Water Softening and Treatment


Book Description




Calcium and Magnesium in Drinking-water


Book Description

Can calcium and magnesium ("hardness") in drinking water contribute to preventing disease? This book documents the outputs of an unprecedented group of experts assembled by the World Health Organization to address this question. It includes their comprehensive consensus view on what is known and what is not about the role and possible health benefit of calcium and magnesium in drinking-water. Also included is a series of chapters each authored by internationally renowned experts reviewing the state of the art in different aspects including: global dietary calcium and magnesium intakes; the contribution of drinking water to calcium and magnesium intake; health significance of calcium and magnesium; role of drinking-water in relation to bone metabolism; epidemiological studies and the association of cardiovascular disease risks with water hardness and magnesium in particular; water production; technical issues and economics. In both developed and developing countries, typical diets are often deficient in calcium and magnesium--essential minerals which are necessary for the development of strong bones and teeth, and for cardiovascular function. At the same time, there is evidence that consuming "hard" drinking-water may be associated with reduced risks for some diseases. Climate change and other ongoing changes will increase the use of high tech treatments--for example desalination and reclamation of polluted waters and mean that the issue will be of increasing future importance.




Water Quality & Treatment: A Handbook on Drinking Water


Book Description

The definitive water quality and treatment resource--fully revised and updated Comprehensive, current, and written by leading experts, Water Quality & Treatment: A Handbook on Drinking Water, Sixth Edition covers state-of-the-art technologies and methods for water treatment and quality control. Significant revisions and new material in this edition reflect the latest advances and critical topics in water supply and treatment. Presented by the American Water Works Association, this is the leading source of authoritative information on drinking water quality and treatment. NEW CHAPTERS ON: Chemical principles, source water composition, and watershed protection Natural treatment systems Water reuse for drinking water augmentation Ultraviolet light processes Formation and control of disinfection by-products DETAILED COVERAGE OF: Drinking water standards, regulations, goals, and health effects Hydraulic characteristics of water treatment reactors Gas-liquid processes and chemical oxidation Coagulation, flocculation, sedimentation, and flotation Granular media and membrane filtration Ion exchange and adsorption of inorganic contaminants Precipitation, coprecipitation, and precipitative softening Adsorption of organic compounds by activated carbon Chemical disinfection Internal corrosion and deposition control Microbiological quality control in distribution systems Water treatment plant residuals management




Drinking Water Treatment


Book Description

This publication provides the scientific fundamentals for understanding chemical, physical and biological processes that are used in drinking water treatment, such as filtration, coagulation, softening, deironing, demanganization and others. Written in a compact and easily accessible form, the book is focused on the objectives, the theoretical basics and the practical implementation of the treatment processes.




Produced Water Treatment Field Manual


Book Description

Of Filter Types P.148




Theory and Practice of Water and Wastewater Treatment


Book Description

Provides an excellent balance between theory and applications in the ever-evolving field of water and wastewater treatment Completely updated and expanded, this is the most current and comprehensive textbook available for the areas of water and wastewater treatment, covering the broad spectrum of technologies used in practice today—ranging from commonly used standards to the latest state of the art innovations. The book begins with the fundamentals—applied water chemistry and applied microbiology—and then goes on to cover physical, chemical, and biological unit processes. Both theory and design concepts are developed systematically, combined in a unified way, and are fully supported by comprehensive, illustrative examples. Theory and Practice of Water and Wastewater Treatment, 2nd Edition: Addresses physical/chemical treatment, as well as biological treatment, of water and wastewater Includes a discussion of new technologies, such as membrane processes for water and wastewater treatment, fixed-film biotreatment, and advanced oxidation Provides detailed coverage of the fundamentals: basic applied water chemistry and applied microbiology Fully updates chapters on analysis and constituents in water; microbiology; and disinfection Develops theory and design concepts methodically and combines them in a cohesive manner Includes a new chapter on life cycle analysis (LCA) Theory and Practice of Water and Wastewater Treatment, 2nd Edition is an important text for undergraduate and graduate level courses in water and/or wastewater treatment in Civil, Environmental, and Chemical Engineering.




Physical-Chemical Treatment of Water and Wastewater


Book Description

The books currently available on this subject contain some elements of physical-chemical treatment of water and wastewater but fall short of giving comprehensive and authoritative coverage. They contain some equations that are not substantiated, offering empirical data based on assumptions that are therefore difficult to comprehend. This text brings together the information previously scattered in several books and adds the knowledge from the author's lectures on wastewater engineering. Physical-Chemical Treatment of Water and Wastewater is not only descriptive but is also analytical in nature. The work covers the physical unit operations and unit processes utilized in the treatment of water and wastewater. Its organization is designed to match the major processes and its approach is mathematical. The authors stress the description and derivation of processes and process parameters in mathematical terms, which can then be generalized into diverse empirical situations. Each chapter includes design equations, definitions of symbols, a glossary of terms, and worked examples. One author is an environmental engineer and a professor for over 12 years and the other has been in the practice of environmental engineering for more than 20 years. They offer a sound analytical mathematical foundation and description of processes. Physical-Chemical Treatment of Water and Wastewater fills a niche as the only dedicated textbook in the area of physical and chemical methods, providing an analytical approach applicable to a range of empirical situations Contents Introduction Characteristics of Water and Wastewater Quantity of Water and Wastewater Constituents of Water and Wastewater Unit Operations of Water and Wastewater Treatment Flow Measurements and Flow and Quality Equalizations Pumping Screening, Settling, and Flotation Mixing and Flocculation Conventional Filtration Advanced Filtration and Carbon Adsorption Aeration, Absorption, and Stripping Unit Processes of Water and Wastewater Treatment Water Softening Water Stabilization Coagulation Removal of Iron and Manganese by Chemical Precipitation Removal of Phosphorus by Chemical Precipitation Removal of Nitrogen by Nitrification-Denitrification Ion Exchange Disinfection




Chemistry of Water Treatment, Second Edition


Book Description

This second edition demonstrates how chemistry influences the design of water treatment plants and how it should influence the design. Historically, water treatment plants have been designed from hydraulic considerations with little regard to chemical aspects. The many chemical reactions used for removal of pollutants from water simply cannot be forced to occur within current designs. This book re-examines this traditional approach in light of today's water quality and treatment. Will current water treatment processes be sufficient to meet future demands or will new processes have to be devised? Chemistry of Water Treatment assesses the chemical and physical efficacies of current processes to meet the demands of the Safe Drinking water Act, providing expert information to persons responsible for the production of potable water into the next century.




Practical Boiler Water Treatment Handbook


Book Description

PARTIAL CONTENTS - PART - I. BOILER BASICS - Chapter 1. Boiler - An Introduction - Chapter 2. Classification of Boilers - Chapter 3. Common Terms and Explanation - PART - II. BOILER WATER TROUBLES - Chapter 4. Impurities in Water and Their Effects - Chapter 5. Boiler Water Troubles - A Prelude - Chapter 6. Scale Formation - Chapter 7. Silica Carryover - Chapter 8. Scale Formation in Economizers - Chapter 9. Super Heater and Turbine Deposits - Chapter 10. Corrosion - Basic Information - Chapter 11. General Corrosion (Overall Corrosion / Acidic Corrosion) - Chapter 12. Dissolved Oxygen Corrosion (Pitting Corrosion) - Chapter 13. Carbondioxide Corrosion - Chapter 14. Corrosion caused by Unstable Salts - Chapter 15. Corrosion caused by Other Substances - Chapter 16. Corrosion caused by Chelants (Chelant Corrosion) - Chapter 17. Caustic Embrittlement and Caustic Gouging - Chapter 18. Hydrogen Embrittlement - Chapter 19. Condensate Corrosion - Chapter 20. Preboiler Corrosion - Chapter 21. Economizer Corrosion - Chapter 22. Super Heater and Turbine Corrosion - Chapter 23. Foaming, Priming & Carryover - PART - III. WATER QUALITY REQUIREMENTS AND TREATMENT PROGRAMS - Chapter 24. Quality Requirements for Feed Water and Boiler Water - Chapter 25. Objectives of Boiler Water Treatment - Chapter 26. External Treatment and Internal Treatment - Chapter 27. Water Treatment programs - Guidelines - PART - IV. EXTERNAL TREATMENT - Chapter 28. External Treatment - A Prelude - Chapter 29. Coagulation (Removal of Color, Turbidity and Suspended Matter) - Chapter 30. Filtration - Chapter 31. Softening by Chemical Method (Lime - Soda Softening) - Chapter 32. Ion Exchange Resins and Treatment Methods - Chapter 33. Softening by Ion-Exchange Method - Chapter 34. Dealkalization - Chapter 35. Demineralization (Deionization) - Chapter 36. Mixed Bed Deionization - Chapter 37. Reverse Osmosis - Chapter 38. Evaporation - Chapter 39. Silica Removal - Chapter 40. Oil Removal - Chapter 41. Condensate Treatment (Condensate Polishing) - Chapter 42. Deaeration (Mechanical Removal of Oxygen) - PART - V. INTERNAL TREATMENT - Chapter 43. Internal Boiler Water Treatment - A Prelude - Chapter 44. Organic Polymers and Their Role as Scale Inhibitors, Dispersants and Sludge Conditioners in Boiler Water Treatment - Chapter 45. Internal Treatment - Chemical Feeding - Chapter 46. Prevention of Scale Formation - Chapter 47. Sludge Conditioning - Chapter 48. Prevention of Corrosion - An Introduction - Chapter 49. Prevention of Corrosion Due to Low pH - Chapter 50. Prevention of Pitting Corrosion Using Oxygen Scavengers (Chemical Removal of Oxygen) - Chapter 51. Prevention of Caustic Embrittlement and Caustic Gouging - Chapter 52. Prevention of Chelant Corrosion - Chapter 53. Prevention of Condensate Corrosion - Chapter 54. Prevention of Pre-Boiler Corrosion - Chapter 55. Prevention of Economizer Corrosion - Chapter 56. Prevention of Foaming, Priming & Carryover - Chapter 57. Prevention of Silica Carryover - Chapter 58. Boiler Blow Down - PART - VI. BOILER WATER TREATMENT - IMPORTANT CALCULATIONS - Chapter 59. Basic Conversion Factors - Chapter 60. Water Softening - Calculations - Chapter 61. Cycles of Concentration, Blowdown, Feed Water and Makeup Water - Calculations - Chapter 62. Determination of Dosage of Chemicals - PART - VII. BOILER START UP, CLEANING, LAY UP AND MAINTENANCE - Chapter 63. Boiler Startup (Pre-operational Cleaning) - Chapter 64. Descaling and Boiler Cleaning - Chapter 65. Boiler LayUp - Chapter 66. Boiler Maintenance - PART - VIII. CHEMICALS HANDLING, SOLUTION PREPARATION AND FEEDERS - Chapter 67. Chemicals Handling and Storage - Chapter 68. Preparation of Solutions and Suspensions - Chapter 69. Chemical Feeders - PART - IX. ANALYSIS OF WATER AND STEAM - See Website for full TOC




Unit Processes in Drinking Water Treatment


Book Description

This text offers information on the theory of major drinking water treatment processes and contains real-life practical examples. It aims to create guidelines for the design of unit processes that operate within an overall framework for water treatment plants.