分段进水多级AO工艺计算与探讨

A/O300051A/OA/O、、。。A/OA/O。A/OX703C1000－4602201418－0081－05DiscussiononStep-feedMulti-stageA/OProcessCalculationWANGShun-heGUOShu-qinWEIXin-qingTianjinMunicipalEngineeringDesignandＲesearchInstituteTianjin300051ChinaAbstractThestep-feedmulti-stageA/OprocessisthedeformationprocessofA/Oactivatedsludgeprocessanditgraduallyattractedtheattentioninrecentyears．Thisprocesshastheadvantagesofhighnitrogenremovalefficiencysmalltankvolumelowconstructioninvestmentandoperationcostandsoon．BecausetheprocessisatthestageofdevelopmentinChinathereisnotaunifieddesigncalcula-tionmethod．Acalculationmethodofstep-feedmulti-stageA/Oprocesswasintroducedandthecharac-teristicsofmulti-stageA/Oprocesswereanalyzedtheoretically．Keywordswastewatertreatmentstep-feedmulti-stageA/OprocessflowdistributionratioA/OA/O、、1～3。4～9。A/OA/O。1A/OA/O1A。A1Q1BOD5O1O1A2Q2O1A2BOD5O2AnQnQnBOD5。1A/OFig．1Principleofstep-feedmulti-stageA/Oprocess·18·301820149CHINAWATEＲ＆WASTEWATEＲVol．30No．18Sep．20142η=1－αn1+r+Ｒ×100%1αn———r———Ｒ———1η=1－αn1+r×100%2。①2η=1－1N×11+r×100%3N=11+r1－η。②Ｒ=αn1－η－r－1。3。αx=Qx/Q。TNBOD5N0、S0N1=rNc/r+α1BOD5S1=α1S0/r+α1BOD5Nc。S1=kN1k。N1S1α1=krNc/S0。BOD5TKNα1N0N2=α1N0/r+α1+α2BOD5S2=α2S0/r+α1+α2S2=kα1N2α2=kα1N0/S0。nNn=αn－1N0/r+α1+α2+…+αnnBOD5Sn=S0/r+α1+α2+…+αn。αn=kαn－1N0/S04TKNNc=αnN0/r+α1+α2+…+αn=αnN0/r+1。Ncα1=krNc/S=krαnN0/r+1S05αnα1+α2+…+αn=1。4A/O。。ABtE=2～2．5h10XＲ=0．71000/SVI3t槡Eg/LXn=XＲ×rr+∑nx=1αx6510①3BOD5Kde=N0/S0N0=N－0．05S0－Se－NeKde———kgBODkgN0———mg/LN———mg/L·28·3018．watergasheat．comNe———mg/LS0———BODmg/LSe———BODmg/L②/1。110～12℃Tab．1Designparametersofdenitrification10to12℃VD/VKde/kgNO3·kg－1BOD0．200．110．300．130．400．140．500．15③BOD52。210℃Tab．2Suggestedsludgeageandminimumsludgeage10℃dBODT≤1200kg/dBODT≥6000kg/dVD/V=0．212．513．81011．3VD/V=0．314．315．711．412．9VD/V=0．416．718．313．315VD/V=0．520221618④、BOD5、SSY。Y=0．75+0．6X0S0－1－0．2×0．17×0．75θC×1．072T－151+0．17×θC×1．072T－15X0———mg/LθC———S0———BOD5mg/LT———℃⑤4。A/O。A/Oαxx=1～nXＲrV1=α1QθCYS0－Se1000×XＲrr+α1V2=α2QθCYS0－Se1000×XＲrr+α1+α2NVn=αnQθCYS0－Se1000×XＲrr+∑nx=1αx7VD/VV=V1+V1+…+Vn。66.1A/OA/OA/O。①A/OV=QθCYS0－Se1000×XＲrr+1=r+1QθCYS0－Se1000×XＲr=r+1QCC。②A/OV=V1+V1+…+Vn=α21+α22+…+α2n+α2α1+α3α1+α3α2+…+αnα1+αnα2+…+αnαn－1+α1+…+αnrQC=α21+α22+…+α2n+α1+α2+…+αn22+α1+…+αnrQC=α21+α22+…+α2n2+12+rQCCA/O0＜αn＜1、α1+α2+…+αn=1。α21+α22+…+α2n1A/OA/Oα21+α22+…+α2nαn=1/n。6.236．1A/OBOD5·38·．watergasheat．comA/O3018。4αn=kαn－1N0/S0αn/αn－1=kCTN/CBODN/C＜1/kC/Nαx/αx－1＜1N/C＞1/kC/Nαx/αx－1＞1。BOD5。。6.3A/OA/O23。2Fig．2Crossstagereflux3Fig．3Terminalreflux6.4A/OHＲTHＲT=V/Q。A/OHＲT。。NAOQ/NQ/N2Q/NNQ/NN－1NQ/N。XVn=1NQθCYS0－Se1000×XＲrr+XN8QHＲT1=∑Nx=1VxNXQHＲT2=∑Nx=2VxNXNQHＲTN=VNNNQ=VNQ。8NA/OHＲT1NHＲT1+…+HＲTN=N+12N+rC99A/OHＲTNHＲT。“/”HＲTA/O100%HＲT=13/8CQHＲT1=2512r+1C=3712CQHＲT2=1312r+34C=2212CQHＲT3=712r+24C=1312CQHＲT4=312r+14C=612CA/O。7A/OA/O、、。A/O。·48·3018．watergasheat．com1．J．200319432－36．2．J．2005256641－645．3．AOJ．201238191－194．4．ECOSUNIDEJ．20093511111－113．5．J．201228256－58．6．J．2011271472－74．7．J．2012281451－54．8．J．201329852－55．9．A2/OJ．201228722－26．10．M．2005．1981－。[e-mail]櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆櫆2014－02－1075。。4“”①20～30。②。③。④。1．J．200715622－24．2．J．200417340－42．3．M．1992．1974－、。[e-mail]2014－03－10·58·．watergasheat．comA/O3018