改良UCT分段进水脱氮除磷工艺性能及物料平衡葛士建

　61　4　　　　　　　　　　　　Vol.61　No.4　20104　　CIESC　Journal　　　April　2010UCT葛士建1,彭永臻1,张　亮2,王希明1,王淑莹1(1,100124;2,150090):UCT,(COD)、、,。,,,COD、、43.5、8.51、0.29mg·L-1,A。,,67.1%();COD62.1%,;COD99.8%,。,71.7%。:;;UCT;:X703.1　　　　　　　:A:0438-1157(2010)04-1009-09PerformanceandmaterialbalanceofmodifiedUCTstepfeedenhancedbiologicalnitrogenandphosphateremovalprocessGEShijian1,PENGYongzhen1,ZHANGLiang2,WANGXiming1,WANGShuying1(1KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China;2StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,Heilongjiang,China)Abstract:TheremovalofwastewaternutrientsinthemodifiedUCTstepfeedprocesswasinvestigatedwhentreatingmunicipalwastewater.Basedonexperimentaldataundersteady-stateconditions,theequationsforcalculatingmaterialbalancesofCOD,nitrogenandphosphatewereestablished.Thesethreematerialdistributionsinthesystemwerealsoevaluated.Theresultsindicatedthatwithstableeffluentqualityandgoodcapacityofresistancetoshockload,theeffluentconcentrationsofCOD,TNandTPwere43.5,8.51,0.29mg·L-1onaverage,respectively,whichthefirstlevelAdischargestandardofpollutantsformunicipalwastewatertreatmentplantwasmet.Furthermore,accordingtocalculationequationsandtransformationpathwaysofnutrients,itwasfoundthatapproximately67.1%ofnitrogen　　2009-10-16,2009-11-19。:。:(1987—),,。:“”(2008ZX07314-008-01,2008ZX07317-007-105);(PXM2008014204050843);2008。　　　Receiveddate:2009-10-16.Correspondingauthor:Prof.PENGYongzhen,[e-mail]:supportedbytheNationalKeyScienceandTechnologySpecialProjects(2008ZX07314-008-01,2008ZX07317-007-105),theProjectofScientificResearchBaseandScientificInnovationPlatformofBeijingMunicipalEducationCommission(PXM2008014204050843)andtheKorea-ChinaJointResearchProjectonEnvironmentalTechnology.　wassuccessfullyremovedduringthedenitrificationprocess,includinganoxicdenitrificationprocessandsimultaneousnitrificationanddenitrification(SND)process,whichgreatlycontributedtohighnitrogenremovalefficiency.CODconsumedinthedenitrificationandphosphatereleaseprocessaccountedfor62.1%,whichembodiedtheadvantageofsufficientutilizationofinfluentcarbonsources.BothnitrogenandCODbalanceratioswereashighas99.8%,whichconfirmedthevalidityofequationsestablished.Phosphateremovalwasmainlyachievedbythedischargeofexcesssludge,accountingfor71.7%ofthetotal.Keywords:stepfeed;nitrogenandphosphateremoval;UCT;materialbalance　A2/O(anaerobic/anoxic/oxic)、,A2/O,,,,A2/O[1-3]。A2/OA/O(anoxic/oxic),,,[4]。Chang[5],///,3。Görgǜn[6],,。Vaiopoulou[7-9],9h,4L·h-1,60%、25%、15%,,。Zhu[10-12],,。UCTUCT(UniversityofCapetown),,,,。Nowak[13],(COD)、、,。Barker[14]、、///4(COD)。UCT,(COD)、、,,UCT(COD)、,。1　1.1　、、(1)。340L,,50cm×60cm×125cm,13、。,,,。,,50cm,,60°,90cm,88L,、。,22℃。:1.02m3·d-1,4∶3∶3,8～10h,10d,100%,50%～100%。1.2　;·1010·　　　　　　　　　　　　　　　　61N-(1-)-;COD5B-2COD;MLSS;MLVSS;;pH、ORP、DOWTWpH/Oxi340i。2　UCT2.1　UCT2,,α,NH+4-N、NO-x-NQαS0,NH+4-N+QR+∑αmax-1α=1QαS(α-1),NH+4-N=QR+∑αmaxα=1QαS(A※O)α,NH+4-N+ΔSα,NH+4-N,anoxicQαS0,NO-x-N+QR+∑αmax-1α=1QαS(α-1),NO-x-N=QR+∑αmaxα=1QαS(A※O)α,NO-x-N+ΔSα,NO-x-N,anoxic(1)　Qα,m3·d-1;α,α=1,2,3,…,;QR,m3·d-1;Sα,NH+4-NαNH+4-N,mg·L-1;S(A※O)α,NH+4-NαNH+4-N,mg·L-1;Sα,NO-x-NαNO-x-N;S(A※O)α,NO-x-NαNO-x-N(NO-x-N=NO-3-N+NO-2-N),mg·L-1;ΔSα,NH+4-N,anoxicαNH+4-N,g·d-1;ΔSα,NO-x-N,anoxicαNO-x-N,g·d-1。αNH+4-N、NO-x-N、TKN(2),(simultaneousnitrificationanddenitrification,SND),SND(3)QR+∑αmaxα=1QαS(A※O)α,NH+4-N=QR+∑αmaxα=1QαSα,NH+4-N+ΔSα,NH+4-N,oxicQR+∑αmaxα=1QαS(A※O)α,NO-x-N=QR+∑αmaxα=1QαSα,NO-x-N+ΔSα,NO-x-N,oxic·1011·　4　　:UCTQR+∑αmaxα=1QαS(A※O)α,TKN=QR+∑αmaxα=1QαSα,TKN+ΔSα,TKN,oxic(2)Sα,SND,oxic=ΔSα,TKN,oxic-ΔSα,NO-x-N,oxic-ΔSα,NH+4-N,assimilation(3)　ΔSα,NH+4-N,oxicαNH+4-N,g·d-1;ΔSα,NO-x-N,oxicαNO-x-N,g·d-1;ΔSα,TKN,oxicαTKN,g·d-1;Sα,SND,oxicαSND,g·d-1;ΔSα,NH+4-N,assimilationα,(7),g·d-1。1,1,(4)Q1S0,NH+4-N+QrS(A※O)1,NH+4-N=(Q1+Qr)S(A※O)1,NH+4-N+ΔS1,NH+4-N,anaerobicQ1S0,NO-x-N+QrS(A※O)1,NO-x-N=(Q1+Qr)S(A※O)1,NO-x-N+ΔS1,NO-x-N,anaerobicQ1S0,TKN+QrS(A※O)1,TKN=(Q1+Qr)S(A※O)1,TKN+ΔS1,TKN,anaerobic(4)　Qr1,m3·d-1;ΔS1,NH+4-N,anaerobic1NH+4-N,g·d-1;ΔS1,NO-x-N,anaerobic1NO-x-N,g·d-1;ΔS1,TKN,anaerobic1NO-x-N,g·d-1。,SDN,N=ΔS1,NO-x-N,anaerobic+∑αmaxα=1ΔSα,NO-x-N,anoxic+∑αmaxα=1Sα,SND,oxic(5)Seff,N=∑αmaxα=1Qα-QW(Seff,NO-x-N+Seff,TKN)(6)SW,N=XWfQWfNV(7)f=XW/XV(8)　XW、XV,mg·L-1;QW,m3·d-1;fNV,gN·(gVSS)-1,0.1gN·(gVSS)-1[15]。2.2　,,,,,,,(3),,(9)、(10)。Sinf,P=Seff,P+SW,P(9)∑αmaxα=1QαS0,TP=∑αmaxα=1Qα-QWSeff,TP+QWXWfPV(10)　fPVTP,3%[15]。2.3　COD,COD,COD4。3　UCTFig.3　PhosphatemassbalanceofmodifiedUCTstepfeedprocess·1012·　　　　　　　　　　　　　　　　614　UCTCODFig.4　CODmassbalanceofmodifiedUCTstepfeedprocess　　　αCOD,COD,(11)、(12),1(13)。QαS0,COD+QR+∑αmax-1α=1QαS(α-1),COD=QR+∑αmaxα=1QαS(A※O)α,COD+ΔSα,COD,anoxic(11)QR+∑αmaxα=1QαS(A※O)α,COD=QR+∑αmaxα=1QαSα,COD+ΔSα,COD,oxic(12)Q1S0,COD+QrS(A※O)1,COD=(Q1+Qr)S(A※O)1,COD+ΔS1,COD,anaerobic(13)　Sα,CODαCOD,mg·L-1;S(A※O)α,NH+4-NαCOD,mg·L-1;ΔSα,COD,anoxicαCOD,g·d-1;ΔSα,COD,oxicαCOD,g·d-1;ΔS1,COD,anaerobic1COD,g·d-1。,CODCO2SCO2,COD=ΔS1,COD,anaerobic+∑αmaxα=1ΔSα,COD,an