Technical efficiency and cost analysis in wastewater treatment processes: A DEA approach

In light of the growing importance of water reuse as an alternative source of water resources in many regional areas, the objective of this paper is to analyse the efficiency of wastewater treatment plants as a basic requisite to improve the potential of the water reuse. The analytical benchmarking...

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Vydané v:	Desalination Ročník 249; číslo 1; s. 230 - 234
Hlavní autori:	Hernández-Sancho, Francesc, Sala-Garrido, Ramón
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Amsterdam Elsevier B.V 30.11.2009 Elsevier
Predmet:	Applications of mathematics to chemical engineering. Modeling. Simulation. Optimization Applied sciences Benchmarking methodology Chemical engineering Computational efficiency Computing time Cost analysis Cost structure DEA models Efficiency Exact sciences and technology General purification processes Mathematical analysis Mathematical models Methodology Pollution Reuse Sewerage works: sewers, sewage treatment plants, outfalls Wastewater Wastewater treatment Wastewaters Water reuse Water treatment and pollution Spain, Valencia Spain Benchmarking methodology DEA models Wastewater Cost structure Efficiency Water reuse Water treatment Reuse Maintenance Modeling Indicator Sewage treatment plant Waste water Cost analysis Waste water purification Mathematical programming
ISSN:	0011-9164, 1873-4464
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Abstract	In light of the growing importance of water reuse as an alternative source of water resources in many regional areas, the objective of this paper is to analyse the efficiency of wastewater treatment plants as a basic requisite to improve the potential of the water reuse. The analytical benchmarking methodology Data Envelopment Analysis (DEA) is used to calculate efficiency measurements. An efficiency index is obtained for each plant by means of mathematical programming techniques, aiming to minimise the inputs used in the water treatment process. This indicator is used as a reference to analyse plants' activity through a series of variables including the size of the plant or its cost structure. Given the importance of wastewater treatment in the Valencia Region (Spain), empirical research has been carried out for 338 plants located in this area. We verify the fact that the largest plants run more efficiently than smaller plants, as was to be expected. At the same time, there is evidence that a series of representative variables in the treatment process are clearly linked to efficiency. Maintenance and waste management costs are the most important factors to explain the differences between plants in terms of efficiency. Finally, the benchmarking methodology (Data Envelopment Analysis) is confirmed as a very useful management tool for the study of wastewater sector.
AbstractList	In light of the growing importance of water reuse as an alternative source of water resources in many regional areas, the objective of this paper is to analyse the efficiency of wastewater treatment plants as a basic requisite to improve the potential of the water reuse. The analytical benchmarking methodology Data Envelopment Analysis (DEA) is used to calculate efficiency measurements. An efficiency index is obtained for each plant by means of mathematical programming techniques, aiming to minimise the inputs used in the water treatment process. This indicator is used as a reference to analyse plants' activity through a series of variables including the size of the plant or its cost structure. Given the importance of wastewater treatment in the Valencia Region (Spain), empirical research has been carried out for 338 plants located in this area. We verify the fact that the largest plants run more efficiently than smaller plants, as was to be expected. At the same time, there is evidence that a series of representative variables in the treatment process are clearly linked to efficiency. Maintenance and waste management costs are the most important factors to explain the differences between plants in terms of efficiency. Finally, the benchmarking methodology (Data Envelopment Analysis) is confirmed as a very useful management tool for the study of wastewater sector. In light of the growing importance of water reuse as an alternative source of water resources in many regional areas, the objective of this paper is to analyse the efficiency of wastewater treatment plants as a basic requisite to improve the potential of the water reuse. The analytical benchmarking methodology Data Envelopment Analysis (DEA) is used to calculate efficiency measurements. An efficiency index is obtained for each plant by means of mathematical programming techniques, aiming to minimise the inputs used in the water treatment process. This indicator is used as a reference to analyse plants' activity through a series of variables including the size of the plant or its cost structure. Given the importance of wastewater treatment in the Valencia Region (Spain), empirical research has been carried out for 338 plants located in this area. We verify the fact that the largest plants run more efficiently than smaller plants, as was to be expected. At the same time, there is evidence that a series of representative variables in the treatment process are clearly linked to efficiency. Maintenance and waste management costs are the most important factors to explain the differences between plants in terms of efficiency. Finally, the benchmarking methodology (Data Envelopment Analysis) is confirmed as a very useful management tool for the study of wastewater sector.
Author	Hernández-Sancho, Francesc Sala-Garrido, Ramón
Author_xml	– sequence: 1 givenname: Francesc surname: Hernández-Sancho fullname: Hernández-Sancho, Francesc email: Francesc.Hernandez@uv.es organization: Dept. of Applied Economics II, Faculty of Economics, Campus dels Tarongers, University of Valencia, 46022 Valencia, Spain – sequence: 2 givenname: Ramón surname: Sala-Garrido fullname: Sala-Garrido, Ramón email: Ramon.Sala@uv.es organization: Dept. of Mathematics for Economics, Faculty of Economics, Campus dels Tarongers, University of Valencia, 46022 Valencia, Spain
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SubjectTerms	Applications of mathematics to chemical engineering. Modeling. Simulation. Optimization Applied sciences Benchmarking methodology Chemical engineering Computational efficiency Computing time Cost analysis Cost structure DEA models Efficiency Exact sciences and technology General purification processes Mathematical analysis Mathematical models Methodology Pollution Reuse Sewerage works: sewers, sewage treatment plants, outfalls Wastewater Wastewater treatment Wastewaters Water reuse Water treatment and pollution
Title	Technical efficiency and cost analysis in wastewater treatment processes: A DEA approach
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