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Box-Behnken响应面法对夏季雨后窖水的PFS混凝处理工艺参数优化.docx

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Box-Behnken响应面法对夏季雨后窖水的PFS混凝处理工艺参数优化 Title:OptimizationofProcessParametersforPFSCoagulationTreatmentofSummerRainwaterAfterCisternUsingBox-BehnkenResponseSurfaceMethodology Abstract: Inthisstudy,theBox-Behnkenresponsesurfacemethodology(BBRSM)wasutilizedtooptimizetheprocessparametersforthetreatmentofsummerrainwateraftercisternusingpolymericferricsulfate(PFS)coagulant.TheaimofthisresearchwastodeterminetheoptimumconditionstoenhancethetreatmentefficiencyofcisternwaterwhileminimizingthedosageofPFS.Box-Behnkendesign(BBD)wasemployedtodesigntheexperimentallayout,andtheresponsesurfacemethodology(RSM)wasusedfordataanalysisandoptimization.Theeffectsofthreeindependentvariables,namelyPFSdosage,reactiontime,andpH,wereinvestigatedontheresponsevariable,i.e.,removalefficiencyofvariouscontaminants.TheresultsshowedthattheBBRSMsuccessfullyoptimizedtheprocessparameters,resultinginhighremovalefficienciesofturbidity,totalsuspendedsolids,andchemicaloxygendemand. 1.Introduction: Waterscarcityandpollutedwatersourcesareincreasinglybecomingaglobalconcern.Rainwaterharvestingandstorageincisternshavegainedattentionasanalternativewatersource,particularlyinareaswithlimitedaccesstotreatedwater.However,thequalityofthewaterstoredincisternsafterrainfallcanbecompromisedduetovariouscontaminantssuchassuspendedsolids,turbidity,andorganicmatter.Coagulationisacommonlyusedtreatmentprocesstoremovetheseimpurities.Polymericferricsulfate(PFS)isanefficientcoagulantthathasshownpromisingresultsintheremovalofcontaminantsfromwatersources.ThisstudyaimstooptimizetheprocessparametersforPFScoagulationtreatmentofsummerrainwateraftercisternusingtheBox-Behnkenresponsesurfacemethodology(BBRSM). 2.MaterialsandMethods: 2.1ExperimentalDesign: ABox-Behnkendesign(BBD)withthreeindependentvariables,namelyPFSdosage,reactiontime,andpH,wasadoptedfortheexperiments.Thedesignmatrixconsistedof15experimentalruns,including5centralpoints.Theremovalefficienciesofturbidity,totalsuspendedsolids,andchemicaloxygendemandweremeasuredasresponsevariabl