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Technical University of Denmark (DTU) (2010)

Desalinated water in urban water supplies – a systems approach to identify optimal drinking water composition

Rygaard, Martin

Titre : Desalinated water in urban water supplies – a systems approach to identify optimal drinking water composition

Auteur : Rygaard, Martin

Université de soutenance : Technical University of Denmark (DTU)

Grade : Doctoral Thesis (PhD) 2010

Résumé
The use of alternative water supply technologies like desalination and wastewater reclamation are growing rapidly all over the world. These treatment techniques make drastic changes to the water chemistry and there is a potential for optimizing and designing drinking water composition. This thesis describes the drivers and implications of using alternative water supply techniques in urban water supplies. A new method for valuing the impacts of changed water quality has been developed. The water quality impacts include effects on health (cardiovascular disease, atopic eczema, dental caries), lifetime of assets (washing machines, dish washers, water heaters and distribution system), laundry detergent consumption, and effects on bottled water sales. The economic impacts are compared with changed production costs, costs of water resource management, costs of remineralization options, and potential costs of mitigating green house gas emissions from water production. Results from two cases from Copenhagen (Denmark) and Perth (Western Australia) show that the benefits of the introduction of desalinated water remineralized with magnesium and fluoride can exceed changes in production costs, costs of remineralizing the water, and costs of mitigating green house gas emissions. Desalinated water without added magnesium and fluoride is predicted to have a negative impact on the societal economy. Based on the results from the two case studies a new set of optimum water quality criteria is proposed.

Présentation (DTU Orbit)

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Page publiée le 9 octobre 2012, mise à jour le 17 juillet 2017