AO除磷系统中不同CN引起的污泥膨胀及恢复研究杨红娟

A/OC/N杨红娟1,袁林江1,胡　坤2(1.,　710055;2.,　710302)　:采用A/O除磷系统处理人工模拟污水,保持进水COD浓度为400mg/L,研究不同NH4+-N浓度下系统污泥形态的变化、沉降性能和胞外聚合物(EPS)的变化以及对COD和P的去除率的影响。结果表明,C/N依次变为100/1.25,100/3,100/5时,系统污泥分别发生了非丝状菌膨胀(黏性膨胀)、丝状膨胀、恢复正常等3个过程,其中恢复正常时污泥的形态最为密实,除磷率也相对较高,而EPS和蛋白质含量最低。:非丝状膨胀　丝状膨胀　A/O除磷　C/N:X703.1　　:A　　:1674-0254(2010)02-0018-05SludgeBulkingandRecoveryResearchunderDifferentValuesofC/NinA/OPhosphorusRemovalSystemsYANGHongjuan1,YUANLinjiang1,HUKun2(1.SchoolofEnvironmentEngineeringCityPlanning,Xi'anUniversityofArchitectureandTechnology,Xi'an710055,China;2.GovernmentofShijingTowninHuCounty,HuCounty710302,China)Abstract:Themorphologicalchangesofthesludge,variationsofsedimentationpropertiesandextra-cellularpolymericsubstances(EPS)werestudiedinsomeexperimentsatdifferentconcentrationsofammonianitrogeninA/Ophosphorusremovalsystemfedwithartificialwastewater.ThechangesoftheremovalrateofCODandPwerealsodiscussed.TheresultsshowedthatwhenthevalueofC/Nbecame100/1.25,100/3,100/5,thesludgehasexperiencedthreephases,includingnon-filamentousbulking(viscoussludgebulking),filamentousbulkingandrecoverytonormal,respec-tively.Attherecoverytonormalphase,theformofsludgewasdensest,andthephosphorusremovalratewasrelativelyhigh,whiletheEPSandtheproteincontentwerethelowest.Keywords:viscoussludgebulking,filamentousbulking,A/Ophosphorusremoval,C/N　　,(BNRAS),BNRAS,(CAS),,BNRAS[1]。,BNRAS,[2,3]。(BNR)N、P。,CASBNRAS,,:2009-10-12;2009-10-15:,,1983,,,:。E-mail:[e-mail]·18·　　20102　　　Vol.16　No.2　　A/OC/N。1　1.1　A/O,(1),40cm,10cm,3L,9L,3.8L,1.5h。2L/h,24h,50%,。1　A/O1.2　,MLSS6.0～7.0g/L,6L。,:120mg/L,120mg/L,180mg/L,19.23～76.92mg/L,43.6mg/L,50mg/L,10mg/L,1。:FeCl3·6H2O:14.996g/L,KI:1.8g/L,H3BO3:1.5g/L,MnSO4·H2O:1.512g/L,CoCl2·6H2O:1.407g/L,(NH4)6MO7O24·4H2O():3.064g/L,CuSO4·5H2O:0.30g/L,ZnSO4·7H2O:1.2g/L。1　COD/(mg/L)NH4+-N/(mg/L)PO43-P/(mg/L)pH4005～20106.1～8.11.3　,2。2　NH4+-N/(mg/L)51220　　(SV)、(SVI)、(MLSS)、(COD)、NH4+-N、PO43-,[4]。EPS[5],[6],Folin-[7],EPS[8],EPSIL500TOC.、,SS。2　2.1　C/NCOD400mg/L,5、12、20mg/L,C/N100/1.25、100/3、100/5。C/N100/1.25100/3,,,,2a、d。,,,,[9],(),SVI400mL/g(3)。12mg/L,C/N100/3,15,,SVI943mL/g(3),,2b、e。ShederRE,,、,,[10]。、PHB,,(Sphaerotilusnatans)。,Sphaero-tilusnatansPHB,A/O,。2c、f20mg/L,,,,,·19·　　20102,:A/OC/N2　3　,SVI100mL/g。2.2　C/NCODPC/N100/1.25,100/3,100/5,4,COD80%,,,,,,。P,C/N100/1.25,15%,,24.9%,C/N100/5,,32%,,,,,。PHB(5),,·20·　　20102　　　Vol.16　No.2　　4　CODPPHB,,,,。5　PHB(1000)2.3　(EPS)EPS,、[11]。,EPS,。、EPS6。EPS,(MLSS)355.28mg/g210.53mg/g,,,,,EPS,,EPS,(MLSS)259.85mg/g。EPS,ForsterCF[12]。、、SVI127、416、734mL/g,EPS(MLSS)25.41、28.95、47.90mg/g,,SVI,Liao[13],。EPS,。3　(1)A/O,C/N100/1.25,,C/N100/3,,,C/N100/5·21·　　20102,:A/OC/N6　EPS,,SVI100mL/g。(2)A/O,,,,,。(3)A/O,EPS,EPS;,SVI;,EPS。　　　[1]EiklboomDH,AndreadakisA,AndreasenK.Surveyoffila-mentouspopulationsinnutrientremovalplantinfourEuro-peancountries[J].WatSciTech,1998,37(4/5):281-289.[2]HoranNJ,ShanmuganP.Effectsofstarvationandnutrientdepletiononthesettlingpropertiesofactivatedsludge[J].WatRes,1986,20(5):661-666.[3]NovákL,LarreaL,WannerJ,etal.Nonfilamentousactivatedsludgebulkingcausedbyzoogloez[J].WatRes,1993,27(8):1339-1346.[4].[M].4.:,2002:210-280.[5],,.[J].,2006,29(3):46-53.[6],[M].:,1994:85-90.[7]DuboisM,GillesKA,HamiltonJK,etal.Colorimetricmethodfordeterminationofsugarsandrelatedsubstances[J].AnalChem,1956,28:350-356.[8],,,.EPS[J]..2008,28(9):1758-1762.[9],,,.[J].,2001,22(6):61-65.[10],.[J].,2007,29(2):11-13.[11],,,.-(EPS)[J].,2005,25(12):1624-1629.[12]ForsterCF,DallasNewtonJ.Activedsludgeonsettle-mentsomesuppositionsandsuggestion[J].WatPollutControl,1980,79(3):338-351.[13]LiaoBQ,AllenDG,DroppoIG,etal.Surfacepro-pertiesofsludgeandtheirroleinbioflocculationandsettleability[J].WaterResearch,2001,35:339-350.·22·　　20102　　　Vol.16　No.2