化学除磷辅助A2O工艺处理城市污水脱氮

A2/O*122331.4536002.4500023.450001A2/OCOD/TN。、、pH10.00MMg2+/MNH+4/MPO3－41.5∶1.5∶1。TNTP10%TNTPGB18918—2002《》A。A2/ODOI10.13205/j．hjgc．201403008STUDYONDENITＲIFICATIONANDDEPHOSPHOＲIZATIONOFMUNICIPALWASTEWATEＲBYCHEMICALPＲECIPITATIONASSISTEDA2/OPＲOCESSHuMeng1CaoJun2ZhangYan2YuJie3XingChuanhong31.HuixianEnvironmentalProtectionBureauHuixian453600China2.ZhengzhouSewagePurificationCo．LtdZhengzhou450002China3.SchoolofWaterConservancy＆EnvironmentalEngineeringZhengzhouUniversityZhengzhou450001ChinaAbstractTosolveconflictneedsforcarbonsourceinbio-denitrificationandbio-dephosphorizationchemicalprecipitationassistedA2/Oprocesswasemployedtoachievesimultaneousremovalofnitrogenandphosphorusthroughregulatingsideflowratioattheanaerobictank．Batchtestresultsindicatedthatamongselectedaluminumsaltsferricsaltcalciumsaltandmagnesiumsaltmagnesiumchloridewasthemostsuitablechemicalagentforphosphorusprecipitation．TheoptimumpHwas10.00whiletheoptimumratioofMg2+∶NH+4∶PO3－4was1.5∶1.5∶1．Comprehensiveconsiderationassideflowratioof10%theconcentrationofTNandTPintheeffluentcouldmeettheLevelAGrade1of“DischargeStandardofPollutantsforMunicipalWastewaterTreatment”GB18918—2002．KeywordschemicalprecipitationA2/Oprocessbio-denitrificationbio-dephosphorizationsideflowratio*2009ZX07210-001-001。2013－07－01A2/O12A2/O3。TPGB18918—2002《》AP0.5mg/L4。5-6A2/OA2/O。7。8、、。992WaterPollutionControl。COD/TNTNTP。11.110×104m3/d＞2.65＞0.2mm。MLVSS/MLSS≈0.75。1.21。1Fig．1Schematicoftheexperimentalsetup。。。0.5mg/L。22.1ρTP2.99～9.10mg/LpH6.7～7.5。、、、。61L200r/min1min50r/min20min30minTPpH。2.1.1ρTP5.22.99mg/LpH7.30、7.4740～140mg/L2。2TP120140mg/LTPTP。TPTP。100mg/LρTP0.8mg/L86.2%。2TPFig．2TherelationshipofdosageofaluminumsaltswithTPremovals2.1.2TP3ρTP3.2mg/LpH7.09TPTP140mg/LρTP0.9mg/L71.9%。2.1.3ρTP6.7mg/LpH7.17200～1200mg/LTP4400mg/LρTP3.0mg/LTPpH03EnvironmentalEngineering3TPFig．3TherelationshipofdosageofFeCl3withTPremovals4pH1200mg/LpH11.74。4TPFig．4TherelationshipofdosageofCaOH2withTPremovals2.1.4、。Mg2+Mg、NH+4NPO3－4PKspMg2++NH+4+PO3－4+6H2O→MgNH4PO4·6H2O。2.5×10－13。pHpH。Mg2+Mg、PO3－4PMg2+Mg/PO43－P10。、、pH、Mg/P、、。ρTP9.1mg/LpH7.48MMg2+/MNH+4/MPO3－4=1∶1∶1pH=7～11pHTP5。5pH10.0ρTP＜3.9mg/LTP57.14%。pH10.0。5pHTPFig．5TherelationshipofpHwithTPremovalsMg2+/NH+4/PO3－46ρTP13.1mg/LpH7.12pH=10.00。MMg2+/MNH+4/MPO3－4TPMg2+/NH+4/PO3－4MMg2+/MNH+4/MPO3－41.5∶1.5∶1。TP。100mg/Lmg0.044mgTPTP86.2%。140mg/Lmg0.016mgTP71.9%。400mg/Lmg0.012mgTP55.2%。pH10.00MMg2+/MNH+4/MPO3－41.5∶1.5∶1mg0.22mgTP。。2.2A2/O111mg/LTN5mg/LCOD1mg/LTP25mg/LCOD1mg/LTPCOD1mg/LTNCOD5。13WaterPollutionControl6Mg2+/NH+4/PO3－4Fig．6EffectofMg2+/NH+4/PO3－4onphosphorusrecoveryTPCOD。MgCl2NaOHpH。2～3mg/L＜0.5mg/L200%100%。COD/TN。0%、5%、10%、20%、30%7。ρTP3.3～11mg/L。70%TPGB18918—2002B。5%、10%20%ρTP＜0.5mg/LGB18918—2002A。5%30%TP10%99.5%TP30%TP82%TPGB18918—2002A。7Fig．7EffectofsideflowratiosonTN＆TPremovals12。TNρTN26～67mg/L。70%TNGB18918—2002B。5%、10%、20%30%GB18918—2002ATN。COD/TN。10%TP99.5%TN70%TP、TNGB18918—2002A。A2/OCOD/TN。10%TNTPGB18918—2002A。3A2/OCOD/TNCOD/TN/TP。23EnvironmentalEngineering1TP。100mg/Lmg0.044mgTP86.2%。140mg/Lmg0.016mgTP71.9%。400mg/Lmg0.012mgTP55.2%。pH10.00MMg2+/MNH+4/MPO3－41.5∶1.5∶1mg0.22mgTP。。25%30%TP10%99.5%TP30%TP82%TPGB18918—2002A。TN15mg/LGB18918—2002ATN。TNTP10%TP99.5%TN70%。3A2/OCOD/TN。。1．A2/OD．2012.2．A/O/ASBＲD．2011.3．/J．200525443-45.4．J．2009470-72.5．D．2010.6．J．2008114-18.7．J．201036536-37.8．D．2005.9．J．201023474-76.10．J．200523378-50.11．－M．2006101.12．M．200568-69.1969－。1969－。櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅[e-mail]2831、、5。UASB。2COD130～561mg/L253mg/L。3。451dUASBUASB3～6。AscensionalVelocity。1．UASBD．2009．2．UASBJ．2006321161-65．3．UASBJ．201238480-83．4．UASB-BCOJ．200935222-23．5．UASBJ．200624589-91．1987－。[e-mail]33WaterPollutionControl