Fate And Persistence Of Pathogens Sunjected To Ultraviolet Light And Chlorine Disinfection

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Fate and Persistence of Pathogens Subjected to Disinfection

Author : Karl G. Linden
Publisher : IWA Publishing
ISBN 13 : 1843396998
Total Pages : 124 pages
Book Rating : 4.8/5 (433 download)

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Book Synopsis Fate and Persistence of Pathogens Subjected to Disinfection by : Karl G. Linden

Download or read book Fate and Persistence of Pathogens Subjected to Disinfection written by Karl G. Linden and published by IWA Publishing. This book was released on 2004-01-01 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disinfection of wastewater is a necessary treatment process for protecting the public from potential exposure to pathogenic microorganisms because many wastewater effluents are discharged into water bodies that may be used for recreation or as future drinking water supplies. Two common forms of disinfection are chlorine and ultraviolet (UV) light. However, microorganisms differ in their susceptibility to UV and chlorine disinfectants. It is necessary to understand how different classes of pathogens respond to UV and chlorine disinfection processes in wastewater to better develop strategies for optimizing the treatment of pathogens in wastewater. It is also recognized that water quality may impact disinfection effectiveness, such as protection of pathogen by particles and disinfectant demand. This study investigated bacteria, viruses and protozoan pathogens. All species of bacteria tested were susceptible to both UV and chlorine, despite differences in antibiotic resistance and tendency to aggregate. Upon exposure to disinfection conditions that could indicate viability of the bacteria tested, but not culturability using common methods, it was found that UV and chlorine were effective in eliminating the capability of viable but non-culturable bacteria to resuscitate and become re-infective. Clostridium spores were resistant to free chlorine and UV disinfection but found to be susceptible to long exposure to monochloramine. Cryptosporidium was resistant to all chlorine forms but very susceptible to UV irradiation. Pathogenic and indicator viruses tested were very susceptible to free chlorine and UV disinfection. UV radiation throughout the 200 to 300 nm range was effective for inactivation of viruses and C. parvum, but wavelengths between 260-270 nm and below 220 nm appeared to be more effective for viruses, suggesting a possible advantage for polychromatic UV sources. Sequential disinfection strategies were proposed and tested to enhance inactivation of various microorganisms. One scenario integrated UV disinfection followed by dynamic chloramination through addition of free chlorine and subsequent transformation to combined chlorine. Further, disinfection of microorganisms in wastewater presents challenges that are inherent to the water matrix, such as pathogens associated with particles. UV and chlorine were both effective for disinfection of coliform in wastewater but chlorine was found to be more effective during long contact times for inactivation of particle associated coliform. In addition to coliform, both Cryptosporidium parvum and Salmonella typhimurium were identified as being particle associated in wastewater using molecular approaches developed to detect microbes in environmental samples

Wastewater Blending

Author : United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment
Publisher :
ISBN 13 :
Total Pages : 260 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Wastewater Blending by : United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment

Download or read book Wastewater Blending written by United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment and published by . This book was released on 2005 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Clean Water Act

Author :
Publisher :
ISBN 13 :
Total Pages : 492 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Clean Water Act by :

Download or read book Clean Water Act written by and published by . This book was released on 2005 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Design of Municipal Wastewater Treatment Plants MOP 8, Fifth Edition

Author : Water Environment Federation
Publisher : McGraw Hill Professional
ISBN 13 : 0071811508
Total Pages : 2990 pages
Book Rating : 4.0/5 (718 download)

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Book Synopsis Design of Municipal Wastewater Treatment Plants MOP 8, Fifth Edition by : Water Environment Federation

Download or read book Design of Municipal Wastewater Treatment Plants MOP 8, Fifth Edition written by Water Environment Federation and published by McGraw Hill Professional. This book was released on 2012-09-01 with total page 2990 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contemporary Municipal Wastewater Treatment Plant Design Methods Fully revised and updated, this three-volume set from the Water Environment Federation and the Environmental and Water Resources Institute of the American Society of Civil Engineers presents the current plant planning, configuration, and design practices of wastewater engineering professionals, augmented by performance information from operating facilities. Design of Municipal Wastewater Treatment Plants, Fifth Edition, includes design approaches that reflect the experience of more than 300 authors and reviewers from around the world. Coverage includes: Integrated facility design Sustainability and energy management Plant hydraulics and pumping Odor control and air emissions Thoroughly updated information on biofilm reactors Biological, physical, and chemical liquid treatment Membrane bioreactors, IFAS, and other integrated biological processes Nutrient removal Sidestream treatment Wastewater disinfection Solids minimization, treatment, and stabilization, including thermal processing Biosolids use and disposal

Waterborne Zoonoses

Author : J. A. Cotruvo
Publisher : IWA Publishing
ISBN 13 : 1843390582
Total Pages : 528 pages
Book Rating : 4.8/5 (433 download)

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Book Synopsis Waterborne Zoonoses by : J. A. Cotruvo

Download or read book Waterborne Zoonoses written by J. A. Cotruvo and published by IWA Publishing. This book was released on 2004-07-31 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zoonoses are caused by microorganisms of animal origin that can also infect humans. Apart from human-to-human transmitted pathogens, they are the microorganisms of greatest concern in regard to threats to drinking-water and ambient water safety, now and in the future. A significant number of emerging and re-emerging waterborne zoonotic pathogens have been recognized over recent decades. SARS, E. coli O157:H7, and Cryptosporidium provide examples of zoonoses with waterborne routes of transmission. Developed from an expert workshop of 29 scientists convened by the World Health Organization and the United States Environmental Protection Agency (USEPA), Waterborne Zoonoses: Identification, Causes and Control provides a critical assessment of current knowledge about waterborne zoonoses and identifies strategies and research needs for controlling future emerging waterborne zoonoses. This book provides guidance to agriculturists, veterinarians, worldwide health agencies and water providers to anticipate potential future waterborne disease problems and to determine whether current practices will be protective or whether new approaches need to be deployed to better protect the health of both humans and animals. Contents Expert Consensus An Introduction To Emerging Waterborne Zoonoses and General Control Principles Water-Related Zoonosis Disease Impacts?Geographical Prevalence Epidemiological Data, Case-Studies, and Outbreaks Categories of Waterborne Disease Organisms Analysis of Zoonotic Microorganisms Prevention and Control of Waterborne Zoonoses Risk Assessment and Regulation Future Emerging Waterborne Zoonoses

Management of Legionella in Water Systems

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309493854
Total Pages : 291 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Management of Legionella in Water Systems by : National Academies of Sciences, Engineering, and Medicine

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.

Water Treatment and Pathogen Control

Author : LeChevallier M.W.
Publisher : World Health Organization
ISBN 13 : 9241562552
Total Pages : 136 pages
Book Rating : 4.2/5 (415 download)

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Book Synopsis Water Treatment and Pathogen Control by : LeChevallier M.W.

Download or read book Water Treatment and Pathogen Control written by LeChevallier M.W. and published by World Health Organization. This book was released on 2004-09-24 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation This publication provides a critical analysis of the literature on removal and inactivation of pathogenic microbes in water to aid the water quality specialist and design engineer in making decisions regarding microbial water quality.

New and Future Developments in Catalysis

Author : Steven L Suib
Publisher : Newnes
ISBN 13 : 0444538739
Total Pages : 493 pages
Book Rating : 4.4/5 (445 download)

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Book Synopsis New and Future Developments in Catalysis by : Steven L Suib

Download or read book New and Future Developments in Catalysis written by Steven L Suib and published by Newnes. This book was released on 2013-07-19 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: New and Future Developments in Catalysis is a package of seven books that compile the latest ideas concerning alternate and renewable energy sources and the role that catalysis plays in converting new renewable feedstock into biofuels and biochemicals. Both homogeneous and heterogeneous catalysts and catalytic processes will be discussed in a unified and comprehensive approach. There will be extensive cross-referencing within all volumes.The use of solar energy during various catalytic chemical processes for the production of an array of chemical products is the theme of this volume. Photocatalysis is a topic of increasing importance due to its essential role in many of today’s environmental and energy source problems. The use of solar energy for catalytic reactions results in a carbon dioxide–neutral process. All photocatalytic processes and the future developments in this area are discussed, including an economic analysis of the various processes. Offers in-depth coverage of all catalytic topics of current interest and outlines future challenges and research areas A clear and visual description of all parameters and conditions, enabling the reader to draw conclusions for a particular case Outlines the catalytic processes applicable to energy generation and design of green processes

Guidance Manual for Compliance with the Filtration and Disinfection Requirements for Public Water Systems Using Surface Water Sources

Download Guidance Manual for Compliance with the Filtration and Disinfection Requirements for Public Water Systems Using Surface Water Sources PDF Online Free

Author : David J. Hiltebrand
Publisher :
ISBN 13 :
Total Pages : 672 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Guidance Manual for Compliance with the Filtration and Disinfection Requirements for Public Water Systems Using Surface Water Sources by : David J. Hiltebrand

Download or read book Guidance Manual for Compliance with the Filtration and Disinfection Requirements for Public Water Systems Using Surface Water Sources written by David J. Hiltebrand and published by . This book was released on 1991 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual suggests design operating and performance criteria for specific surface water quality conditions to provide the optimum protection from microbiological contaminants.

A Plain English Guide to the EPA Part 503 Biosolids Rule

Author :
Publisher :
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis A Plain English Guide to the EPA Part 503 Biosolids Rule by :

Download or read book A Plain English Guide to the EPA Part 503 Biosolids Rule written by and published by . This book was released on 1994 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Controlling Disinfection By-products and Microbial Contaminants in Drinking Water

Author : Robert M. Clark
Publisher : DIANE Publishing
ISBN 13 : 142890073X
Total Pages : 330 pages
Book Rating : 4.4/5 (289 download)

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Book Synopsis Controlling Disinfection By-products and Microbial Contaminants in Drinking Water by : Robert M. Clark

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:

Design Manual

Author :
Publisher :
ISBN 13 :
Total Pages : 268 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Design Manual by :

Download or read book Design Manual written by and published by . This book was released on 1986 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Microbial Growth in Drinking Water Supplies

Author : Dick van der Kooij
Publisher : IWA Publishing
ISBN 13 : 1780400403
Total Pages : 484 pages
Book Rating : 4.7/5 (84 download)

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Book Synopsis Microbial Growth in Drinking Water Supplies by : Dick van der Kooij

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

Quantitative Microbial Risk Assessment

Author : Charles N. Haas
Publisher : John Wiley & Sons
ISBN 13 : 1118910028
Total Pages : 439 pages
Book Rating : 4.1/5 (189 download)

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Book Synopsis Quantitative Microbial Risk Assessment by : Charles N. Haas

Download or read book Quantitative Microbial Risk Assessment written by Charles N. Haas and published by John Wiley & Sons. This book was released on 2014-06-09 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the latest QMRA methodologies to determine infection risk cause by either accidental microbial infections or deliberate infections caused by terrorism • Reviews the latest methodologies to quantify at every step of the microbial exposure pathways, from the first release of a pathogen to the actual human infection • Provides techniques on how to gather information, on how each microorganism moves through the environment, how to determine their survival rates on various media, and how people are exposed to the microorganism • Explains how QMRA can be used as a tool to measure the impact of interventions and identify the best policies and practices to protect public health and safety • Includes new information on genetic methods • Techniques use to develop risk models for drinking water, groundwater, recreational water, food and pathogens in the indoor environment

Microbial Decontamination in the Food Industry

Author : Ali Demirci
Publisher : Elsevier
ISBN 13 : 0857095757
Total Pages : 841 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis Microbial Decontamination in the Food Industry by : Ali Demirci

Download or read book Microbial Decontamination in the Food Industry written by Ali Demirci and published by Elsevier. This book was released on 2012-06-26 with total page 841 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of creating microbiologically-safe food with an acceptable shelf-life and quality for the consumer is a constant challenge for the food industry. Microbial decontamination in the food industry provides a comprehensive guide to the decontamination problems faced by the industry, and the current and emerging methods being used to solve them.Part one deals with various food commodities such as fresh produce, meats, seafood, nuts, juices and dairy products, and provides background on contamination routes and outbreaks as well as proposed processing methods for each commodity. Part two goes on to review current and emerging non-chemical and non-thermal decontamination methods such as high hydrostatic pressure, pulsed electric fields, irradiation, power ultrasound and non-thermal plasma. Thermal methods such as microwave, radio-frequency and infrared heating and food surface pasteurization are also explored in detail. Chemical decontamination methods with ozone, chlorine dioxide, electrolyzed oxidizing water, organic acids and dense phase CO2 are discussed in part three. Finally, part four focuses on current and emerging packaging technologies and post-packaging decontamination.With its distinguished editors and international team of expert contributors, Microbial decontamination in the food industry is an indispensable guide for all food industry professionals involved in the design or use of novel food decontamination techniques, as well as any academics researching or teaching this important subject. Provides a comprehensive guide to the decontamination problems faced by the industry and outlines the current and emerging methods being used to solve them Details backgrounds on contamination routes and outbreaks, as well as proposed processing methods for various commodities including fresh produce, meats, seafood, nuts, juices and dairy products Sections focus on emerging non-chemical and non-thermal decontamination methods, current thermal methods, chemical decontamination methods and current and emerging packaging technologies and post-packaging decontamination

Microbiomes of the Built Environment

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309449839
Total Pages : 318 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Microbiomes of the Built Environment by : National Academies of Sciences, Engineering, and Medicine

Download or read book Microbiomes of the Built Environment written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-10-06 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: People's desire to understand the environments in which they live is a natural one. People spend most of their time in spaces and structures designed, built, and managed by humans, and it is estimated that people in developed countries now spend 90 percent of their lives indoors. As people move from homes to workplaces, traveling in cars and on transit systems, microorganisms are continually with and around them. The human-associated microbes that are shed, along with the human behaviors that affect their transport and removal, make significant contributions to the diversity of the indoor microbiome. The characteristics of "healthy" indoor environments cannot yet be defined, nor do microbial, clinical, and building researchers yet understand how to modify features of indoor environmentsâ€"such as building ventilation systems and the chemistry of building materialsâ€"in ways that would have predictable impacts on microbial communities to promote health and prevent disease. The factors that affect the environments within buildings, the ways in which building characteristics influence the composition and function of indoor microbial communities, and the ways in which these microbial communities relate to human health and well-being are extraordinarily complex and can be explored only as a dynamic, interconnected ecosystem by engaging the fields of microbial biology and ecology, chemistry, building science, and human physiology. This report reviews what is known about the intersection of these disciplines, and how new tools may facilitate advances in understanding the ecosystem of built environments, indoor microbiomes, and effects on human health and well-being. It offers a research agenda to generate the information needed so that stakeholders with an interest in understanding the impacts of built environments will be able to make more informed decisions.

Bad Bug Book

Author : Mark Walderhaug
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781495203619
Total Pages : 292 pages
Book Rating : 4.2/5 (36 download)

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Book Synopsis Bad Bug Book by : Mark Walderhaug

Download or read book Bad Bug Book written by Mark Walderhaug and published by Createspace Independent Publishing Platform. This book was released on 2014-01-14 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bad Bug Book 2nd Edition, released in 2012, provides current information about the major known agents that cause foodborne illness.Each chapter in this book is about a pathogen—a bacterium, virus, or parasite—or a natural toxin that can contaminate food and cause illness. The book contains scientific and technical information about the major pathogens that cause these kinds of illnesses.A separate “consumer box” in each chapter provides non-technical information, in everyday language. The boxes describe plainly what can make you sick and, more important, how to prevent it.The information provided in this handbook is abbreviated and general in nature, and is intended for practical use. It is not intended to be a comprehensive scientific or clinical reference.The Bad Bug Book is published by the Center for Food Safety and Applied Nutrition (CFSAN) of the Food and Drug Administration (FDA), U.S. Department of Health and Human Services.