低氧MBR中有机物对脱氮过程的影响竺云波

第37卷第4期2009年8月JOURNALOFZHEJIANGUNIVERSITYOFTECHNOLOGYVol.37No.4Aug.2009:2008-11-07:(1976—),,,,.MBR,(,310005):研究了低氧膜生物反应器(MBR)中有机物对脱氮过程的影响.在进水COD为360,220,140mg/L情况下,生物反应器系统的总氮去除率分别为89%,72%,22%,可以看出有机物质量浓度的降低不利于同步反硝化脱氮;对异养菌的活性产生危害,但却利于硝化菌.这削弱了有机物对硝化作用的抑制影响,使系统中活性污泥具有硝化过程和氨氮同化过程同步进行的特性,在理论上有利于提高低氧脱氮的效率和降低系统的污泥产率.:MBR;硝化;低氧脱氮:X703.1　　　　　:A:1006-4303(2009)04-0402-04EffectsoforganicsontheprocessofbiologicalnitrogenremovalinMBRunderlowDOconditionZHUYun-bo,GAOGang-jian(InstituteofEnvironmentalProtectionandDesign,ZhejingGongshangUniversity,Hangzhou310005,China)Abstract:Inthispaper,theeffectoforganicmatteronthebiologicalnitrogenremovalinMBRunderlowDOconditionwasstudied.ResultsshowedthatatdifferentconcentrationsofinfluentCODof360,220and140mg/L,thecorrespondingremovalsofTNwere89%,72%and22%respectively,indicatingthatthereductionofinfluentCODwasdetrimentaltothesimultaneousdenitrification.Onanotherhand,the“reduction”alleviatedtherestrainingeffectoforganicsonnitrification,whichwasbenefitedfromtheincreaseofnitrificationactivityandthedecreaseoforganicdegradationinthesystem.Thisconsequentlymadeitpossiblethatammoniacouldbeutilizedforassimilationandnitrificationconcurrently,favoringnitrogenremovalunderlowDOconditionandthereductionofsludgeproduction.Keywords:MBR;nitrification;nitrogenremovalunderlowDOcondition0　　,(SimultaneousNi-trificationandDenitrification,SND),(MBR),SND[1-3].,、、、[4].,.,MBR.1　1.1　MBR,,,1.5m2,0.05m,0.35m.16.3L,8h,.22～24℃.,DO0.5～1.0mg/L.40d.1.1-;2-;3-;4-;5-;6-;7-;8-图1　MBR反应器Fig.1　ApparatusofthetestMBR1.2　,、、、、,1.1　Table1　WatercharacteristicsoftheinfluentCOD/(mg·L-1)NH3-N/(mg·L-1)TN/(mg·L-1)TP/(mg·L-1)pH115～30226.1～31.227.2～37.54.1～5.06.2～7.8　　COD,NH3-N,TN,TP,,《》,pHDOPHS-3CYSI(MODEL50B).,13COD360,220,140mg/L,30,20,60d.2　2.1　MBR、,2.图2　各运行阶段MBR系统的运行效果Fig.2　OperationalperformanceofMBRinthedifferentstagesCOD360,220,140mg/L,3,8,15mg/L3.5,8.7,15.8mg/L;,89%,72%,22%.COD,.C5H7NO2,1mg/L5×(16/14)×2+(7/2)×(16/14)=15.43mg/L.,,()0.5.1kg,0.5kg.1mg/L,15.43/2=7.72mg/L,23.15mg/L.,COD741,602,185mg/L,360,220,140mg/LCOD.,,.,0.8mg/L.,.2.2　,.,..,(SOUR),3.·403·4,:MBR图3　各阶段比好氧速率的变化Fig.3　ChangeofSOURinthedifferentstages(),SOUR(),3.,,;,,.2.3　,,[4-6].,.[5].,,,.,(3),.,MBR,,,.,.1000mL(2),3,2.,40mg/L,COD300mg/L0mg/L(NO.1NO.2).pH.DO,pH.4014mg/L.4,5.NO.1,NO.2,.,:(1),;(2),,,;(3),[5].4,,(),.,,,,.,(3),,.,,,.,,2mg/L8mg/L,18%29%.·404·37MBRDO0.5～1.0mg/L,,();MBR,MBR.,MBR—.3　　MBR,,:(1);(2),,;(3),.:[1]　KIMURAK,NISHISAKOR,MIYOSHIT,etal.Baffledmembranebioreactorforefficientnutrientremovalfrommu-nicipalwastewater[J].WatRes,2008,42(3):625-632.[2]　KOMESLIOT,TESCHNERK,HEGEMANNW,etal.Vacuummembraneapplicationsindomesticwastewaterreuse[J].Desalination,2007,215(1-3):22-28.[3]　,,.[J].,2002(2):38-44.[4]　,.DO[J].,2002,18(5):10-13.[5]　HANAKIK,WANTAWINC,OHGAKIS.EffectsoftheActivityofHeterotrophsonNitrificationinaSuspendedgrowthReactor[J].WatRes,1990,24(3):289-296.[6]　JIANGYifeng,WANGLin,WANGBangzhao,etal.Biologi-calnitrogenremovalwithenhancedphosphateremovalin(AO)2SBRusingsinglesludgesystem[J].JournalofEnviron-mentalScience,2004,16(6):1037-1040.(:陈石平)(上接第398页):[1]　.[M].:,1998:598-599.[2]　·,·,·,.4,4'-:CN,200480043546X[P].2004-07-07.[3]　MINORUT,KATSUTOSHIT.Productionof4,4'-dinitro-diphenylsulfide:JP,62255471[P].1987-11-17.[4]　HIRASHIMAT,NISHIGUCHII.Preparationof4,4'-dinit-rodiphenylsulfoneand4,4'-dinitrodiphenylsulfone:JP,57126982[P].1982-08-06.[5]　NAKAJIMAH,YOKOYAMAA.Methodforaminatingbis-bromobenzenecompound:JP,63035549[P].1988-02-16.[6]　ALMAEVANP,GUDALINAN.MethodofPreparing4,4'-diaminodiphenylsulfone:SU,592822A1[P].1978-02-15.(:陈石平)·405·4,:MBR