological, political, economic, social, and cultural issues
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review of the New York City Watershed Protection Program written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-12-04 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: New York City's municipal water supply system provides about 1 billion gallons of drinking water a day to over 8.5 million people in New York City and about 1 million people living in nearby Westchester, Putnam, Ulster, and Orange counties. The combined water supply system includes 19 reservoirs and three controlled lakes with a total storage capacity of approximately 580 billion gallons. The city's Watershed Protection Program is intended to maintain and enhance the high quality of these surface water sources. Review of the New York City Watershed Protection Program assesses the efficacy and future of New York City's watershed management activities. The report identifies program areas that may require future change or action, including continued efforts to address turbidity and responding to changes in reservoir water quality as a result of climate change.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Oxidation Processes for Water and Wastewater Treatment written by Simon Parsons and published by IWA Publishing. This book was released on 2004-03-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The suitability of Advanced Oxidation Processes (AOPs) for pollutant degradation was recognised in the early 1970s and much research and development work has been undertaken to commercialise some of these processes. AOPs have shown great potential in treating pollutants at both low and high concentrations and have found applications as diverse as ground water treatment, municipal wastewater sludge destruction and VOCs control. Advanced Oxidation Processes for Water and Wastewater Treatment is an overview of the advanced oxidation processes currently used or proposed for the remediation of water, wastewater, odours and sludge. The book contains two opening chapters which present introductions to advanced oxidation processes and a background to UV photolysis, seven chapters focusing on individual advanced oxidation processes and, finally, three chapters concentrating on selected applications of advanced oxidation processes. Advanced Oxidation Processes for Water and Wastewater Treatment will be invaluable to readers interested in water and wastewater treatment processes, including professionals and suppliers, as well as students and academics studying in this area. Dr Simon Parsons is a Senior Lecturer in Water Sciences at Cranfield University with ten years' experience of industrial and academic research and development.
Download or read book Natural Organic Matter in Water written by Mika Sillanpää and published by Butterworth-Heinemann. This book was released on 2014-10-07 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately 77 percent of the freshwater used in the United States comes from surface-water sources and is subject to natural organic matter contamination according to the United States Geological Survey. This presents a distinct challenge to water treatment engineers. An essential resource to the latest breakthroughs in the characterization, treatment and removal of natural organic matter (NOM) from drinking water, Natural Organic Matter in Waters: Characterization and Treatment Methods focuses on advance filtration and treatment options, and processes for reducing disinfection byproducts. Based on the author's years of research and field experience, this book begins with the characterization of NOM including: general parameters, isolation and concentration, fractionation, composition and structural analysis and biological testing. This is followed by removal methods such as inorganic coagulants, polyelectrolytes and composite coagulants. Electrochemical and membranes removal methods such as: electrocoagulation, electrochemical oxidation, microfiltration and ultrafiltration, nanofiltration and membrane fouling. - Covers conventional as well as advanced NOM removal methods - Includes characterization methods of NOM - Explains removal methods such as: removal by coagulation, electrochemical, advanced oxidation, and integrated methods
Download or read book Personalized Medicine in Oncology written by Ari VanderWalde and published by . This book was released on 2022 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowhere is the explosion in comprehensive genomic testing more evident than in oncology. Multiple consensus guidelines now recommend molecular testing as the standard of care for most metastatic tumors. To aid in the advancement of this rapidly changing field, we intend this Special Issue of JPM to focus on technical developments in the genomic profiling of cancer, detail promising somatic alterations that either are, or have a high likelihood of being, relevant in the near future, and to address issues related to the pricing and value of these tests.The last few years have seen the cost of molecular testing decrease by orders of magnitude. In 2018, we saw the first “site-agnostic” drug approvals in cancer (for microsatellite unstable cancer (PD-1 inhibitors) and NTRK-fusions (TRK inhibitors)). Research on targetable mutations, determination of genetic “signatures” that can use multiple individual genes/pathways, development of targeted therapy, and insight into the value of new technology remains at the cutting edge of research in this field. We are soliciting papers that present new technologies to assess predictive biomarkers in cancer, original research (pre-clinical or clinical) that demonstrates promise for particular targeted therapies in cancer, and articles that explore the clinical and financial impacts of this paradigmatic shift in cancer diagnostics and treatment.
Download or read book Alternatives for Managing the Nation s Complex Contaminated Groundwater Sites written by National Research Council and published by National Academies Press. This book was released on 2013-02-27 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Across the United States, thousands of hazardous waste sites are contaminated with chemicals that prevent the underlying groundwater from meeting drinking water standards. These include Superfund sites and other facilities that handle and dispose of hazardous waste, active and inactive dry cleaners, and leaking underground storage tanks; many are at federal facilities such as military installations. While many sites have been closed over the past 30 years through cleanup programs run by the U.S. Department of Defense, the U.S. EPA, and other state and federal agencies, the remaining caseload is much more difficult to address because the nature of the contamination and subsurface conditions make it difficult to achieve drinking water standards in the affected groundwater. Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites estimates that at least 126,000 sites across the U.S. still have contaminated groundwater, and their closure is expected to cost at least $110 billion to $127 billion. About 10 percent of these sites are considered "complex," meaning restoration is unlikely to be achieved in the next 50 to 100 years due to technological limitations. At sites where contaminant concentrations have plateaued at levels above cleanup goals despite active efforts, the report recommends evaluating whether the sites should transition to long-term management, where risks would be monitored and harmful exposures prevented, but at reduced costs.
Download or read book Chemical Water and Wastewater Treatment VIII written by Hermann H. Hahn and published by IWA Publishing. This book was released on 2004-11-01 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the wake of the Millennium Declaration and the Johannesburg resolutions, many countries have begun to address or re-write their policies regarding water supply and wastewater disposal. The goal is to provide high-quality drinking-water for more people and to safely dispose of spent waters from a large portion of the population than today. This book, as its predecessors, provides information and technical solutions to accomplish this mammoth task. It is the outcome of collective experience and know-how exchanged between experts in the field of water technology from all over the world: from the Americas, from central and southern Africa, from Europe and from different parts of Asia. The Chemical Water and Wastewater Treatment Series provides authoritative coverage of the key current developments in the chemical treatment of water and wastewater in theory or practice and related problems such as sludge production and properties, and the reuse of chemicals and chemically-treated waters and sludges. Chemical Water and Wastewater Treatment VIII is a valuable resource for managers, scientists, plant operators and others interested in chemical water and wastewater treatment technology.
Download or read book Drinking Water Treatment written by Bingzhi Dong and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-12-20 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date overview on the membrane technology for the drinking water treatment. The applications of PVDF-TiO2 nanowire hybrid ultrafiltration membrane, nanofiltration membrane, forward osmosis membrane, etc. in water treatment are discussed in detail. With abundant practical examples, the book is an essential reference for scientists, students and engineers in municipal engineering, environmental engineering, chemical engineering, environmental chemistry and material science.
Download or read book Bioanalytical Tools in Water Quality Assessment written by Beate Escher and published by IWA Publishing. This book was released on 2011-12-15 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of Water Quality Set - Buy all four books and save over 30% on buying separately! Bioanalytical Tools in Water Quality Assessment reviews the application of bioanalytical tools to the assessment of water quality including surveillance monitoring. The types of water included range from wastewater to drinking water, including recycled water, as well as treatment processes and advanced water treatment. Bioanalytical Tools in Water Quality Assessment not only demonstrates applications but also fills in the background knowledge in toxicology/ecotoxicology needed to appreciate these applications. Each chapter summarises fundamental material in a targeted way so that information can be applied to better understand the use of bioanalytical tools in water quality assessment. Bioanalytical tools in Water Quality Assessment can be used by lecturers teaching academic and professional courses and also by risk assessors, regulators, experts, consultants, researchers and managers working in the water sector. It can also be a reference manual for environmental engineers, analytical chemists, and toxicologists. Authors: Beate Escher, National Research Centre for Environmental Toxicology (EnTox), The University of Queensland, Australia, Frederic Leusch, Smart Water Research Facility (G51), Griffith University Gold Coast Campus, Australia. With contributions by Heather Chapman and Anita Poulsen
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1990 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book World Environmental and Water Resources Congress 2021 written by Lily A. Baldwin and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the World Environmental and Water Resources Congress 2021, held virtually June 7-11, 2021. Sponsored by the Environmental and Water Resources Institute of ASCE.This collection contains 104 peer-reviewed papers that discuss the latest innovative research, case studies, and best management practices in water resources and the environment with a focus on fresh water sources.Topics include: drinking water; groundwater; wastewater; stormwater; irrigation and drainage infrastructure; waterways; sustainability and smart water; and security and systems analysis.This proceedings will be of interest to engineers and scientists addressing challenges to drinking water and freshwater resources around the world.
