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Comprehensive assessment for surface water treatment with membrane processes
Besides conventional treatment processes as flocculation, coagulation and filtration, membrane processes can be utilised for the treatment of surface water in solids rich environment in the production of drinking water. The aim of the study is the assessment of three processes for the production of drinking water by treatment of surface water in terms of technical, economical and ecological aspects as a comprehensive assessment approach. The process of ultrafiltration with immersed membranes has been tested at a pilot plant on the river Aare, Switzerland for three months. The immersed membrane system was tested regarding to the filtration performance under variation of typical technical parameters and different additives such as flocculants. For the conventional process designed as double layer filtration and the ultrafiltration process with pressure tubes the results of previous investigations at the same site have been evaluated. The following preliminary planning of a treatment plant with a capacity of 20.000 m3/d establishes the basis of the comprehensive assessment. In order to determine the optimal technical solution a value benefit analysis was realised. The profitability of the processes investigated was verified by the determination of the net present value in a detailed cost analysis. Finally, an ecobalance was realised by determining and assessing all material and energy flows within the regarded system. However, none of the processes can be considered as advantageous in technical, economical as well as ecological respects. While the ultrafiltration process with immersed membranes can be regarded as the best technical solution for the drinking water treatment of surface water with high turbidity, the economic efficiency of th conventional process with double layer filtration has been assessed as highest with the highest net present value. As the result of the ecological assessment the process of the ultrafiltration with immersed membranes has been identified as the most environmental friendly one. However, it can be stated that a single criterion such as energy consumption can not be applied as an argument for or against a treatment technology as it is rather important to regard the treatment process as a system which has to be assessed comprehensively.
Comprehensive assessment for surface water treatment with membrane processes
Besides conventional treatment processes as flocculation, coagulation and filtration, membrane processes can be utilised for the treatment of surface water in solids rich environment in the production of drinking water. The aim of the study is the assessment of three processes for the production of drinking water by treatment of surface water in terms of technical, economical and ecological aspects as a comprehensive assessment approach. The process of ultrafiltration with immersed membranes has been tested at a pilot plant on the river Aare, Switzerland for three months. The immersed membrane system was tested regarding to the filtration performance under variation of typical technical parameters and different additives such as flocculants. For the conventional process designed as double layer filtration and the ultrafiltration process with pressure tubes the results of previous investigations at the same site have been evaluated. The following preliminary planning of a treatment plant with a capacity of 20.000 m3/d establishes the basis of the comprehensive assessment. In order to determine the optimal technical solution a value benefit analysis was realised. The profitability of the processes investigated was verified by the determination of the net present value in a detailed cost analysis. Finally, an ecobalance was realised by determining and assessing all material and energy flows within the regarded system. However, none of the processes can be considered as advantageous in technical, economical as well as ecological respects. While the ultrafiltration process with immersed membranes can be regarded as the best technical solution for the drinking water treatment of surface water with high turbidity, the economic efficiency of th conventional process with double layer filtration has been assessed as highest with the highest net present value. As the result of the ecological assessment the process of the ultrafiltration with immersed membranes has been identified as the most environmental friendly one. However, it can be stated that a single criterion such as energy consumption can not be applied as an argument for or against a treatment technology as it is rather important to regard the treatment process as a system which has to be assessed comprehensively.
Comprehensive assessment for surface water treatment with membrane processes
Umfassende Bewertung der Wasseroberflächenbehandlung mit Membranprozessen
Seidel, T. (author) / Jatzkowski, K. (author) / Kraft, A. (author)
2002
6 Seiten, 5 Bilder, 4 Quellen
Conference paper
English
Adsorption , Bewertung , Doppelschicht , Eintauchen , Energieverbrauch , Filtration , Membran , Oberflächenwasser , Ökologie , Ökonomie , technische Daten , Trennung (von Stoffen) , Trinkwasser , Trinkwasseraufbereitung , Ultrafiltration , Umweltverträglichkeit , Vergleichsmessung , Vergleichsuntersuchung , Wasserreinhaltung
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