Conditional Order-m Efficiency of Wastewater Treatment Plants: The Role of Environmental Factors

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Title: Conditional Order-m Efficiency of Wastewater Treatment Plants: The Role of Environmental Factors
Authors: Fuentes Pascual, Ramón | Torregrosa, Teresa | Ballenilla, Enrique
Research Group/s: Economía del Turismo, Recursos Naturales y Nuevas Tecnologías (INNATUR) | Recursos Hídricos y Desarrollo Sostenible
Center, Department or Service: Universidad de Alicante. Departamento de Análisis Económico Aplicado
Keywords: Conditional efficiency | Exogenous variables | Free disposal hull (FDH) | Order-m | Robust estimation | Wastewater
Knowledge Area: Economía Aplicada
Issue Date: 15-Oct-2015
Publisher: MDPI
Citation: Fuentes R, Torregrosa T, Ballenilla E. Conditional Order-m Efficiency of Wastewater Treatment Plants: The Role of Environmental Factors. Water. 2015, 7(10): 5503-5524. doi:10.3390/w7105503
Abstract: The growing economic and environmental importance of managing water resources at a global level also entails greater efforts and interest in improving the functioning and efficiency of the increasingly more numerous wastewater treatment plants (WWTPs). In this context, this study analyzes the efficiency of a uniform sample of plants of this type located in the region of Valencia (Spain). The type of efficiency measure used for this (conditional order-m efficiency) allows continuous and discrete contextual variables to be directly involved in the analysis and enables the assessment of their statistical significance and effect (positive or negative). The main findings of the study showed that the quality of the influent water and also the size and age of the plants had a significant influence on their efficiency levels. In particular, as regards the effect of such variables, the findings pointed to the existence of an inverse relationship between the quality of the influent water and the efficiency of the WWTPs. Also, a lower annual volume of treated water and more modern installations showed a positive influence. Additionally, the average efficiency levels observed turned out to be higher than those reported in previous studies.
URI: http://hdl.handle.net/10045/50405
ISSN: 2073-4441
DOI: 10.3390/w7105503
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
Peer Review: si
Publisher version: http://dx.doi.org/10.3390/w7105503
Appears in Collections:INV - INNATUR - Artículos de Revistas
INV - Recursos Hídricos y Desarrollo Sostenible - Artículos de Revistas

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