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1、ScienceoftheTotalEnvironment409(2011)2693–2699ContentslistsavailableatScienceDirectScienceoftheTotalEnvironmentjournalhomepage:www.elsevier.com/locate/scitotenvEnergyefficiencyinSpanishwastewatertreatmentplants:Anon-radialDEAapproacha,⁎,M.Molinos-Senante
2、a,1b,2F.Hernández-Sancho,R.Sala-GarridoaDepartmentofAppliedEconomicsII,UniversitatdeValencia,CampusdelsTarongers,46022,Valencia,SpainbDepartmentofMathematicsforEconomics,UniversitatdeValencia,CampusdelsTarongers,46022,Valencia,SpainarticleinfoabstractAr
3、ticlehistory:Wastewatertreatmentplants(WWTPs)areenergy-intensivefacilities.Thus,reducingtheircarbonfootprintReceived15January2011isparticularlyimportant,botheconomicallyandenvironmentally.KnowingtherealoperatingenergyReceivedinrevisedform5April2011effici
4、encyofWWTPsisthestartingpointforanyenergy-savinginitiative.Inthisarticle,weappliedanon-Accepted9April2011radialDataEnvelopmentAnalysis(DEA)methodologytocalculateenergyefficiencyindicesforsamplingofAvailableonline6May2011WWTPslocatedinSpain.Inasecondstage
5、analysis,weexaminedtheoperatingvariablescontributingtodifferencesinenergyefficiencyamongplants.ItisverifiedthatenergyefficienciesoftheanalyzedWWTPsKeywords:Energyefficiencywerequitelow,withonly10%ofthembeingefficient.Wefoundthatplantsize,quantityoforganicmat
6、terNon-radialDEAremoved,andtypeofbioreactoraerationweresignificantvariablesinexplainingenergyefficiencyWastewatertreatmentdifferences.Incontrast,ageoftheplantwasnotadeterminingfactorinenergyconsumption.Lastly,weCO2emissionsquantifiedthepotentialsavings,bot
7、hineconomictermsandintermsofCO2emissions,thatcouldbeEnergysavingexpectedfromanimprovementinenergyefficiencyofWWTPs.©2011ElsevierB.V.Allrightsreserved.1.Introductionseveraldecadesenergyconsumptionhasgrownconsiderably,boththroughincreasesintreatedvolumeand
8、theimplementationofnewItiswellknownthatwaterandenergyarecloselylinked.Everytechnologiesaimedatachievinghighereffluentqualities(Nakagawastepintheintegratedwatercycle–drinkingwatertreatmentandetal.,2006).supply,wastewatercollection,
