Influence of impact assessment methods in wastewater treatment LCA |
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| Institution: | 1. Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Galicia, Spain;2. Peruvian LCA Network, Department of Engineering, Pontificia Universidad Católica del Perú, 1801 Avenida Universitaria, San Miguel, Lima 32, Perú;3. CETaqua, Water Technology Centre, 08940, Cornellà de Llobregat, Barcelona, Spain;4. Department of Economic Policy, University of Barcelona, Av. Diagonal, 690 08034 Barcelona, Spain;1. Irstea, UMR ITAP, ELSA Research Group & ELSA-PACT Industrial Chair for Environmental and Social Sustainability Assessment, 361 rue Jean François Breton, F-34196 Montpellier, France;2. LGEI, Ecole des mines d''Alès, 6 avenue de Clavières, 30319 Alès Cedex, France |
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| Abstract: | Facing the increase of environmental concern in the water treatment field, stakeholders need reliable decision support tools to assess environmental performances of urban and industrial wastewater systems. To discuss how life cycle assessment (LCA) can be applied to wastewater treatment projects, such an assessment has been performed through a case study on a full-scale plant. Methodological issues that had to be dealt with are briefly exposed. Five life cycle impact assessment (LCIA) methods have been used: CML 2000, Eco Indicator 99, EDIP 96, EPS and Ecopoints 97. Consistent assessment between these methods has been obtained for greenhouse effect, resources depletion and acidification. Eutrophication is correctly estimated if one looks at the potential impact of a treatment scenario but not at the characterization of the eutrophication state of a specific receiving stream. Work is needed concerning human toxicity as large discrepancies are noticed between the impact assessment methods. |
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