高氨氮印染废水生物脱氮试验吴海锁

　　　200927＊吴海锁1　郭方峥1　刘伟京1　顾晓东2　涂勇1　梁志冉1(1.,　210036;2.,　210093)　:采用序批式活性污泥法(SBR)处理经上流式水解酸化池处理后的印染废水。试验表明,以调整充水比增加碳源的方式不能满足系统反硝化脱氮的需要,需外加碳源。在充水比为0.3时,以甲醇作为外加碳源的脱氮效率最高,比食用蔗糖和工业葡萄糖分别高了12.11%和18.72%。控制C/N比为8.7时,基本可以满足系统的脱氮要求。对反硝化速率的测定发现,不同C/N下,反硝化均经历了开始较快,后逐渐减缓并最终趋于停止的过程,且C/N比越高,反硝化速率越快,趋于停止的时间越晚。:脱氮;充水比;外加碳源;C/N;反硝化速率EXPERIMENTONNITROGENREMOVALFROMHIGHNITROGENPRINTINGANDDYEINGWASTEWATERWuHaisuo1　GuoFangzheng1　LiuWeijing1　GuXiaodong2　TuYong1　LiangZhiran1(1.JiangsuProvincialAcademyofEnvironmentalScience,Nanjing210036,China;2.SchoolofEnvironment,NanjingUniversity,Nanjing210093,China)Abstract:Sequencingbatchreactor(SBR)wasusedtotreattheprintinganddyeingwastewaterwhichhadbeendisposedbyhydrolyticacidification.Theresearchindicateditcouldn'tmeettheneedofdenitrificationofthesystembyadjustingfill-waterratio,soitneedsadditionalcarbonsource.Whenfill-waterratiowas0.3,thenitrogenremovalefficiencywasthehighestbyaddingcarbonsourcetothesystem;itwashigher12.11%and18.72%higherthanaddingediblecanesurgeanddextrose.WhentheC/Nwas8.7,thenitrogenremovalneedwasmet.Bymeasuringthedenitrificationratesitwasfound,indifferentC/N,thedenitrifica-tionrateswererapidfirstly,thenfellslowlyandstoppedatlast.AndthehigherofC/N,thedenitrificationrateswererapid,anditwaslatertostop.Keywords:nitrogenremoval;fill-waterratio;additionalcarbonsource;C/N;denitrificationrate＊。0　,、、、、、、,、、、、、[1-3],,,,,。,80%,,,,TN。。1　1.1　试验装置与工艺1,。SBR,150mm,600mm,4,1,8.8L。、SBR、、、。12h,2.5h,5.5h,2h,2h。4SBR,3。1,,。2,,,。1～3SBR、、,4130DOI:10.13205/j.hjgc.2009.s1.146　　　200927SBR,。3,,C/N。1～3SBR,4SBR。1　1.2　试验水质。。,1。1　mg/L(pH)ρ(COD)ρ()ρ(TN)pH326～65454～10963～1098.19～9.36410.3992.4185.258.961.3　污泥驯化A/O,4,3000mg/L。,12h,5.5h,2.5h,2h,2h,0.2。COD70%,95%,。1.4　碳源COD的测定COD,,COD。0.25,0.5,1,1.5ml/LCOD,256,528,928,1457mg/L。,(x)COD(y):y=965.9x+16.767,R2=0.9991。0.25,0.5,0.75,1mg/LCOD,376,608,936,1136mg/L。,(x)COD(y):y=1132.8x+44.8,R2=0.9904。0.3,0.6,0.9,1.2mg/LCOD,324,636,952,1236mg/L。,(x)COD(y):y=1033.3x+9.6,R2=0.9995。2　2.1　最佳充水比的确定。1、2、3SBR0.2、0.3、0.4,。3COD。,COD,0.2、0.30.4,COD69.34%、68.43%、69.79%;96.35%、95.37%、97.38%,。TN,,,1SBRTN,2,3,32。2　TN2,TN,,0.20.4,TN72.67mg/L66.38mg/L,16.54%23.7%。,,,,。0.30.4,,1.34%,TN。0.3,,。131　　　2009272.2　碳源的选择0.3,C/N4.4,C/N6.6,1～3COD200mg/L0.49mL,0.34g,0.46g;4。,4COD,COD67.61%～71.11%,96.51%～97.54%,COD。1～3TN4,1TN,2、3,TN,。3。3　TN3,1～3SBRTN,4TN,15.83%。,B/C,0.2,,,,。,1TN,43.77mg/L,44.99%;23。,,,。HamazahZ,240～1300mg/L,,95%～97%[4]。2mg/L[5]。,,,,TN。,TN,。2.3　最佳碳氮比的确定1～3SBRCOD500,400,300mg/L,9.8、8.77.7。4SBR,4SBR,C/N4.4。,COD72%,97%,C/NCOD。1～3TN15.18,15.56,30.53mg/L,83.57%、83.16%、66.96%,4TN69.66mg/L,24.62%。C/NTN。4,C/N,TN。12SBRTN3,C/N,12SBRTN,COD400mg/L500mg/LTN。:η=(1-11+r)×100%,70%(0.32.3)。1、2SBRTN,,。31、2,,TN,。,2.9。TN92.41mg/L,COD268mg/L。,,3SBR,。1SBRTN2SBR,2SBR,1SBRTN。,COD400mg/LC/N8.7。TN。2.4　不同碳氮比下的反硝化速率4SBR,C/N132　　　2009274　TN。0,0.5h,,2.5h,3500mg/L,5。5　5,,。C/N,,。0.5h,1～44.02,3.54,3.42,2.28mg/(g·h),,1～3SBR,4SBR。,。0.5h,12SBR,2.5h,12SBR2.65,2.48mg/(g·h),。31.5h,3.01mg/(g·h),1.5h,,2.05mg/(g·h)。40.5h,0.68mg/(g·h)。,C/N,C/N。,,。,,,。3　1),0.3。,。,,。2)0.3,、,,12.11%18.72%。3)8.7,,TN,15mg/L。4)C/N7.7～9.8,,,。C/N,。[1],,.[J].,2008,25(3):56-59.[2],,.[J].,2008,25(3):177-180.[3],,,.[J].,2007,59(1):60-62.[4]HamazahZ,GhararahA.Biologicaldenitrifieationofhighnitratewater:influenceoftypeofcarbonsourceandnitrateloading[J].JEnvironSciHealth,1996,31(7):1651-1668.[5],,。[J].,2004,5:74-77.[6],,,.[J].,2005,27,(9):641-643.[7],,,.A/O[J].,2004,14(9):106-110.[8],,,.[J].(),2002,31(3):41-44.　　200036　164E-mail　[e-mail]2009-02-20133