超声破解促进污泥高温厌氧消化研究

韩育宏1,季民2,李庆1,张子生1,刘志强1,何寿杰1(1.河北大学物理科学与技术学院,河北保定071002;2.天津大学环境科学与工程学院,天津300072):城市污水厂的剩余污泥经槽式超声波反应器预处理后,被投加到小型高温厌氧反应器中进行消化处理,通过改变投配率来控制厌氧消化时间,研究超声破解对高温厌氧消化反应速率和效率的影响试验结果表明,与未经预处理的污泥相比,超声破解能够明显提高污泥高温厌氧消化的生物气产量及对有机物的去除率控制组在停留时间为20d时对TCOD的去除率为37.29%,而破解污泥在第8天时的去除率就达到了39.60%这表明污泥经超声破解后其厌氧消化性能得到改善,超声破解不但可以提高厌氧消化对有机物的去除率,而且可以缩短反应时间,在不影响厌氧消化反应正常进行的条件下,还实现了污泥的减量化:剩余污泥;超声破解;高温厌氧消化;污泥停留时间:X703:A:1000-4602(2010)03-0030-04:;(2008Q13)AccelerationofSludgeThermophilicAnaerobicDigestionbyUltrasonicDisintegrationHANYuhong1,JIMin2,LIQing1,ZHANGZisheng1,LIUZhiqiang1,HEShoujie1(1.CollegeofPhysicsScienceandTechnology,HebeiUniversity,Baoding071002,China;2.CollegeofEnvironmentalScienceandTechnology,TianjinUniversity,Tianjin300072,China)Abstract:Excesssludgecollectedfrommunicipalsewageplantwasfedintoasmallthermophilicanaerobicdigestionreactorafterbyultrasonicpretreatmen.tTheeffectofultrasonicdisintegrationonreactionrateandefficiencyofthermophilicanaerobicdigestionwasstudiedbychangingthedosageratetocontroldigestiontime.Theremovalrateoforganicmattersandbiogasproductioninthethermophilicanaerobicdigestionofdisintegratedsludgeareimprovedcomparedwithnonpretreatedsludge.TheremovalefficiencyofTCODinthecontrolgroupis37.29%ataretentiontimeof20dwhilethatfromdisintegratedsludgeis39.60%ataretentiontimeof8d,whichshowsthattheanaerobicdigestionperformanceofdisintegratedsludgeisimproved.Theultrasonicdisintegrationcanincreasetheremovalrateoforganicmattersinanaerobicdigestionandreducereactiontime.Thesludgereductionisachievedwithoutinfluencingthenormaloperationofanaerobicdigestion.Keywords:excesssludge;ultrasonicdisintegration;thermophilicanaerobicdigestion;sludgeretentiontime30第26卷第3期2010年2月中国给水排水CHINAWATER&WASTEWATERVo.l26No.3Feb.2010,[1~5],,TiehmA[67](53%47%),22d8d,45.8%50.3%,CH42.2,Bougrier[8]20kHz,660~4547kJ/kgTS,25%,(VSS),,,,,1试验材料与方法11,25~35g/L(2.5%~3.5%),4,(TS)30g/L,(VS)15g/L,TCOD26g/L12,40(50W2)28(75W2)20kHz(75W2),400W,4.8L,200mm120mm200mm,3L,0.133W/mL,(90min)1,,2L,,pH1,21Fig.1Experimentalsetupforanaerobicdigestion,,5%100mL,:37394245485155,,2,;190min(),201084d13COD:;VSVSS:;(VFAs):[9];:[10];pH:HI193212结果与讨论21TCODVS,TCODCOD23,2TCODVS23,,,TCODTCODVS,31韩育宏,等:超声破解促进污泥高温厌氧消化研究第26卷第3期2TCODFig.2RemovalofTCODinthermophilicanaerobicdigestionofsludge3VSFig.3RemovalofVSinthermophilicanaerobicdigestionofsludge8d10d,VS30.42%31.36%,VS33.69%35.61%,,VSVS,,TCOD,8d,TCOD,39.60%;20d,TCOD,37.29%,8d,,20d,1,TCODVS,,22121Tab.1Productionofbiogasunderdifferentconditions/d201084/(mLd-1)218.3641.48901698340.3750.51001.31822.7/(Lg-1VS)0.3590.7330.7120.6290.7540.8280.8120.6611,(),201084d,1.61.21.11.1,,10d,,0.7330.828L/gVS20d,,,,,,4d,,,1VFAs(103~143)(124~171)mg/L209321mg/L,,,23VSS,2VSS44,VSS,35.96%~37.92%,VSS,104d,90minVSS41.48%48.03%,32第26卷第3期中国给水排水~7.654d,pH,VFAs2077~2812mg/L(CaCO3,),2191~2871mg/L,pH,2000mg/L,,,,,pH,,,3结论,,,,,:[1]NahIW,KangYW,HwangKY,etal.Mechanicalpretreatmentofwasteactivatedsludgeforanaerobicdigestionprocess[J].WaterRes,2000,34(8):2362-2368.[2]LinJG,ChangCN,ChangSC.Enhancementofanaerobicdigestionofwasteactivatedsludgebyalkalinesolubilization[J].BioresourTechno,l1997,62(3):85-90.[3]GrajaS,ChauzyJ,FernandesP,etal.ReductionofsludgeproductionfromWWTPusingthermalpretreatmentandenhancedanaerobicmethanisation[J].WaterSciTechno,l2005,52(1-2):267-273.[4]ScheminskiA,KrullR,HempelDC.Oxidativetreatmentofdigestedsewagesludgewithozone[J].WaterSciTechno,l2000,42(9):10-15.[5]MullerJA.Pretreatmentprocessesfortherecyclingandreuseofsewagesludge[J].WaterSciTechno,l2000,42(9):167-174.[6]TiehmA,NickelK,NeisU.Theuseofultrasoundtoacceleratetheanaerobicdigestionofsewagesludge[J].WaterSciTechno,l1997,36(11):121-128.[7]TiehmA,NickleK,NeisU.Ultrasonicwasteactivatedsludgedigestionforimprovinganaerobicstabilization[J].WaterRes,2001,35(8):2003-2009.[8]BougrierC,CarrereH,DelgenesJP.Solubilisationofwasteactivatedsludgebyultrasonictreatment[J].ChemEngJ,2005,106(2):163-169.[9],,,.(VFA)[J].,2000,33(6):31-34.[10].[M].:,1998.:(1982-),,,,,:(0312)50794191593186227E-mail:[e-mail]:2009-08-0733韩育宏,等:超声破解促进污泥高温厌氧消化研究第26卷第3期