多点进水多级AO工艺脱氮及颤蚓生长特性李军

3811201211JOURNALOFBEIJINGUNIVERSITYOFTECHNOLOGYVol．38No．11Nov．2012A/O11111221．1001242．450052－A/O．120dCOD84%100%TN70%～80%3GB18918—2002A．DO．．－AOSVIX703A0254－0037201211－1738－0007CharacteristicsofNitrogenRemovalandTubificidaeGrowthintheStepFeeding-MultistageA/OProcessLIJun1LIZe-bing1KONGQian1JIANGMing1ZHAOBai-hang1MAJia-xuan2WANGXiao-yi21．CollegeofCivilEngineeringandArchitectureBeijingUniversityofTechnologyBeijing100124China2．HenanChemicalIndustryResearchInstituteCo．LtdZhengzhou450052ChinaAbstractTakingmunicipalwastewaterastreatmentobjectastepfeeding-multistageA/Oprocessfornitrogenremovalwasconducted．FurthermoretheaimofthispaperwastoresearchgrowthcharacteristicofTubificidaeanditsaffectiontonitrogenremovalandsludgecharactenstics．After120daysoperationagoodperformancewasachievedinthesystem．TheCOD、NH+4-NandTNremovalefficiencywas84%、100%and70%－80%respectively．ThreeaboveindexescouldmeetStandardAofLevel1in“DischargeStandardofPollutantsforMunicipalWastewater”GB18918—2002．ItwasfoundthatlowDOconcentrationwasunfitfortubificidaegrowthandthematureTubificidaerequiredmorefacultativespacethanthelarvaesinthelong-timeoperatingprocess．Tubificidaegrowthdidn’taffecttheremovalabilityofthesystem．Anditcouldincreasethesludgesedimentationperformanceandpromotedsludgereductioninacertaindegree．Keywordsstepfeeding-multistageA/OprocessTubificidaenitrificationanddenitrificationsludgevolumeindexSVI2011-03-31．510780082009ZX07210－002－003．28092007KZ201110005008．1964—[e-mail]．A/O、A2O1．11A/O．A/O、．A/O．A/O1L75%A/O2∶3∶3∶2A/OρMLSS3500mg/L35004700mgA/OA/O34%．．A/O．、．11.1．1#L×B×H=0.8m×0.5m×0.5m2#L×B×H=0.8m×0.5m×0.5m360L24L×B×H=0.2m×0.15m×0.5m624．1120r/min1.6m3/h．．0.5m45°1m60L、．1．1Fig．1Schematicdiagramofprocess1.2．pH7～81．．1Table1Characteristicofwastewatermg·L－1ρNH+4-NρTNρCODρTPρNO－3-NρNO－2-N35～5540～60300～5004～80～20～21.3COD、TN、NH+4-N、NO－3-N、NO－2-N、TP、MLSS2．CODMLSS．937120121.43．1130d．HRT10h2∶3∶3∶275%11～15℃．4500mg/L．2230d．HRT1～1020h11～2015h20～3010h2∶3∶3∶275%25±2℃．．3360d．HRT10h75%20～30℃．SRT30d1/d．．22.12.1.1COD－A/OCOD2ρCOD329mg/LρCOD45mg/L84%90%GB18918—2002AρCOD＜50mg/L．2CODFig．2CODremovalinprocess2.1.2TPTP3．TP60%80%．25±2℃HRT20h．ρNH+4-N1mg/L．10mg/L3-4TP50%～60%．3TPFig．3TPremovalinprocessNH+4-N、TN4．4a1NH+4-NNH+4-N50%．2HRT20h25±2℃NH+4-N100%．HRT15h10h100%．4bNO－3-N23ρNO－3-N13.8mg/L．1．HRT．4d3．NH+4-N．．4c2、3TN70%～80%ρTN047111A/O4Fig．4Nitrogenremovalinreactorandvariationsduringprocess15mg/L90%GB18918—2002AρTN＜15mg/L．2.2A/O3A/O、．．Rensink50.500.40657%Huang7CAS1．．A/O3．43TN．．4L0.25L．2345d46～6056．2.2.11．DOρDOρDO4ρDO44ρDO．147120125Fig．5GrowthcharacteristicofTubificidaeinfixedbulkcarrier26Fig．6GrowthcharacteristicofTubificidaeinfixeddecentralizedcarrier42Table2DistributioncharacteristicofTubificidae/g·－1/g·－1O111O12O1313.412.5O1415.213.6O212O228.610.2O239.110.6O249.311.1O313O325.25.7O334.85.1O344.24.6O412.83.74O423.53.4O433.63.1O442.22.5247111A/O．5644O41、O42、O43、O44．7O43O42．25、6721DO．DO8ρDO2．ρDO＜0.2mg/LO11、O12、O13ρDO＜0.5mg/LO14、O21、O22、O31、O41．ρDO＜0.5mg/LO11、O12、O13、O14、O21、O22、O31、O41．DO．7Fig．7Tubificidaeinthebottomofdeadsludge2．25、DO．、．7O43、O4490%＞5cm＞0.8mm．．2.2.229-105-71SVI．SVISVI50～120mL/g．3A/OSVI8SVISVI54mL/g2．SRT30d1/d12L．0.5～0.720.5．8360～120、0.48、0.4、0.452．．83SVIFig．8SVIandsludgeyieldinsystemofthethirdstage31A/OCOD84%100%TN70%～80%3GB18918—2002A．22DOρDOρDO．3SVISVI54mL/g347120120.45．1．J．2003132-36．2．M．4．2002276-279．3SEVIOURRJMINOTONUKIM．ThemicrobiologyofbiologicalphosphorusremovalinactivatedsludgesystemsJ．FEMSMicrobiologyReviews20032799-127．4Metcalf＆EddyInc．WastewaterengineertreatmentandreuseM．4thed．NewYorkMcGraw-Hil2003581-582．5RENSINKJHCORSTANJERvanderPALJH．AnewapproachtosludgereductionbymetazoaC∥10thEuropeanSewageandReuseSymposium．MunchenIFAT1996339-364．6．J．2005256803-808．WEIYuan-songLIUJun-xin．EffectsofoligochaetereactorontreatingthedischargedexcesssludgeJ．ActaScientiaeCircumstantiae2005256803-808．inChinese7HUANGXLIANGPQIANY．ExcesssludgereductioninducedbyTubifextubifexinarecycledsludgereactorJ．JBiotechno2007127443-451．8．J．2011311803-808．NIEXiao-baoWUShu-juanWUFang-tongetal．EffectsofthebioturbationactivityofTubifextubifexonnitrogenreleasefromsedimentsJ．ActaScientiaeCircumstantiae2011311107-113．inChinese9．J．20082861141-1148．ZHUHuiWEIYuan-songYANGYuetal．FactorsaffectingsludgevolumereductioninducedbyTubificidaeJ．ActaScientiaeCircumstantiae20082861141-1148．inChinese10．J．2008285910-915．ZHUHuiWEIYuan-songWANGYa-weietal．EffectofTubificidaeonactivatedsludgesettlingperformanceJ．ActaScientiaeCircumstantiae2008285910-915．inChinese4471