C. Ray – författare
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4 produkter
4 produkter
Riverbank Filtration: Understanding Contaminant Biogeochemistry and Pathogen Removal
Inbunden, Engelska, 2002
1 598 kr
Skickas inom 10-15 vardagar
Riverbank filtration is widely used in Europe and to some extent in the United States for the public water supply. It is a cost-effective and realisable treatment technology in which horizontal and vertical wells pump a mixture of ground water and induced surface water from a river. This book describes the biogeochemical issues involved in contaminant removal from surface water and the mechanisms of pathogen removal. Specifically, the following three points are considered: the role of hydrogeological and well construction factors in the development of redox zones at bank filtration sites and the resulting impacts on contaminant removal; the mechanisms of pathogen removal, including the processes, colloid filtration, die-away, decay and predation; and the status of riverbank filtration processes in NATO partner countries.
Riverbank Filtration: Understanding Contaminant Biogeochemistry and Pathogen Removal
Häftad, Engelska, 2002
1 598 kr
Skickas inom 10-15 vardagar
Riverbank filtration is widely used in Europe and to some extent in the United States for the public water supply. It is a cost-effective and realisable treatment technology in which horizontal and vertical wells pump a mixture of ground water and induced surface water from a river. This book describes the biogeochemical issues involved in contaminant removal from surface water and the mechanisms of pathogen removal. Specifically, the following three points are considered: the role of hydrogeological and well construction factors in the development of redox zones at bank filtration sites and the resulting impacts on contaminant removal; the mechanisms of pathogen removal, including the processes, colloid filtration, die-away, decay and predation; and the status of riverbank filtration processes in NATO partner countries.
537 kr
Skickas inom 10-15 vardagar
For more than 100 years, riverbank filtration (RBF) has been used to produce drinking water by inducing surface water to flow downward through sediment and into a pumping well. During this process, potential contaminants are filtered from the water, significantly improving water quality. Written by over thirty experts from the United States and Europe, this book explores three themes - the mechanics behind RBF, its ability to remove contaminants from surface water, and critical research needs. Individual chapter topics range from the occurrence and fate of pesticides, pharmaceuticals, and personal care products at RBF sites to using RBF as a pre-treatment for nanofiltration membranes. This book describes the current and state-of-the-art applications of RBF technology as currently practised in two continents. No other resource like it exists. Its purpose is to show that RBF is a low-cost and efficient alternative water treatment process for dinking-water applications.
537 kr
Skickas inom 10-15 vardagar
Chittaranjan Ray, Ph. D. , P. E. University of Hawaii at Mãnoa Honolulu, Hawaii, United States Jürgen Schubert, M. Sc. Stadtwerke Düsseldorf AG Düsseldorf, Germany Ronald B. Linsky National Water Research Institute Fountain Valley, California, United States Gina Melin National Water Research Institute Fountain Valley, California, United States 1. What is Riverbank Filtration? The purpose ofthis book is to show that riverbank filtration (RBF) isa low-cost and efficient alternative water treatment for drinking-water applications. There are two immediate benefits to the increased use of RBF: Minimized need for adding chemicals like disinfectants and coagulants to surface water to control pathogens. Decreased costs to the community without increased risk to human health. Butwhat,exactly, isRBF? In humid regions, river water naturally percolates through the ground into aquifers (which are layers of sand and gravel that contain water underground) during high-flow conditions. In arid regions, most rivers lose flow, and the percolating water passes through soil and aquifer material until it reaches the water table. During these percolation processes, potential contaminants present in river water are filtered and attenuated. If there are no other contaminants present in the aquifer or ifthe respective contaminants are present at lower concentrations, the quality of water in the aquifer can be ofhigher quality than that found in theriver. In RBF, production wells — which are placed near the banks ofrivers —pump large quantities ofwater.