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19 4Vol.19 No.420098JOURNALOFMAOMINGUNIVERSITYAug.2009AAOpH李金浩(茂名市第一污水处理厂,广东茂名525000):AAOpH。,,,,pH,、。:;;;;;;:X703.1:A:1671-6590(2009)04-0021-04AAO,:9.5,FM=0.08;ρ(MLSS)=4000mgL;50%~100%;14.9d。2005,,《》(GB8978-1996),20069,pH,pH6.0,5.0,,。1 AAO工艺出水偏酸问题分析1.1 ,3(),1。1 mgLρ(COD)ρ(BOD5)ρ(SS)ρ(T-P)ρ(T-N)ρ(NH3-N)pH200507—1217830.747.79.484.89.33.32.426.814.725.49.07.47.2200601—0820526.942.812.714110.83.51.429.28.020.68.27.46.7200610—129526.125.58.148.613.92.52.522.320.317.92.27.35.7注:表中除pH一项外,其余各指标的学位均为mgL。,2005、2006,pH、T-P、T-N、NH3-N,COD、SS、BOD550%,NH3-N70%、pH1.5,2006,6。DO2.5~3.5mgL,,,BOD5。,、,,pH。,pH。1.2 1)生物镜检和污泥沉降的情况。。,,。:2009-02-19;:2009-06-01:(1975—),,,,。,。、、。2006111920061220,,;,,SVI50,。,,,,。2)硝化段的工艺状况。NH4++2O2—※NO3-+2H++H2O[1]252,,。pH,,,pHpH。,pH(5.5)。pH5,。,pH(7.25.8),[2]。,,,,,,pH6,,90%。pH。3)系统碱度核算。200719,:ALKw=154.2,ALKc=0.05×(32.7-10.7)=1.1,ALKDN=3.57×(6.9-1.45)×2=38.9,ALKN=7.14×(25.3-1.1)=172.8,ALKE=50,ALKw+ALKc+ALKDN=194.2ALKN+ALKE=222.8。,,,(28.6),,pH5.2。,NH3-N,■ALKN=172.8-28.6=144.2,NH3-N144.27.14=20.2,NH3-N5.1mgL,pH6.5。,BOD5=96mgL、CN=3.0、=1,pH6、BOD510mgL,,ALKDN=3.57×9.1×2=65,ALKc=0.05×(96-10)=4.3,,ALKw+ALKc+ALKDN=223.5ALKN+ALKE=222.7,。,。1.3 1)反硝化反应。5C(C)+2H2O+4NO3—※5CO2+2N2+4OH-,,,。,pH,pH。,。AAONO3-NBOD。CN2.86,CN,。CN=5,,CN=1.0~1.4,,。,,,pH,pH,pH6。2)进厂污水缺氧反硝化试验测定。0.5,4000mgL,MLVSSMLSS=0.5。,,,CN3。,NO3-N,NO2N2,NH3-N,NO3-N1。(1:COD84.5mgL,BOD532.7mgL,CN=1.1。1+:CN=3.0。2:COD=106.0mgL,BOD540.1mgLCN=1.4)1,,2hNO3-N20%,4h60%;+,2hNO3-N57%,4h97%。,,。,。NO3-N,10~12mg,。[3]3)统计了部分运行CN数据。CN,2。22 20092 CNT-N、pHBOD5(mgL)(T-N)(mgL)(NO3-N)(mgL)CN(T-N)%(NO3-NT-N)%pH200507—1247.726.81.71.845(A)127.2200601—0842.829.28.11.538(B)456.7200610—1225.222.316.11.19(C)805.7 ,CN1.8,pH7;CN=1.8~1.4,pH6.7;CN1.4,pH6。CNpH。T-N(A)、(B)、(C)2。图1 NO3-N浓度随时间变化关系图2 CN(以BODTN表示)对总氮去除率的影响1.3 AAO1mgL,BOD5TP20,BOD5TP12~15[1]270。BOD5TP20TP1~2mgL。BODTP,,,。BODTP30,10~15,,,。T-P,2.5~3.5mgL。,T-P,。2 解决对策及最优方案2.1 (1),,,T-P、T-N、NH3-N、COD,,、。1,,、,。,,、,,,,。(2),。、CaO,,pH。pH,、,-,,,m330g,6,1800kgd。,,,。(3)DO。1mgNH3-N4.57mgO2,DO2mgL,234 :AAOpH。DO,。DO,,,COD、SS。(4)MLSS。,,。MLSS1.8gL,、,SS。MLSS。(5)、。。,,,,,。2.2 ,,:(1)MLSS,4000~5000mgL2000mgL,,。(2),DO,2.5~3.5mgL,1.0~1.5mgL,。(3),,,,COD、SS。(4),,,NO3-N,。,NH3-N()。。2.3 ,pH,,pH6.5。3 结束语AAO,,,pH,。,。[][1].[M].:,2003:252-270.[2].[M].:,1998:228.[3].AO[J].,2006,26(4):464-468.AnalysisandCounter-measuresoftheAAOTechnologicalProcesswithAcidEffluentLIJin-hao(MaomingNO.1WastewaterTreatmentPlant,Maoming525000,China)Abstract:Thispaperanalyzestheanoxicanaerobicaerobicprocess(AAO)technologicalprocesswithacidpHValueofeffluent.Bycom-paringrecordeddataandanoxicde-nitrificationtest,itstudiesthede-nitrificationcapabilityofsewageascarbonsource,aswellashowthecarbonandnitrogenaffectthede-nitrificationcapability.Throughassessingthealkalinitybalanceaccounting,thesituationofnitrifica-tionandde-nitrificationwasanalyzed,tofigureoutwhythepHValueistobeacid.Finally,practicableschemestocontrolthepHValuewerepresented.Keywords:nitrification;de-nitrification;carbon-nitrogenratioCN;alkalinityaccounting;predenitrificationprocess;controlscheme;24 2009
本文标题:AAO工艺出水pH值偏酸问题分析及对策李金浩
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