高效气升循环式短程硝化工艺性能陈建伟

　61　3　　　　　　　　　　　　Vol.61　No.3　20103　　CIESC　Journal　　　March　2010陈建伟,郑　平,丁　爽,张吉强,唐崇俭(,310029):(partialnitrification,PN)。,,30℃、358.5～942.3mg·L-1,0.86～2.00h,12～28,5.5kgN·m-3·d-1,。,、pH,、3.1%～16.8%,4.3%～26.5%0.4%～5.3%。。4.0～5.2gVSS·L-1,2.71gN·(gVSS)-1·d-1。:;;;:X703.1　　　　　　:A:0438-1157(2010)03-0740-07Performanceofpartialnitrificationprocesswithhigh-rateair-liftcirculationreactorCHENJianwei,ZHENGPing,DINGShuang,ZHANGJiqiang,TANGChongjian(DepartmentofEnvironmentalEngineering,ZhejiangUniversity,Hangzhou310029,Zhejiang,China)Abstract:Thepartialnitrification(PN)processwasinvestigatedat30℃inanair-liftcirculation(ALC)reactorfedwithsimulatedwastewater.Theresultsprovedthatitwasahighly-efficientprocessforammoniaremoval.TheturnoveroftheALCreactorwas12—28timesperdaywithhydraulicretentiontimebetween0.86hand2.00h.Wheninfluentconcentrationsofammoniawereincreasedfrom358.5to942.3mg·L-1,theaveragevolumetricammoniaremovalratereachedashighas5.5kgN·m-3·d-1,whichwasatthetoplevelreportedintheliterature.Duringtheoperation,therelativestandarddeviationofeffluentsubstrateconcentration,ammoniaremovalefficiencyandnitriteaccumulationwas4.3%—26.5%,3.1%—16.8%and0.4%—5.3%,respectively,inspiteoffluctuationofinfluentconcentration,flowrateorpH.Thestabilityofprocessperformancecouldbeattributedtoboththeefficientretentionofsludge(4.0—5.2gVSS·L-1)andthehighspecificactivityofbiomass(2.71gN·(gVSS)-1·d-1determinedfromthekineticstudy).Keywords:partialnitrification;highloadingrate;air-liftcirculationreactor;processperformance　　2009-08-26,2009-09-21。:。:(1983—),,。:(2006AA06Z332);(30770039)。　　　Receiveddate:2009-08-26.Correspondingauthor:Prof.ZHENGPing,[e-mail]:supportedbytheHigh-techResearchandDevelopmentProgramofChina(2006AA06Z332)andtheNationalNaturalScienceFoundationofChina(30770039).　　(partialnitrification,PN)、、,(1)[1]。,(anaerobicammoniumoxidation,Anammox)[(2)[2]],。NH+4+1.5O2NO-2+2H++H2O(1)NH+4+1.32NO-2+0.066HCO-3+0.13H+1.0N2+0.26NO-3+0.066CH2O0.5N0.15+2.03H2O(2)Anammox26kgN·m-3·d-1[3];PN3.3kgN·m-3·d-1[4],。PN(AOB),Nitrosomonas,6～8gNH+4-N·(gVSS)-1·d-1[1]。,PN。,。1　1.1　[5],1。,,8cm、80cm;,20cm、20cm,10L,5L,5L。。,。1,500～800mgNH+4-N·L-1,(HRT)1.2h,30℃。5L,4.1gVSS·L-1。(30±1)℃。1.2　,(g·L-1):KH2PO40.01,CaCl2·2H2O0.0056,MgSO4·7H2O0.3;Ⅰ、Ⅱ1ml·L-1。Ⅰ(g·L-1):EDTA1　Fig.1　Schematicdiagramofpartialnitrificationprocess1—storagetank;2—wastewaterpump;3—blower;4—air-liftreactor;5—effluent　5,FeSO45。Ⅱ(g·L-1):EDTA15,H3BO40.014,MnCl2·4H2O0.99,CuSO4·5H2O0.025,ZnSO4·7H2O0.43,NiCl2·6H2O0.19,NaSeO4·10H2O0.21,NaMoO4·2H2O0.22。NH+4-N(NH4)2SO4,NaHCO3,。1.3　,,。,5,1gVSS·L-1,5mg·L-1,pH7～8,(30±0.5)℃(),,。,,。3～10min,1%,。3。1.4　:-;:N-(1-)-;:;SS、VSS:[6]。pH:pHS-9V。:。2　2.1　2.1.1　高基质浓度　,·741·　3　　:。,。,Anammox,50%。37d,358.5～942.3mg·L-1,602.3mg·L-1(2)。(3)[7],(FA)9.1～42.3mg·L-1,21.7mg·L-1。,FA1.0～7.0mg·L-1,FA40.0mg·L-1[7-12]。,,。,,0～49.2mg·L-1,19.0mg·L-1,6.3%。CFACt,NH3=10pHe6344/(273+T)+10pH(3)2　、Fig.2　Variationofinfluentandeffluentnitrogenconcentrationduringoperation　2.1.2　高容积效能　,5L,,60.0～140.0L·d-1,(HRT)0.86～2.00h(3),12～28。3,358.5～942.3mg·L-1,(VLR)6.7～15.1kgN·m-3·d-1,11.1kgN·m-3·d-1,(VRR)4.0～6.8kgN·m-3·d-1,5.5kgN·m-3·d-1。,VRR7.5kgN·m-3·d-1[13]。VRR3.3kgN·m-3·d-1[4],1.4～1.6kgN·m-3·d-1[14-15]。。4。,VLR6.7～15.1kgN·m-3·d-1,36.0%～64.6%,50.0%,;84.9%～100%,。2.2　2.2.1　抗基质浓度波动的性能　PN。、。,。1,4·742·　　　　　61　1　Table1　EffectoffluctuationofsubstrateconcentrationonstabilityofpartialnitrificationprocessItemSeriesⅠⅡⅢⅣammoniuminfluentconcentration/mg·L-1　range580.4—942.3553.2—742.8493.4—686.4358.5—540.7　difference362.0189.6193.0182.2　standarddeviation162.066.964.554.3　average789.8610.4588.1441.9　relativestandarddeviation/%20.511.011.012.3ammoniumeffluentconcentration/mg·L-1　range205.5—426.8246.0—416.7187.6—325.7216.7—305.5　difference221.3170.7138.288.8　standarddeviation83.658.549.731.7　average315.4306.0258.5252.7　relativestandarddeviation/%26.519.119.212.5ammoniumremovalefficiency/%　range54.7—60.343.9—55.651.2—62.136.0—50.3　difference9.911.710.914.3　standarddeviation4.44.74.05.2　average60.350.256.442.6　relativestandarddeviation/%7.49.47.012.2nitriteaccumulation/%　range97.7—98.884.9—98.087.1—89.287.4—100.0　difference1.013.10.112.6　standarddeviation0.54.32.24.2　average98.189.590.595.9　relativestandarddeviation/%0.44.83.74.42　Table2　EffectoffluctuationofflowrateonstabilityofpartialnitrificationprocessItemSeriesⅠⅡⅢinfluentflowrate/L·d-1　range80.0—140.060.0—100.080.0—100.0　difference60.040.020.0　standarddeviation26.317.110.0　average102.582.590.0　relativestandarddeviation/%26.720.711.1ammoniuminfluentconcentration/mg·L-1536.2572.0606.0ammoniumeffluentconcentration/mg·L-1　range198.8—305.5205.5—327.9270.1—300.0　difference106.7122.429.2　standarddeviation46.950.515.0　average266.5260.6283.4　relativestandarddeviation/%17.619.45.3ammoniumremovalefficiency/%　range43.5—62.142.4—64.650.6—54.9　difference18.622.24.3　standarddeviation8.19.22.3　average50.454.453.2　relativestandarddeviation/%16.016.84.3nitriteaccumulate/%　range88.4—99.488.9—98.288.8—98.0　difference10.99.39.2　standarddeviation5.04.94.8　average93.693.194.1　relativestandardd