Análisis comparativo a través de metafrontera de la eficiencia técnico-económica de las EDARs
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Francesc Hernández Sancho [1] ; Ramón Sala Garrido [1]
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[1] Universitat de València
Universitat de València
Valencia, España
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- Localización: Anales de ASEPUMA, ISSN-e 2171-892X, Nº. 19, 2011
- Idioma: español
- Enlaces
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Resumen
- español
La evaluación de la eficiencia económica y técnica constituye una herramienta de gran utilidad para seleccionar la tecnología de tratamiento de aguas residuales más adecuada. Sin embargo, los modelos tradicionales usados para este fin, requieren que las unidades evaluadas operen bajo la misma tecnología. Para superar esta limitación, proponemos el uso de un modelo Data Envelopment Analysis (DEA) basado en el concepto de metafrontera no cóncava. De esta forma, es posible calcular tanto la eficiencia como el ratio de desfase tecnológico (RDT) de estaciones depuradoras de aguas residuales (EDARs) que utilizan tecnologías no homogéneas. Los resultados indican que la eficiencia media de las EDARs es alta y uniforme para las distintas tecnologías evaluadas. Además, los valores de RDT muestran que las EDARs que operan bajo la tecnología de fangos activados se encuentran en el óptimo en comparación con el resto de tecnologías evaluadas. En definitiva, este trabajo demuestra la utilidad que tiene la evaluación de la eficiencia de las EDARs a la hora de seleccionar la tecnología más adecuada para el tratamiento de aguas residuales.
- English
The assessment of economic and technical efficiency provides a useful tool to select the most appropriate technology for wastewater treatment. However, traditional models require that the units being assessed operate with the same technology. To overcome this limitation, we investigate the viability of using a non-concave metafrontier approach, which is based on Data Envelopment Analysis (DEA) to calculate techno-economical efficiency and Technological Gap Ratios (TGRs) of wastewater treatment plants (WWTPs) operating with non-homogeneous technology. The results indicate that mean efficiencies are relatively high and uniform across the different technologies. Furthermore, analysis of TGR values shows that the efficiency performance is optimal for WWTPs operating with activated sludge in comparison to the other evaluated technologies. Our study shows the importance of quantitatively comparing the efficiency of WWTPs that use different technologies, for managers to make informed decisions when selecting the most appropriate technology for wastewater treatment.
- español
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