低温对中试AAOBAF双污泥脱氮除磷系统的影响张勇

2016,36(1)56~65ChinaEnvironmentalScienceAAOBAF,,,,,(,,,100124),(11~15)45m³/dAAO(BAF).,,AAO.AAOBAF,,TP14mg/L,P.,AAO.1116212732,6.7458.37813.21811.5139.726mgTP/(h·gMLSS);P1.6681.8922.4962.8352.976mgTP/(h·gMLSS),NO3N0.7861.1121.7612.6143.464mgNO3N/(h·gMLSS).X7031A10006923(2016)01005610Effectoflowtemperatureonpilot-scaleAAO-BAFtwo-sludgesystem.ZHANGYong,WANGShu-ying*,ZHAOWei-hua,SUNShi-hao,PENGYong-zhen,ZENGWei(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,EngineeringResearchCenterofBeijing,BeijingUniversityofTechnology,Beijing100124,China).ChinaEnvironmentalScience,2016,36(1)56~65AbstractTheinfluenceoflowtemperature(11~15)onatwo-sludgedenitrifyingandphosphorusremovalsystemwasstudiedinthisexperiment,thesystemisnamedAAO-biologicalaeratedfilter(BAF),whichtreatsabout45m³urbanwastewaterperday.Thenitrificationofthissystemrecoveredfromtheinhabitationoflowtemperatureinashorttime,however,thenitrificationofAAOsystemwhichisrunninginthesameconditionwiththeAAO-BAFsystemwasinhibitedbythelowtemperatureforalongtime.Theinhibitionoflowtemperatureonnitrificationleadstothedeclineofphosphorusuptakingintheanoxicphaseofthissystem,TPconcentrationintheeffluentofanoxicphaserisefrom1to4mg/L,however,itsaerobicphasecanuptakethesurplusphosphorus.TheretentiontimeofnitrifyingbacteriaisthemainreasonthatleadstothedifferenceofnitrificationbetweentheAAOandAAO-BAFaccordingtothebatchexperiments.At11,16,21,27,32,anaerobicphosphorusreleaserateofthesludgeintheAAO-BAFsystemwas6.745,8.378,13.218,11.513,9.726mgTP/(h·gMLSS)respectively;Thephosphorusremovalratesduringtheanoxicreactionwas1.668,1.892,2.496,2.835,2.976mgTP/(h·gMLSS)respectively,theNO3Nremovalratewas0.786,1.112,1.761,2.614,3.464mgNO3N/(h·gMLSS)respectively.Keywordstwo-sludgesystembiofilmdenitrifyingphosphorusremovallowtemperaturewastewaterhydrolysis,,.,[1].(DPAOs)AAOBAF[2].,,BAF,AAO.,30%50%[34],.20150522”863”(2012AA063406);*,,[e-mail]1AAOBAF57A2NSBR[5]AAOBCO[6]AAOBAF,AAOBAF,[79],14.2AAOBAF[10],,;.530,[11],20(20)maxTμμθ−=,θ,μ,20maxμ20,.,,,[12],(AOB)(NOB),10h[13].,,,NH4+N.,AAOBAF.AAOBAFBAF,,(MBBR),.MBBR,MBBR(SRT)[1415].,AAOBAF,MBBR,,,.,,.11~15AAOBAFCOD,AAO.,.,,AAOBAF.11.1AAOBCO2361451AAOBAFFig.1SchematicdiagramofthepilotscaleAAOBAFsystem45m³/dAAOBAF(1).AAO21m³,1:4:1,150%,200%,MLSS3000mg/L,SRT1520d,BAF7m³,HRT15.5h;BAF,70%,0.96kg/m³,95%,500m2/m3.AAODO12mg/L,BAFDO4mg/L.AAO,,(PAOs);,,;,P,;,BAF5836;BAFAAO,.AAO,15000m³/d,,300%100%,MLSS3000mg/L,SRT20~30d,HRT15h,1.54.59h.1.2AAOBAF,3.1232.5L;IKARCTbasicETSD;1ACO6603.1.2.1(1)21.AAOBAFAAOAAOBAF(12,65%)(biofilm1),50%12;AAO4L,(sludge1),344AAOBAF2L4NH4+N30mg/L.1121,θ,1311,2421,4~6mg/LDONH4+N.12MLSS700mg/L.,13,,11,4,2h,20d(biofilm2)(sludge2),.AAOBAFAAO(biofilm3)(sludge3),AAO.20d,biofilm2biofilm3sludge2sludge31121,NH4+N.34MLSS3000mg/L.Sludge2sludge3MLSS20803100mg/L,biofilm2biofilm3MLSS700mg/L.(Biofilm1)(Biofilm2)1120d11112121112120d(Biofilm3)211121111121(Sludge2)1120d20d(Sludge3)WWTP-AAO(:12)125687910341112AAOBAF(:12)(Sludge1)21Fig.2Schematicdiagramoftheprocessofexperiment11.2.2AAOBAF(2)2AAOBAF.1~551.8L(),51116212732,0.4L,60min.5MLSS2000mg/L.3,3.,30min.1.2.3AAOBAF3)3(a)AAOBAF,AAOPHB.1~551L1AAOBAF59,20mg/LP,BAF1L,NO3N10mg/L,51116212732120min.MLSS3300mg/L.3,3,.3(b)3(a),121L,BAF1L,,2NO3NTP10mg/L20mg/L,1732180min,NO3NTP.1.3,1.1Table1CharacteristicsofinfluentT()15.2~11.812.7pH7.2~7.67.4COD(mg/L)175.2~202.1184.08NH4+N(mg/L)39.14~47.8442.94NO2N(mg/L)0NO3N(mg/L)0C/N3.87~4.714.29PO43P(mg/L)3.88~8.414.411.40.45μmCODNH4+NNO2NNO3NPO43P.[16],VFAAgilent6890N,pHDOWTWpH/DO3420().MLSS,:BAF201052hM0,,2h,3,3M1,(M0M1)/20.50%n,2LMLSSn·(M0M1)/(20×2)mg/L.22.1AAOBAFAAONH4+N3,15,AAOBAFNH4+N;15NH4+N90%,12NH4+N65%,NH4+N15mg/L.20d,NH4+N,35d,NH4+N90%.AAO(WWTPAAO),;,AAONH4+N,.15,[1718],BAF,AAO,BAF,.3,15,.,,,.,,,,.,WWTPAAO,,603620~30d,AAOBAF,.,WWTPAAOP,,;,,AAO,.(mg/L)(d)567891011121314151617180102030405060708090100110120130(%)01020304050607080051015202530354045505560()NH4+-NAAO-BAFNH4+-NAAONH4+-NAAO-BAFNH4+-NAAONH4+-N3AAOBAFAAOFig.3ComparisonoflowtemperatureinfluenceontheNH4+NremovalbetweenAAOBAFandWWTPAAOsystem2.24,biofilm1110.081kgNH4+N/(kgMLSS·d),210.25kgNH4+N/(kgMLSS·d),θ1.12.sludge111210.0170.034kgNH4+N/(kgMLSS·d),biofilm12120dbiofilm21121biofilm12.331.25,1.05,,.20dsludge2,1121,sludge14.695.91,,,biofilm2.Sludge2biofilm1,biofilm1,15~1215.Sludge21.13,sludge11.10(2),.sludge2,,,sludge1,21.,NH4+N,,5,sludge1biofilm1,21,,.,.0.3120.1891121[kgNH4+-N/(kgMLSS⋅d)]0.0810.2500.0130.0340.2410.3880.0610.2010.0140.047biofilm1sludge1biofilm2sludge2biofilm3sludge30.00.10.20.30.441Fig.4Variationsofnitrificationrateinbatchexperiment121Table2NitrificationrateandTemperaturecoefficientofexperiment111[kgNH3N/(kgMLSS·d)]21[kgNH3N/(kgMLSS·d)]sludge10.0130.0341.10biofilm10.0810.2501.12sludge20.0610.2011.13biofilm20.1890.3121.05sludge30.0140.0471.13biofilm30.2410.3881.051AAOBAF61,,MLSS,sludge2,MLSS().,.,(AOB)305,AOB,,[18],.sludge3sludge2,,sludge3,AAO,.,,,,,,.biofilm3biofilm2,BAF,.,15mg/L.1016024ccuXt−−=××(1):u,kgNH4+N/(kgMLSS·d);c0c115mg/L;tc0c1;XMLSS.θ20(20)maxTμμθ−=,21