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Powdered or granular activated carbon adsorption has been widely used in drinking water treatment plants primarily for taste, odor, and synthetic organic contaminant (SOC) removal. However, carbon adsorption has not been widely used for controlling DOM due to the low equilibrium capacities and slow adsorption kinetics. The main reason for these drawbacks is that the majority of commercial activated carbons have been developed primarily to remove small molecular weight hydrophobic SOCs from water. As a result, many commercial carbons do not provide feasible engineering solutions for removing large molecular weight and heterogeneous mixtures of DBP precursors. This research was undertaken to develop a fundamental understanding of tailoring activated carbons for DBP control. The main objectives of this project were to (1) conduct a systematic investigation for developing a fundamental understanding of how activated carbons should be tailored for enhanced removal of dissolved organic matter (DOM) from natural waters; and (2) investigate the effectiveness of some carbon tailoring approaches for disinfection by-products (DBP) formation control at typical drinking water treatment conditions. This project showed that the removal of DBP precursor by GAC adsorption can be significantly improved. GAC adsorption, using modified GACs, can provide another alternative to some water utilities for meeting the Stage 2 requirements of the Disinfectant/Disinfection By-Products Rule.
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
There are many by-products of water disinfection that are still not fully understood and can be potentially harmful. In this volume all the current research in this area is discussed, along with an examination of the role of NOM (natural organic matter) and its relationship to DBP (disinfection by-product) formation and control in drinking water. Understanding the relationship of NOM to DBP may well lead to new techniques for analyzing and treating water and enable reasonable choices to be made for source-water protection, treatment plant process optimization, and distribution system operation to control DBP's. This volume emphasizes the characterization and reactivity of polar natural organic matter. It examines analytical methods which better characterize NOM and determines some of the polar and nonvolatile DBP forms. It presents innovative new methods, sich as capillary electrophoresis for haloacetic aceids and LC/MS for the identification of polar dinking water DBPs.
An Overview of Water and Wastewater; What Filtration Is All About; Chemical Additives that Enhance Filtration; Selecting the Right Filter Media; What Pressure- and Cake-Filtration Are All; Cartridge and Other Filters Worth Mentioning; What Sand Filtration is All About; Sedimentation, Clarification, Flotation, and Membrane Separation Technologies; Ion Exchange and Carbon Adsorption; Water Sterilization Technologies; Treating the Sludge; Glossary; Index.
Hailed on its initial publication as a real-world, practical handbook, the second edition of Handbook of Water and Wastewater Treatment Plant Operations continues to make the same basic point: water and wastewater operators must have a basic skill set that is both wide and deep. They must be generalists, well-rounded in the sciences, cyber operations, math operations, mechanics, technical concepts, and common sense. With coverage that spans the breadth and depth of the field, the handbook explores the latest principles and technologies and provides information necessary to prepare for licensure exams. Expanded from beginning to end, this second edition provides a no-holds-barred look at current management issues and includes the latest security information for protecting public assets. It presents in-depth coverage of management aspects and security needs and a new chapter covering the basics of blueprint reading. The chapter on water and wastewater mathematics has tripled in size and now contains an additional 200 problems and 350 math system operational problems with solutions. The manual examines numerous real-world operating scenarios, such as the intake of raw sewage and the treatment of water via residual management, and each scenario includes a comprehensive problem-solving practice set. The text follows a non-traditional paradigm based on real-world experience and proven parameters. Clearly written and user friendly, this revision of a bestseller builds on the remarkable success of the first edition. This book is a thorough compilation of water science, treatment information, process control procedures, problem-solving techniques, safety and health information, and administrative and technological trends.
Develops and evaluates artificial neural network (ANN) models for clarified water turbidity and total organic carbon. Determines which factors are most important in optimizing enhanced coagulation. Also develops protocols for source data analysis, model architecture selection, model training, and model evaluation. Studies the use of ANN models in process control.
Refractory organic substances (ROS) are an essential part of the biogeochemical carbon cycle. Wherever there is life on earth, there will also be ROS in the form of poorly biodegradable leftovers of organisms and as a source for new life. Furthermore, it is now beyond doubt that ROS are closely related to the carbon intensity identified as one of the driving forces in the dynamics of green house gas emission, such that ROS play a key role in sustainable development. 'Refractory Organic Substances in the Environment' provides the results of six years of top-priority research, funded by the Deutsche Forschungsgemeinschaft (DFG). This research program investigated the structure and function of ROS in different parts of the environment, from a chemical, physical, biological, and soil scientific point of view. It included the first systematic study of a set of reference samples from Central Europe, originating from a bog lake, soil seepage water, groundwater, and from the wastewaters of a brown coal processing plant and a secondary effluent. Thus, this work not only highlights the structural features obtained from the application of advanced analytical tools, but also the function in anthropogenically influenced aquatic systems and soils. Of special interest to students and researchers in life sciences.
The Drinking Water Act Amendments of 1996 instituted wide-ranging regulatory changes to the seminal Safe Drinking Water Act (SDWA)-such as providing funding to communities facing health risks, focusing regulatory efforts on contaminants posing such health risks, and adding flexibility to the regulatory process- and the amendments continue to shape regulations and regulatory policy to this day. Editor Frederick Pontius's Drinking Water Regulation and Health provides a comprehensive, up-to-date resource on the current regulatory landscape. Drinking Water Regulation and Health serves as a guide for water utilities, regulators, and consultants, forecasting future trends and explaining the latest developments in regulations. A diverse group of contributors covers topics such as water treatment, water protection, how some of the regulations have been interpreted in the courts, how water utilities can stay in compliance, and how to satisfy customer expectations, especially sensitive subpopulations. Divided into four sections - The SDWA and Public Health, Regulation Development, Contaminant Regulation and Treatment, and Compliance Challenges - the book includes chapters on: * Improving Waterborne Disease Surveillance * Application of Risk Assessments in Crafting Drinking Water Regulations * Control of Drinking Water Pathogens and Disinfection By-Products * Selection of Treatment Technology for SDWA Compliance * Death of the Silent Service: Meeting Consumer Expectations * Achieving Sustainable Water Systems * What Water Suppliers Need to Know About Toxic Tort Litigation