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How does seasonality affect water reuse possibilities? An efficiency and cost analysis

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  • Sala-Garrido, Ramón
  • Molinos-Senante, María
  • Hernández-Sancho, Francesc

Abstract

Because of the harsh conditions of water stress and seasonal water demand in many zones, water reuse has emerged as a key alternative for achieving sustainable water management. An efficient performance by wastewater treatment plants (WWTPs) in technical and economic terms favors water reuse. However, seasonality in the flow of wastewater and in the pollutant load may be a determining factor in the efficiency of WWTPs. To evaluate if seasonality affects WWTP efficiency, analytical benchmarking methodology Data Envelopment Analysis (DEA) is used to obtain an average efficiency score for seasonal and non-seasonal plants. Given the importance of extended aeration (EA) and activated sludge (AS) technologies, empirical research has been carried out for both processes. It is confirmed that non-seasonal WWTPs are more efficient than seasonal plants, and this is especially true for AS plants as seasonality has a greater effect on this technology. Energy cost is the most important factor for explaining operational cost differences between seasonal and non-seasonal plants. The results of this study show how economic and management strategies can be applied to optimize the use of resources.

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  • Sala-Garrido, Ramón & Molinos-Senante, María & Hernández-Sancho, Francesc, 2012. "How does seasonality affect water reuse possibilities? An efficiency and cost analysis," Resources, Conservation & Recycling, Elsevier, vol. 58(C), pages 125-131.
    • Handle: RePEc:eee:recore:v:58:y:2012:i:c:p:125-131
    DOI: 10.1016/j.resconrec.2011.11.002
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    References listed on IDEAS

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    1. Ziyang Guo & Yongjun Sun & Shu-Yuan Pan & Pen-Chi Chiang, 2019. "Integration of Green Energy and Advanced Energy-Efficient Technologies for Municipal Wastewater Treatment Plants," IJERPH, MDPI, vol. 16(7), pages 1-29, April.
    2. Massarutto, Antonio & Grassetti, Luca & Lambardi di San Miniato, Michele & Moletta, Mattia, 2023. "Efficient firms are all alike, but every inefficient firm is such in its own way: Heterogeneity of costs determinants in the Italian water sector," Utilities Policy, Elsevier, vol. 84(C).
    3. Alda A. Henriques & Milton Fontes & Ana S. Camanho & Giovanna D’Inverno & Pedro Amorim & Jaime Gabriel Silva, 2022. "Performance evaluation of problematic samples: a robust nonparametric approach for wastewater treatment plants," Annals of Operations Research, Springer, vol. 315(1), pages 193-220, August.

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