Sustainable technologies for water supply are urgently needed if water has to be supplied to billions of less fortunate people with inadequate access to water. These technologies must be simple, less expensive, less energy intensive, and easy to maintain for their adaptation among the poor masses.  Four appropriate technologies are discussed here: solar pasteurization, membrane desalination, natural filtration (riverbank filtration), and solar distillation. Solar pasteurization can be a useful means of producing water at remote, but sunny locations where fuel may not be easily available for boiling water. Membrane desalination will remain as a viable means of drinking water production for individual households to large communities. Various membrane filtration techniques as well as the means to "democratize" membrane filtration have been presented. Riverbank filtration is a "natural" filtration technique where drinking water is produced by placing wells on the banks of rivers. The riverbed/bank material and the underlying aquifer act as natural filters to remove pollutants from river water. Solar distillation can be a viable method of drinking water production for individual households to small communities without the input of external energy. Sustainability framework and technology transfer are discussed through transdisciplinary analysis.

Hersteller:
Springer Verlag GmbH
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Chittaranjan Ray is Professor of Civil & Environmental Engineering and Interim Director of the Water Resources Research Center, University of Hawaii, Honolulu, Hawaii. Prior to joining the University of Hawaii, he worked as a research scientist at the Illinois State Water Survey at the University of Illinois. He received his Ph.D. in Civil Engineering from the University of Illinois at Urbana-Champaign and an M.S. degree in Civil Engineering from Texas Tech University. He was also employed as a staff engineer in the firm of Geraghty & Miller, Inc. in Hackensack, New Jersey (USA) conducting hazardous waste site investigation and water supply development for communities. He is a fellow of the American Society of Civil Engineers. He has published 5 books, over 100 scholarly papers, and many technical papers. His research work has been funded by the US National Science Foundation, US Environmental Protection Agency, US Department of Agriculture, US Department of Defense, and other agencies. Ravi K. Jain is Dean, School of Engineering and Computer Science, University of the Pacific. Prior to this appointment, he has held research, faculty, and administrative positions at the University of Illinois (Urbana-Champaign), Massachusetts Institute of Technology (MIT), and the University of Cincinnati. He received degrees in civil engineering (BS, MSCE) from California State University. He holds a Ph.D. from Texas Tech University and a Masters in Public Administration from Harvard University. He has directed major research programs for the US department of Defense and has served as chairman of the Environmental Engineering Research Council, ASCE. He is a member of the American Academy of Environmental Engineers, a fellow of ASCE, and a fellow of AAAS. He has been a Littauer fellow at Harvard University and a fellow of Churchill College, Cambridge University. He has published 14 books, over 150 scholarly papers and technical reports, and has received many awards and honors including the US Army's highest research award and was a recipient of the NSPE Founders Gold Medal and named Federal Engineering of the Year for 1989. 

Inhaltsangabe1. INTRODUCTION - Chittaranjan Ray and Ravi Jain1.1 Nature and Extent of the Problem 1.2 Water Contaminants 1.3 Topics Covered  2. DRINKING WATER TREATMENT TECHNOLOGY-COMPARATIVE ANALYSIS - Chittaranjan Ray and Ravi Jain2.1 Introduction2.2 Natural Filtration 2.3 Riverbank Filtration2.4 Slow Sand Filtration 2.5 Membrane Filtration2.6 Solar Distillation2.7 Solar Pasteurization 2.8 Technology Development Challenges2.9 Technological Implementation-Case Studies 3. SOLAR PASTEURIZATION - Ed Pejack3.1 Microbiology of Water Pasteurization 3.2 Use of Solar Cookers for Drinking Water Production 3.3 Devices Designed Specifically for Water 3.4 Simple devices from common materials 3.5 Commercial Devices in Production3.6 Devices with Recovery Heat Exchange 3.7 Water Pasteurization Indicators 3.8 Multi-Use Systems3.9 Summary  4. MEMBRANE DESALINATION - Kishore Rajagopalan4.1 Desalination Technologies 4.2 Thermal Desalination Technologies 4.3 Membrane Processes 4.4 Emerging Membrane Technologies4.5 Global Growth of Membrane Desalination4.6 Desalination Environment Interactions 4.7 Mitigation of Environmental Impacts 4.8 Membrane-Based Desalination at the Small and Medium Scale4.9 Integrated Approaches4.10 Conclusions 4.11 References  5. BANK FILTRATION AS NATURAL FILTRATION - Chittaranjan Ray, Jay Jasperse, and Thomas Grischek5.1 Introduction5.2 Natural Filtration's Implications for Sustainability5.3 How Does It Work?5.4 Regulatory Perspective5.5 Key Planning Considerations5.6 Site Characterization 5.7 Design Considerations5.8 Operational Considerations5.9 How Well Does It Work?5.10 Performance Assessment of RBF Systems 5.11 Areas of Future Study and Technology Development 5.12 Implementation, Challenges, Strategies  6. SOLAR DISTILLATION - Rahul Dev and G.N. Tiwari6.1 Introduction 6.2 Water characterization6.3 Solar Distillation: Basic Principle 6.4 Historical Background: Evaluation Process of Solar Stills6.5 Broad Classification of Solar Still 6.6 Various Methods of Fixing the Glass Cover onto the Solar Still Walls6.7 Heat Transfer and Thermal Modeling 6.8 Thermal Analysis: Development of Energy Balance Equations 6.10 Comparison of distillate yield for different active solar stills 6.11 Effect of Various Parameters 6.12 Cost, Energy and Exergy Issues Related to Water Production Through Solar Stills6.13 CO2 Emission, CO2 Mitigation and Carbon Credit Earned 6.14 Technology Transfer 6.15 Challenges in Adoption 7. TRANSDISCIPLINARY ANALYSIS - Ravi Jain7.1 Sustainability Concepts and Differing Views7.2 Industrial Practices: Suggested Options7.3 Sustainability of Technology in Developing Countries 7.4 Sustainability Framework 7.5 Technology Transfer and Implementation 1.1 Nature and Extent of the Problem 1.2 Water Contaminants 1.3 Topics Covered  2. DRINKING WATER TREATMENT TECHNOLOGY-COMPARATIVE ANALYSIS - Chittaranjan Ray and Ravi Jain2.1 Introduction2.2 Natural Filtration 2.3 Riverbank Filtration2.4 Slow Sand Filtration 2.5 Membrane Filtration2.6 Solar Distillation2.7 Solar Pasteurization 2.8 Technology Development Challenges2.9 Technological Implementation-Case Studies 3. SOLAR PASTEURIZATION - Ed Pejack3.1 Microbiology of Water Pasteurization 3.2 Use of Solar Cookers for Drink