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当前位置:首页 > 商业/管理/HR > 企业文化 > MAP结晶法与絮凝剂联用预处理化工含磷废水朱四琛
1,2,3,4(1.,211800;2.,210006;3.,210008;4.,223001):(51508268);(BK20150951);(2016M591835),。[1]。,。、。,(MAP,MgNH4PO4·6H2O,):,(MAP)。,pH、、PAFC、PAM。,MAP:pH9.0,n(Mg2+)∶n(PO43-)1.6∶1,30℃;:PAFC30mg/L,PAM3mg/L。TP、TN、NH3-N、CODCr98%、74%、64%、87%,。:;;;;:X78.031:A:1009-2455(2017)04-0011-05PretreatmentofchemicalphosphoruswastewaterbycombinationofMPAcrystallizationprocessandflocculantZHUSi-chen1,ZHOUJing-wu2,JINGGuo-yong3,WANGHai-quan4(1.CollegeofUrbanConstruction,NanjingUniversityofTechnology,Nanjing211800,China;2.NanjingWaterPlanningandDesigningInstituteCo.,Ltd.,Nanjing210006,China;3.TheITElectronicsEleventhDesignandResearchInstituteScientificandTechnologicalEngineeringCorporationLimited,Nanjing210008,China;4.Huai′anWaterCo.,Ltd.,Huai′an223001,China)Abstract:ChemicalhighphosphoruswastewaterwaspretreatedbycombinationofMPAcrystallizationpro-cessandflocculantsoastomeetthequalityrequirementofsubsequentbiochemicaltreatmentunit.Takingchemicalphosphoruswastewaterastheresearchobject,theinfluenceofpHvalue,magnesiumsaltdosage,reactiontem-perature,PAFCandPAMdosageonphosphorusremovalwereinvestigated.Theresultsshowedthat,theoptimalconditionforMPAcrystallizationprocessremovingphosphoruswasasfollows:thepHvaluewas9.0,then(Mg2+)∶n(PO43-)valuewas1.6∶1,thereactiontemperaturewas30℃.Undertheoptimalconditionforflocculantremov-ingphosphorus(thedosageofPAFCandPAMwere30and3mg/Lrespectively),theremovalratesofTP,TN,NH3-NandCODCrwere98%,74%,64%and87%respectively,whichmettherequirementofsubsequentunit.Keywords:flocculationprocess;magnesiumammoniumphosphate;crystallization;phosphorusremoval;flocculantMAP!!!!!!!!!!!!!!!!!!!!!!!!INDUSTRIALWATER&WASTEWATERVol.48No.4Aug.,2017·11·INDUSTRIALWATER&WASTEWATERVol.48No.4Aug.,20171Tab.1CharacteristicsofthesamplewaterpHρ(CODCr)/(mg·L-1)ρ(NH3-N)/(mg·L-1)ρ(TP)/(mg·L-1)ρ(TN)/(mg·L-1)3.7130093.479.2130 1pHFig.1InfluenceofpHvalueonphosphorusremoval89101112pH/%806040200NH3-NTNTPCODCr[2],。,。,,。MAP,,MAP,。MAP,MAP。11.1MgCl2·6H2O、NH4Cl、NaOH、H2SO4,;(PAFC)(PAM)。1.2,MAP。1。1.3MAP,PO43-,NH4ClMgCl2·6H2O、,NaOH。(1)MAP。500mL,。pH、n(Mg2+)n(PO43-)、,。10min,TP、TN、CODCr、NH3-N,TP、TN、CODCr、NH3-N。(2)。MAP,PAFC、PAMPAFC+PAM,。210r/min2min,70r/min15min。15min,TP、TN、CODCr、NH3-N,TP、TN、CODCr、NH3-N。1.4CODCrHACH-DRB200CODHACH-DR1010COD;TP、TN、NH3-NUV-5000;pHpH400pH。22.1pHpH1。MAP[2],。pH,PO43-、NH4+MgNH4PO4·6H2O,[3-5]。NH4++Mg2++PO43-+6H2O→MgNH4PO4·6H2O↓pH9.0,TP75%,TN、NH3-N、CODCr27%、30%、48%。pH8.0~9.0,MAPpH,;pH9.0~12.0,MAP,pHMAP[6],,。,pH9.0。2.2Mg2+pH9.0,25℃,1mol/LMgCl2,n(Mg2+)∶n(PO43-)1.0∶1、1.2∶1、1.4∶1、1.6∶1、1.8∶1、2.0∶1。Mg2+2。n(Mg2+)∶n(PO43-),TP。1.0∶1~1.6∶1,TP,,TP,TN、NH3-N、CODCr·12· ,,,:MAP2Mg2+Fig.2InfluenceofMg2+dosageonphosphorusremoval1.0∶11.2∶11.4∶11.6∶11.8∶12.0∶1n(Mg2+)∶n(PO43-)/%100806040200NH3-NTNTPCODCr3Fig.3Influenceoftemperatureonphosphorusremoval2030405060/℃/%NH3-NTNTPCODCr1008060402004PAFCFig.4InfluenceofPAFCdosageonphosphorusremoval102030405060/(mg·L-1)/%NH3-NTNTPCODCr100806040200。n(Mg2+)∶n(PO43-)1.6∶1,TP、TN、NH3-N、CODCr86%、44%、42%、64%。,TP,。,n(Mg2+)∶n(PO43-)1.6∶1。2.3pH9.0,n(Mg2+)∶n(PO43-)1.6∶1,20、30、40、50、60℃。3。3,MAP。20~30℃,,MAP,TP。20℃30℃,TP81%94%,TN、NH3-N、CODCr54%、48%、75%。30~50℃,TP。MAP。,MAP,,MAP[6-7]。,NH4+,,NH3-N[8]。30℃MAP。2.42.4.1PAFCMAP,-MAP[9]。pH9.0,n(Mg2+)∶n(PO43-)1.6∶1,30℃。10min,10、20、30、40、50、60mg/LPAFC。PAFC4。4,PAFCTP,。PAFC10mg/L30mg/L,TP、TN、NH3-N、CODCr。PAFC30mg/L,TP、TN、NH3-N、CODCr94%、67%、57%、83%,,。,TP,,,PAFC。,,。,PAFC30mg/L。2.4.2PAMPAM,,,,。PAM,[10-11]。,10min,1、2、·13·INDUSTRIALWATER&WASTEWATERVol.48No.4Aug.,2017 5PAMFig.5InfluenceofPAMdosageonphosphorusremoval123456/(mg·L-1)/%NH3-NTNTPCODCr100806040200 6PAFCPAMFig.6InfluenceofPAFCandPAMdosageonphosphorusremoval123456/(mg·L-1)/%NH3-NTNTPCODCr1008060402007Fig.7Microscopepictureofflocculationproduct(c)PAFCPAM(b)PAM(a)PAFC3、4、5、6mg/LPAM。PAM5。5,,PAM,PAM1~3mg/L,TPPAM;PAM3mg/L,TP95%,TN、NH3-N、CODCr63%、58%、67%。PAM,,PAM6mg/L,TP、TN、NH3-N、CODCr74%、48%、42%、16%,CODCr,PAM,,。PAFC,,,,。,PAM3mg/L。2.4.3PAFC+PAMMAPPAFC,TP、TN、NH3-NCODCr,,,、,,[11-12]。PAFC30mg/L,PAM,,PAFC+PAMTP,6。6,PAFC30mg/L,PAM2~4mg/L,,PAM3mg/L,,TP98%,TN、NH3-N、CODCr74%、64%、87%。MAPPAFC,PAM,,。,MAP,[13-14],7。·14·:(1994-),,,,,()sichen214@163.com。:2017-05-26(),,,:MAP3(1)MAP,TP、TN、NH3-N、CODCr。:pH9,n(Mg2+)∶n(PO43-)=1.6∶1,30℃,TP、TN、NH3-N、CODCr94%、54%、48%、75%。(2),MAP,TP、TN、NH3-N、CODCr,。PAFC30mg/L,TP、TN、NH3-N、CODCr96%、67%、57%、83%;PAM3mg/L,TP、TN、NH3-N、CODCr95%、63%、58%、67%;PAFCPAM(PAFC30mg/L,PAM3mg/L),TP、TN、NH3-N、CODCr98%、74%、64%、87%,。(3)MAP,。:[1]LIUY,KUMARS,KWAGJ,etal.Magnesiumammoniumphosphateformation,recoveryanditsapplicationasvaluableresources:areview[J].JournalofChemicalTechnologyandBiotechnology,2013,88(2):181-189.[2]LIUZ,ZHAOQ,WEIL,etal.EffectofstruviteseedcrystalonMAPcrystallization[J].JournalofChemicalTechnologyandBiotechnology,2011,86(11):1394-1398.[3],,.[J].,2014,8(2):563-567.[4]TANGJ,CHENY,ZHONGZ,etal.Temperature-programmedpyrolysisofmagnesiumammoniumphosphateandr
本文标题:MAP结晶法与絮凝剂联用预处理化工含磷废水朱四琛
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