分段进水AO工艺流量分配专家系统的建立与应用王伟

　59　10　　　　　　　　　　　　　　　　　　Vol.59　No.10　200810　　Journal　of　Chemical　Industry　and　Engineering　(China)　　　October　2008A/O王　伟,王淑莹,孙亚男,彭永臻(,100022):A/O,,。3:、,,,A/O。、,。,,。:;;;;:X703.1　　　　　　:A:0438-1157(2008)10-2608-08Establishmentandapplicationofinfluentflowdistributionexpertsysteminstep-feedA/OprocessWANGWei,WANGShuying,SUNYanan,PENGYongzhen(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China)Abstract:Inthestep-feedanoxic/oxic(A/O)process,influentflowdistributionratioisacrucialcontrolparameter,whichpromisessteadyoperationofthesystemanddominatesthisprocess.Threedifferentinfluentflowdistributionmethodsproposedinthispaperinclude:(i)sameF/Mratiotonitrifiers;(ii)optimalcoefficientand(iii)voluminousinfluentattheendofsystem.Basedonthedistributionmethodspresentedabove,atechnicallyfeasibleandeconomicallyfavorableexpertcontrolsystemofflowdistributionwasestablishedonthebasisofthedataobtainedfromapilot-scaledomesticwastewatertreatmentsystem.Therelatedinformationfromliteratureandtheknowledgeofhumanexpertsacquiredthroughyearsofexperiencewerealsoincorporated.Thesuggestedinfluentflowdistributionmethoddefinedbyexpertsystemisdirectlydecidedbyinfluentloadingandrawwastewatercharacteristics,aswellaseffluentquality.Finally,theapplicationofthisexpertsystemwasillustratedbyusingoneday'sdatafromarealplant,whichrepresentsthetypicalchangesofinfluentflowsandwastewatercharacteristics.Keywords:wastewater;biologicalnitrogenremoval;step-feed;influentflowdistribution;expertsystem　　2008-02-25,2008-07-03。:。:(1979—),,。:(2006AA06Z319);-;(20060005002)。　　　Receiveddate:2008-02-25.Correspondingauthor:Prof.PENGYongzhen.E-mail:[e-mail]:supportedbytheHigh-techResearchandDevelopmentProgramofChina(2006AA06Z319),ScientificResearchBaseandScientificInnovationPlatformofBeijingMunicipalEducationCommission,andtheDoctoralProgramFoundationofInstitutionsofHigherEducationofChina(20060005002).　　/(A/O)。,,,;,,[1-5]。,,。、,、,。,、,,,[6-8]。A/O,,A/O,,,,,,。1　A/O1.1　A/OA/O1。。,。1,1r1Q,1,r1QNO-x-N,2,2r2Q,,rnQNOx-NCOD。1.2　3:、,,,。1。1.2.1　等负荷流量分配法　。A/O,,(MLSS),F/M(/)。F/MF/M,。,。F/M,,rnr1=r+r1r+r1+…+ri+…+rn　(i=2,3,…,n)(1)　rii(i=2,3,…,n),r。,r1+…+ri+…+rn=1。r,,F/M,,。1　A/OFig.1　Configurationandmassbalancediagramofstep-feedA/OprocessQ—totalinfluentflowrate;ri—fractionofinfluentflowfedtostepi;r—returnedactivatedsludgerecycleratio;S0—influentCODconcentration,mg·L-1;A0—influentTKNconcentration,mg·L-1;Ne—effluentnitrateconcentration,mg·L-1·2609·　10　　:A/O1.2.2　流量分配系数法　,、,。1,iCODNO-3-N(SiNi)S0A0Si=rir1+r2+…+ri+rS0(2)Ni=ri-1r1+r2+…+ri+rA0(3)i(4)ri=αA0S0ri-1　(i=2,3,…,n)(4),α,NO-3-N,BOD5COD,CODCr[mgCODCr·(mgNO-3-N)-1]。,(SRT)、、。(4),,,。,,αA0S0,riri-1,riri-1=αA0S0=δopt,δopt。CODCr/TKN≥α,δopt≤1,;CODCr/TKNα,δopt1,。1.2.3　末端集中进水　,,,。,,,,。,。,,,,。,、,。,,,,。2　2.1　2。320L,4,13。2∶3。,90L。5,,4。2.2　、。CODCr235～280mg·L-1,NH+4-N44～55mg·L-1,BOD5110～150mg·L-1,NO-3-N0.05～1.42mg·L-1,NO-2-N0.08～0.19mg·L-1。,,。2.3　CODCr、NH+4-N、NO-2-N、NO-3-N、MLSS2　Fig.2　Schematicdiagramofpolit-scalestep-feednitrogenremovalprocessD1～D4—anoxiczoneofthefirsttothefourthstage;Nij—thejaerobiczoneoftheistage　·2610·　　　　　　　　　　　59　[9],TNmultiN/C3000,NH+4-N、NO-x-NWTWTresConNH+4-NNO-x-N;DO、WTW340i。3　A/O3.1　、。,。、,A/O,、,,。,[7,10]。,,,、,,,。。,“”“”,“”。,“”,。3.2　A/OA/O:(1);(2);(3)。1mg·L-1,,5mg·L-1,。,,。、,A/O,3。、,1mg·L-1。,,。1mg·L-1,,,。C/Nα,α,、C/N,,,;、C/N,,,,TN,,,。1mg·L-1,,,,DO,。,F/M,,,。1mg·L-1,5mg·L-1。5mg·L-1,。,,C/Nα,α,,,,,。C/Nα,F/M,,。,,,。5mg·L-1,,。,,SS,SS,,SS,。,(),SS,,,,;,MLSS·2611·　10　　:A/O·2612·　　　　　　　　　　　59　,,,,。,,,F/M,,,。,,C/Nα,α,、C/N,。C/N,,,,,,,。C/Nα,、C/N。,,,。,,。4　,(4)。,,。21:30～03:30,。5(a)。15.2mg·L-1,。7.18mg·L-1,TN26.37mg·L-1,TN56.15%。,5(b)。,。21:30,6.7mg·L-1,5mg·L-1,,、C/N,。,6.9mg·L-1,15.2mg·L-1;4.51mg·L-1,TN24.26mg·L-1,TN59.14%。,,A/O,TN,。,。,。,α7.0。4(6):(1)COD280mg·L-1,40mg·L-1,C/N=7;(2)COD360mg·L-1,90mg·L-1,C/N=4;(3)COD360mg·L-1,40mg·L-1,C/N=9;(4)COD540mg·L-1,60mg·L-1,C/N=9。:,C/N,,C/N。C/N=7,δopt=1.0,0.25∶0.25∶0.25∶0.25;·2613·　10　　:A/OC/N=4,δopt=1.75,0.096∶0.17∶0.29∶0.51;C/N=9,δopt=0.78,0.35∶0.27∶0.21∶0.16。7(a)。4.73mg·L-1,14.56mg·L-1,TN22.67mg·L-1,TN58.67%。7(a),14.56mg·L-1,。:,7(b)。,22h,5mg·L-1,、C/N,。7(b),,,(19:30)(22:00)2h,6.78mg·L-114.56mg·L-1,。,2.07mg·L-1,TN16.48mg·L-1,TN68.49%,,TN9.82%。6　Fig.6　Characteristicsofinfluentflowwastewater　5　　(1)、3A/O,,、C/N,,。,7　,Fig.7　Comparisonofeffluentqualityofsystemwithandwithoutexpertcontrolsystem　、,。(2)、,,,。,A/O。References[1]　GögǜnE,ArtanN,OrhonD,etal.Evaluationofnitrogenremovalbystepfeedinginlargetreatmentplants.Wat.Sci.Tech.,1996,34(1/2):253-260[2]　LarreaL,LarreaA,AyesaE,etal.Developmentandverificationofdesignandoperationcriteriaforthestepfeedprocesswithnitrogenremoval.Wat.Sci.Tech.,2001,43(1):261-268[3]　deBallilloC,CarrioL,MahoneyK,etal.Practicalconsiderationsfordesignofastep-feedbiologicalnutrientremovalsystem.FloridaWaterResourcesJournal,2002(1):18-20[4]　GeorgeT,FranklinLB,DavidStenselH.WastewaterEngineeringTreatmentandReuse.NewYork:Metcalf&Eddy,Inc.,2003[5]　OlssonG,NielsenMK,YuanZ,etal.Instrumentation,ControlandAutoma