HRT对城市污水厂尾水反硝化深度脱氮的影响苑泉

28620156ResearchofEnvironmentalSciencesVol．28No．6Jun．2015．HRTJ．2015286987-993．YUANQuanWANGHaiyanLIUKaietal．EffectsofHRTondenitrificationforadvancednitrogenremovalofwastewatertreatmentplanteffluentJ．ResearchofEnvironmentalSciences201[e-mail]．*[e-mail]1212*123121241．1000122．1000123．4541504．056038ρTN．MBBRHRTMBBR．NO3－-NρTN80.8%±8.4%．HRT12、84hNO3－-N90%HRTHRT4hMBBR28.4±14.527.4±14.3mgL·dNO3－-N．HRTCODCr．、DOM．HRT8hMBBRDOMMBBR．MBBRHRT8h．MBBRX7031001-6929201506-0987-07ADOI10.13198j．issn．1001-6929．2015．06．21EffectsofHRTonDenitrificationforAdvancedNitrogenRemovalofWastewaterTreatmentPlantEffluentYUANQuan12WANGHaiyan12*LIUKai123HANGQianyu12ZHAOMeng1241．StateKeyLaboratoryofEnvironmentalCriteriaandRiskAssessmentChineseResearchAcademyofEnvironmentalSciencesBeijing100012China2．ResearchCenterforWaterPollutionControlTechnologyChineseResearchAcademyofEnvironmentalSciencesBeijing100012China3．HenanPolytechnicUniversityJiaozuo454150China4．SchoolofUrbanConstructionHebeiUniversityofEngineeringHandan056038ChinaAbstractHightotalnitrogencontentisanurgentissuewhenwastewatertreatmentplantWWTPeffluentisusedasawatersource．Basedonalong-terminvestigationofWWTPeffluentqualityMBBRwasselectedforadvanceddenitrificationofWWTPeffluentandtheinfluenceofHydraulicRetentionTimeHRTontheperformanceofMBBRfilledwithdifferentcarrierswasstudied．TheresultsshowedthatNO3－-NwasthepredominantnitrogenintheWWTPeffluentaccountingfor80.8%±8.4%．Intherangeof4to12hHRTslightlyaffectedtheNO3－-Nremovalratewhichwashigherthan90%．HoweverthedenitrificationrateincreasedconsiderablywithHRTdecreaseandthemaximumdenitrificationwhichwas28.4±14.5and27.4±14.3mgL·dinNO3－-NforMBBRfilledwithpolyethyleneandhaydaterespectivelyoccurredat4hHRT．ChemicalOxygenDemandCODCrremovalefficiencydecreasedwithHRTdecrease．Three-dimensionalfluorescencespectrashowedthatboththeinfluentandeffluentcontaineddissolvedorganicmatterDOMasfulvicacidandprotein-likesubstanceandthemaximumDOMremovaloccurredat8hHRT．OrganicpollutantsremovalefficiencyofMBBRfilledwithpolyethylenewasslightlyhigherthanthatfilledwithhaydate．Integrativelyconsideringthenitrogenandorganicpollutants28removalefficiency8hHRTwasoptimumforMBBRfilledwithpolyethyleneandhaydate．KeywordsWWTPeffluentdenitrificationMBBRhydraulicretentiontimeHRT．．0.1%．1．ρTNNO3－-N．NO3－-N．2．MBBR20803-5．．MBBR、、、6-7、8-9、3-410-15、16．MBBR17．MBBRlimitoftechnologyLOTρTN＜3mgLρTP＜0.18mgL3．MBBRρNO3－-NρNO3－-N560mgL、HRT10h15gm2·dNNO3－-N95%ρCODCr16．MBBR20℃、HRT0.92h、ρNO3－-N30mgLρNO3－-N4.6mgL4.6gm2·d17．22.1℃MBBRHRT30minρNO3－-N6.67mgL0.38mgL3．SjlundaKlagshamnMBBR12aHRT1.61.2h0.81.0gm2·d4．MBBRρSSHRTHRT5．HRT．HRT．ρTNMBBRHRTMBBRHRT．MBBRHRTMBBRMBBRHRT．11.1MBBR120mm500mm6.0L5.6L12．25mm10mm0.96～0.98kgL620m2m35mm10mm0.60～0.70kgL3.5～4.0m2g40%～44%2．1—2—3—MBBR4—5—6—．1MBBRFig.1TheMBBRdenitrificationprocessflowdiagram8896HRT1.23．25±1℃．2MBBRBT100-1L30%30rmin．2d125.5mgL1．1Table1InfluentqualitydHRThρCODCrmgLρTNmgLρNO3－-NmgLⅠ321261.8±18.85.9±2.43.0±1.0Ⅱ48861.2±16.67.3±3.04.7±2.3Ⅲ26454.6±9.69.4±3.04.9±2.43000ρMLSS7000mgLρMLVSS3549mgLρMLVSSρMLSS0.51SV66%、SVI94mLg．、NO3－-Nw=c1－c2×24HRT1wmgL·dc1ρNO3－-NmgLc21ρNO3－-NmgL．1.32d10.45μmρTN、ρNO2－-N、ρNO3－-NρDOMDOM．ρNH4+-NρTNTOC-VCPHTOCTNρTP-ρCODCrρNO2－-NρNO3－-NDOM．．22.1300d2．2ρNO3－-N、ρNO2－-N、ρTN10.0±3.7、1.0±0.6、12.2±3.8mgLρNO3－-NρTN80.9%±8.1%．18ρTN11～20mgLρNH4+-N0.56～2.71mgLNO3－-N．2Fig.2CompositionandcontentofnitrogeninWWTPeffluent3NO3－-N、NO2－-NNH4+-N．ρTN、ρNH4+-NρNO3－-NρNH4+-NρNO3－-NρTNρNO2－-N18．3Fig.3SeasonaldistributionofnitrogencompositionandcontentinWWTPeffluent．ρTN、ρNH4+-NρNO3－-N．NO3－-NNO2－-NN2NO3－-NNO2－-NρNO2－-N19．2.2HRTMBBR2.2.1NO3－-N989284Ⅰ、Ⅱ、ⅢMBBRρNO3－-N0.3、0.2、0.1mgLNO3－-N91.2%、91.3%、91.4%MBBRρNO3－-N0.8、0.5、0.3mgLNO3－-N83.9%、90.4%、91.1%．HRTMBBRNO3－-NHRTNO3－-N．HRT12、84hMBBRNO3－-N5.5、13.7、28.4mgL·dMBBR4.6、13.3、27.4mgL·dHRTHRT4h0.15gm2·d．MBBRMBBR．Welander17ρNO3－-N30mgL、15℃、HRT3.981.66hMBBRρNO3－-N0.4mgL0.71.4gm2·dHRT0.83hρNO3－-N2.8mgL2.7gm2·d．Welander17ρNO3－-NCN2021“”．4HRTMBBR、ρNO3－-NFig.4InfluentsandeffluentsNO3－-NconcentrationanditsdenitrificationcapacityofpolyethyleneandhayditeMBBRatdifferentHRTs2.2.22HRT12、84h、ρNH4+-NρNO2－-NTNNO3－-N．NH4+-NNO2－-N22NH+4+NO2→－N2+H2OTNHRTHRT12h4hTN56.5%71.1%HRT4hNO3－-NNH4+-N．2Table2TheremovalofotherformsofnitrogenHRThNH4+-NNO3－-NTNρmgLρmgL%ρmgLρmgL%ρmgLρmgL%122.9±3.12.0±2.827.9±42.11.5±0.41.2±0.315.9±26.86.3±2.42.4±1.161.1±8.381.6±1.11.2±1.020.4±36.51.8±0.71.3±0.316.9±28.48.3±2.82.9±1.563.6±14.842.9±3.12.2±2.930.9±48.91.8±0.41.3±0.322.5±20.18.5±2.22.4±0.871.1±9.5122.9±3.12.3±3.526.6±38.61.5±0.41.3±0.410.8±38.76.3±2.42.7±1.256.5±12.181.6±1.11.1±1.026.3±45.31.8±0.71.3±0.317.0±25.78.3±2.82.9±1.763.8±15.242.9±3.11.8±2.647.5±30.31.8±0.41.3±0.421.9±26.78.5±2.22.4±0.571.1±5.90996HRT23MBBRTNNH4+-N、NO3－-NNO2－-NNO3－-NNO2－-NHRT．212h．24．4hHRTNO3－-N．Calderón10HRTMBBRHRTNO3－-N．2.3HRT2.3.1CODCrHRT12、84hCODCr124.5、160.5308.8mgL·dMBBRρCODCr28.9、32.7、33.2mgLMBBR29.9、31.9、35.6mgLMBBRCODCr49.0%