导流板厌氧限氧循环反应器的污泥减量效果研究

/许晓毅1,谢恩1,罗固源1,阕添进2(1.重庆大学三峡库区生态环境教育部重点实验室,重庆400045;2.中国市政工程西南设计研究院,四川成都610081):基于弧形导流板厌氧/限氧混合液半循环反应器,进行了不同工况条件下污泥减量效果的正交试验结果表明,反应器中污泥混合液的循环速度对污泥减量效果的影响相对较大,且污泥减量反应器的较佳运行条件为:循环速度为0.2m/s,限氧区DO为1.0mg/L,HRT为8h将减量反应器嵌入A/O脱氮系统的污泥回流旁路,进行了处理生活污水的连续流试验嵌入减量反应器前后,A/O系统对COD的去除率相差不大,对TN的去除率增加,对TP的去除率受排泥量减少的影响而略微下降嵌入减量反应器后A/O系统的污泥产率为0.23gMLSS/gCOD,较对照系统减少约34.0%,污泥脱氢酶活性的平均值提高了约5.6%经分析,污泥减量反应器的污泥减量机制主要为解偶联作用,其次为污泥在缺乏营养物时进行的代谢衰竭与溶胞减量反应器中特殊的厌氧/限氧混合液循环,可使其在相对较短的停留时间下就能取得较好的污泥减量效果:厌氧/限氧半循环;污泥减量;污泥产率:X703:A:1000-4602(2010)11-0029-05:(2007DFA90660);(CSTC,2008BB73052008AB7133)SludgeReductioninAnaerobic/Oxygen-limitedCirculationReactorwithGuidePlateXUXiao-yi1,XIEEn1,LUOGu-yuan1,QUETian-jin2(1.KeyLaboratoryofThreeGorgesReservoirRegion.sEco-EnvironmentMinistryofEducation,ChongqingUniversity,Chongqing400045,China;2.SouthwestMunicipalEngineeringDesignandResearchInstituteofChina,Chengdu610081,China)Abstract:Basedontheanaerobic/oxygen-limitedmixturesem-icirculationreactorwitharcguideplate,orthogonalexperimentsonsludgereductionunderdifferentconditionswerecarriedou.tTheexper-imentalresultsshowthatthecirculationrateofsludgemixturehasanimportanteffectonsludgereduction.Theoptimaloperationconditionsareasfollows:circulationrateis0.2m/s,DOinoxygen-limitedzoneis1.0mg/L,andHRTis8h.Continuousflowtestsfordomesticsewagetreatmentwerecarriedoutbyse-ttingthereactorinthesludgereturnbypassofA/Odenitrificationsystem.Comparedtothecontrolprocess,CODremovalrateshowslittledifference,WhileTNremovalefficiencyincreasesandTPremovalefficiencydecreasesslightlyduetothereductionofsludgedischarge.ThesludgeyieldintheA/Osystemaftersettingsludgereductionreactoris0.23gMLSS/gCOD,being34.0%lessthanthatinthecontrolsystem.Theaveragedehydrogenaseactivityisincreasedby5.6%.Thesludgereductionmechanismismainlyuncouplingfollowedbymechanismfailureandlysisofsludgeinlackofnutrien.tThespecialan-#29#第26卷第11期2010年6月中国给水排水CHINAWATER&WASTEWATERVo.l26No.11Jun.2010aerobic/oxygen-limitedmixturecirculationinthereactorcanachieveexcellentsludgereductioneffectatrelativelyshortresidencetime.Keywords:anaerobic/oxygen-limitedsem-icirculation;sludgereduction;sludgeyield[12],,,[34],/,ADPATP,OSA,/(,SRR),,1试验装置与方法11111Fig.1Schematicdiagramofsewageprocess1(1)(2)A/O2,42L,60cm,A/O,,,,(),2Fig.2Sketchofsludgereductionreactor112,L9(33)4400mg/L,,11Tab.1Factorsandlevelsinorthogonalexperiment/(m#s-1)DO/(mg#L-1)HRT/h10.10.5420.21.0630.32.08,,7L/h,A/ODO2.5mg/L,13d,70%,HRT7h(AO2h5h),MLSS3100mg/L#30#第26卷第11期中国给水排水[5],2结果及讨论21122Tab.2ExperimentalresultsoforthogonaltestsDOHRT/g113123.058212225.116311327.384421123.436523255.230622365.034732144.268831265.158933380.514K175.558115.97890.762K2143.700134.418145.504K3189.940158.802172.932R114.38242.82482.1702,,,,9,86,43.6%35.4%35.3%,89,[6],,,9,,6,0.2m/s,DO1.0mg/L,HRT8h21221211A/O,CODTNTP3COD219~455mg/LTN30.25~62.18mg/LTP3.12~5.59mg/L,CODTNTP22.57.852.28mg/L,93.80%81.85%48.45%;CODTNTP19.46.972.95mg/L,TN85.01%,,TP34.68%3CODTNTPFig.3ComparisonamongCOD,TNandTPremovaleffects3(a),,COD,,A/O[7],[8],#31#许晓毅,等:导流板厌氧/限氧循环反应器的污泥减量效果研究第26卷第11期,[910]21212A/O,(1)(2)()COD44Fig.4Cumulativeproductionofsludge4,,(2),(1)(2)15d372.7246.9g(),0.4470.295gMLSS/gCOD,,34.0%,,,[3]A/OATP,,ATP,1minC-[1112],()(),,,,[13],,,[14],,21213,SVI82mL/g,,,//,[15],,[16]7.82LgTF/mgVSS(5),5.6%(57.38LgTF/mgVSS)/OSA[17]3结论¹:0.2m/s,DO1.0mg/L,8hºA/O,TN,TP0.295gMLSS/gCOD,34.0%»,/,:[1]GUOXue-song,LIUJun-xin,WEIYuan-song,etal.SludgereductionwithTubificidaeandtheimpactontheperformanceofthewastewatertreatmentprocess[J].JEnvironSc,i2007,19(3):257-263.[2]TsuyoshiIchinar,iAkitakaOhtsubo,TetsunoriOzawa,etal.Wastewatertreatmentperformanceandsludgereduc-tionpropertiesofahouseholdwastewatertreatmentsys-temcombinedwithanaerobicsludgedigestionunit[J].ProcessBiochem,2008,43(7):722-728.#32#第26卷第11期中国给水排水[3],./[J].,2005,25(2):34-37.[4]LowEW,HowardAC,MilnerMG,etal.Uncouplingofmetabolismtoreducebiomassproductionintheactivatedsludgeprocess[J].WaterRes,1999,34(12):3204-3212.[5],.TTC)[J].,1996,16(4):400-405.[6],,.[J].,2001,17(11):24-26.[7],,,.--[J].,2008,29(3):726-732.[8].ERP-SBR[D].:,2004.[9],,,.LSP&PNR[J].,2007,23(3):34-39.[10],,,.LSP&PNR[J].,2008,2(1):105-109.[11].[M].:,2002.[12]QuayleJR.MicrobialBiochemistry[M].England:Un-iversityParkPress,1979.[13],,,.[J].,1999,12(1):16-18.[14]ChenYinguang,JiangSu,YuanHongying,etal.Hydro-lysisandacidificationofwasteactivatedsludgeatdiffer-entpHs[J].WaterRes,2007,41(3):683-689.[15],,,.--[J].,2007,28(11):2488-2493.[16].-[D].:,2008.[17]ZhangZhen-Peng,ShowKuan-Yeow,TayJoo-Hwa,etal.Effectofhydraulicretentiontimeonbiohydrogenproduc-tionandanaerobicmicrobialcommunity[J].ProcessBiochem,2006,41(10):2118-2123.:(1974-),,,,,:13883402784E-mail:[e-mail]:2009-12-24(上接第28页)»,:[1]LeeG,GoodleyJ,,.[J].,2006,22(2):26-30.[2]LiuW,LeeG,,.[J].,2006,22(8):29-32.[3],,,.A2/O[J].,2009,25(9):12-15.[4].[J].,2009,(1):38-41.[5].[J].,2009,22(4):44-47.[6],LeeG,,.[J].,2007,23(14):29-32.[7],,.(ENR)[J].,2009,(1-2):56-61.[8],,.[J].,2009,30(3):257-261.:(1976-