干法腈纶废水在限氧SBR反应器中的部分亚硝化李长波

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SBR李长波,赵国峥,邱峰(辽宁石油化工大学环境与生物工程学院,辽宁抚顺113001)以经生物流化床处理后的腈纶废水为原水,在限氧SBR反应器中研究了适合ANA-MMOX工艺进水的部分亚硝化预处理技术。控制SBR的主要参数如下:DO为0.30~0.40mg/L、pH值为7.2~7.6、温度为30~35℃、曝气时间为10h,经过27d的连续运行,成功实现了部分亚硝化系统的快速启动。同时考察了启动过程中影响亚硝酸盐氮积累的主要因素。结果表明,低DO浓度是实现部分亚硝化的决定性因素;pH值不仅会通过对游离氨浓度的影响而引起氨氧化菌(AOB)活性的变化,其本身也会对AOB活性直接产生一定影响;适当提高系统温度可增强AOB的竞争能力,但当温度>35℃时会对AOB活性产生抑制。部分亚硝化系统的最优运行参数如下:DO为0.35mg/L、pH值为7.6、水温为32℃,在此条件下稳定运行后,平均亚硝化率可达到95%以上,出水COD和TN浓度略有下降。经适用性试验验证,腈纶废水部分亚硝化系统出水完全可以作为ANAMMOX工艺的进水。腈纶废水;限氧条件;SBR反应器;部分亚硝化;厌氧氨氧化X703C1000-4602201409-0125-052012ZX07202-002、2013ZX07202010FSSH11B507PartialNitrificationofDry-spunAcrylicFiberWastewaterinSBRunderLimitedOxygenConditionLIChang-boZHAOGuo-zhengQIUFengSchoolofEnvironmentalandBiologicalEngineeringLiaoningShihuaUniversityFushun113001ChinaAbstractPartialnitrificationwasresearchedinSBRunderlimitedoxygenconditiontoproducethecorrectinfluentfortheANAMMOXprocesswhichwasfedwitheffluentofbiologicalfluidizedbedforacrylicfiberwastewater.ThemainparametersofthereactorwerecontrolledasfollowsDOwas0.30to0.40mg/LpHvaluewaskeptfrom7.2to7.6temperaturewasmaintainedat30to35℃andaera-tiontimewas10h.Rapidstart-upforthepartialnitrificationsystemwasachievedafter27d.Atthesametimethefactorsimpactingtheaccumulationofnitriteintherapidstart-upprocesswereinvestiga-ted.TheresultsindicatedthatlowconcentrationofDOwasoneofthedecisivefactorsforpartialnitrifica-tion.ThechangeofAOBactivitywascausedbypHvaluenotonlythroughaffectingfreeammoniacon-centrationbutalsoacertainimpactfromitself.Whenthesystemtemperaturewasincreasedappropriate-lythecompetitivenessofAOBimproved.Howeverwhentemperaturewasmorethan35℃AOBactiv-itywouldbeinhibited.UndertheoptimumparametersDO0.35mg/LpH7.6temperature32℃·521·第30卷第9期2014年5月中国给水排水CHINAWATER&WASTEWATERVol.30No.9May2014theaveragenitrosationratereachedmorethan95%theconcentrationsofCODandTNineffluentde-creasedslightly.ApplicabilityresultverifiedthatitwasabsolutelypossibletoprovidecorrectinfluentfortheANAMMOXprocessthroughthepartialnitrificationofacrylicfiberwastewaterinSBRunderthelimit-edoxygencondition.KeywordsacrylicfiberwastewaterlimitedoxygenconditionSBRpartialnitrificationANAMMOX、。、1。、。ANAMMOXANAMMOX1∶1。23。SBRAN-AMMOXDO、pH、SBR、/。1材料与方法1.1COD、BOD、、、272~348、22~29、116~181、<1、6~11mg/LpH7.2~7.9。MLSS10.38g/L。1.21SBR15L12L4。SBR5min、、1h、5min4/5。1Fig.1Schematicdiagramofpartialnitrificationreactor1.3CODDO—pH。2结果与讨论2.1SBR1L。30~35℃、DO0.30~0.40mg/L、116~181mg/L、pH7.2~7.610h。2·621·第30卷第9期中国给水排水.watergasheat.com3“”、。2Fig.2Variationofnitrogenconcentrationduringstartupstage3Fig.3Variationofnitrosationrateandammonianitrogenremovalrateduringstartupstage2、3SBR。AOB34%。101680%。SBR①FAAOBNOBNOBAOB②AOBDONOBAOBDONOBDO。DOAOBNOBSBR37%~59%。264327d90%AOB4。27dSBR。2.22.2.1DOAOB。DOAOBNOBDO4~6。43DODO4。10h。4DOFig.4EffectofDOconcentrationonnitrosationrateandammonianitrogenremovalrate444~52DO0.30~0.40mg/L0.34mg/L90%98.3%46.4%53~62DO0.61~0.74mg/L0.68mg/L84%62.7%63~72DO0.90~1.05mg/L0.97mg/L75%70.·721·.watergasheat.com李长波,等:干法腈纶废水在限氧SBR反应器中的部分亚硝化第30卷第9期9%73~82DO1.22~1.36mg/L1.29mg/L70%DONOB。DONO-2-NNH+4-N1∶1DONOB。2.2.2pHpHAOBpH7pHAOBAOB8。5pH。5pHFig.5EffectsofpHonfreeammoniaconcentrationandammoniaoxidationrate5pH。pH<7.0pH7.0~7.6pH7.6~8.0pHAOB。pHAOBpHpHAOB。2.2.3AOBNOB。912~14℃30℃15~30℃。AOBNOB。6。6Fig.6Effectsoftemperatureonnitrosationrateandammoniaoxidationrate6<16℃86.5%16~30℃32℃98.7%AOB36℃。Gali10SHARON。2.3SBRDO0.35mg/L、pH7.6、32℃10hNH+4-N、NO-2-N、NO-3-N、TN、COD157.4、0.71、7.39、198.6、319.6mg/L62.9、76.3、9.04、183.9、290.5mg/L。95%·821·第30卷第9期中国给水排水.watergasheat.comCODTN。SBRANAMMOXANAMMOX1L、、。ANAMMOXN2NH+4-NNO-2-N1∶1pHANAMMOX。SBRANAM-MOX。3结论①30~35℃SBRDONOBAOB27d90%NO-2-NNH+4-N1∶1。②DODOpHpHAOBpHAOBAOB>35℃AOB。③DO0.35mg/L、pH7.6、32℃95%CODTN。ANAMMOX。1.J.20123393172-3176.2GutLPlazaETrelaJetal.Combinedpartialnitritati-on/AnammoxsystemfortreatmentofdigestersupernatantJ.WaterSciTechnol20065312149-159.3ChuangHPOhashiAImachiH.Effectivepartialnitri-ficationtonitritebydown-flowhangingspongereactorunderlimitedoxygenconditionJ.WaterRes2007412295-302.4.SBRJ.2009322134-137.5TokutomiT.Operationofanitrite-typeairliftreactoratlowDOconcentrationJ.WaterSciTechnol2004495/681-88.6.J.200218629-31.7.M.2004.8.SBRJ.20113261653-1659.9.—J.200016229-31.10GaliADostaJvanLoosdrechtMCMetal.Twowaystoachieveananammoxinfluentfromrealrejectwatertreatmentatlab-scalePartialSBRnitrificationandSHARONprocessJ.ProcessBiochem2007424715-720.1982-。E-maillnpulcb@126.com2013-11-01·921·.watergasheat.com李长波,等:干法腈纶废水在限氧SBR反应器中的部分亚硝化第30卷第9期

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