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Application of life cycle assessment for an evaluation of wastewater treatment and reuse project--case study of Xi'an, China

Application of life cycle assessment for an evaluation of wastewater treatment and reuse project--case study of Xi'an, China

Bioresource Technology 101(5): 1421-1425

In order to illuminate the benefit of a wastewater treatment and reuse project, a life cycle assessment (LCA) model was proposed by combining the process-based LCA and the input-output based LCA in one framework and using energy consumption as the sole parameter for quantitative evaluation of the project. The life cycle consumption was evaluated mainly by life cycle inventory (LCI) analysis taking into account the construction phase, operation phase and demolishment phase of the project. For evaluating the life cycle benefit of treated water reuse, attention was paid to the decrease of secondary effluent discharge and water saving. As a result of comprehensive LCA analysis of a case project in Xi'an, China, it was understood that the life cycle benefit gained from treated wastewater reuse much surpassed the life cycle energy consumption. The advantage of wastewater treatment and reuse was well shown by LCA analysis using the proposed model.

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Accession: 051610829

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PMID: 19556124

DOI: 10.1016/j.biortech.2009.05.071

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