低强度空气搅拌对猪粪秸秆固体产酸发酵效果影响杜连柱

51环境工程学报Vol.5,No.120111ChineseJournalofEnvironmentalEngineeringJan.2011杜连柱1,2陈羚3张克强1,2梁军锋1(1.,300191;2,300191;3.,100125),,,,VFAs864%843%,7%4%,116%66%;VFAs,(VS),,,,X705A16739108(2011)01020905EffectoflowintensityairstirringonsolidacidogenicdigestionwithpigmanureandstrawasfeedstockDuLianzhu1,2ChenLing3ZhangKeqiang1,2LiangJunfeng1(1.InstituteofAgroEnvironmentalProtection,MinistryofAgriculture,Tianjin300191,China;2KeyLaboratoryofProductionEnvironmentandAgroProductSafety,Tianjin300191,China;3.InstituteofEnergyandEnvironmentalProtection,ChineseAcademyofAgriculturalEngineering,Beijing100125,China)AbstractInthisstudy,anexperimentwascarriedouttoinvestigatetheeffectofairstirringonsolidacidogenicfermentationwithpigmanureandstrawasfeedstockundertheconditionofbiogasslurryreturning.Theresultshowsthataceticacidwhichisdominantinfermentationproductsaccountsfor864%and843%oftotalVFAsinairstirringandcontrolexperiments.Propionicacidwhichisdestructivetomethanogenicaccountsfor7%and4%,andsuccinicacidfractionis116%and66%inairstirringandcontrolexperiments.Theremovalefficiencyofvolatilesolid(VS)ishigherthanthecontrolexperimentthoughthetotalVFAsislowerunderairstirringcondition.Andtheconclusionisthatairstirringcanimprovetheanaerobicconditionandacceleratefermentationprocesseffectively,andairstirringprovidesanewtypeofstirringforsolidfermentationbutanadvancedresearchisneeded.Keywordsairstirring;acidogenicdigestion;acidogenicphase;biogasslurry:(2009DLZ04);(51008163):2010-01-04;:2010-03-26:(1979~),,,,Emai:[e-mail],[12],,,3,;;,,,,[34],,[5][68],5,,,,111,,,11Table1Compositionandanalysisoffeedstock(TS)(%)(VS)(%)C/N87.092.453.324.570.711.9()24.280.722.612,10L,,,,60~70L/min11Fig1Experimentalsetupforsolidacidogenicfermentation1321,,,50%,,,1L,351,2,2min,2d,,1L,351,,1.4pHORPCODVFAs()NH+4NNO-3NTKN(TS)(VS);pHLevel1InolabpH;(ORP)650;COD:[9];NH+4N:[9],NO-3N:[9],UV2802;(TKN):[9];(VFAs),:LC10AVP();:WatersC18,5m,46mm150mm;:;:0005mol/L;:25L;:08mL/min;:30;:210nm221VFAs,VFAsVFAs[1011]2VFAs2(a),,14d,,54g/L,14d,,19d01g/L,,19d28g/L,28d,1g/L,()VFAs843%864%,,,,2(b),,7d,04~06g/L,02g/L,10d,10d,0,,,01~02g/L2101:,()VFAs4%7%,VFAs,,,02g/L,1g/L[3],2(c),,,3d08g/L,,3d,,VFAs116%67%VFAs,,,,,VFAs14d,VFAs,2(d)VFAs,,VFAsVFAs46g/L42g/L3~14d,VFAs,14dVFAs2VFAsFig.2VariationofVFAsduringacidification22ORPpH3(ORP)3,ORP,,,,,,ORP(12h),,,4pH4,,pH21153ORPFig.3VariationofORPduringacidification,VFAs,pH(ORP),ORP,pH[3],3,ORP,pH,pHpH55~7[1213],4pHFig.4VariationofpHduringacidification2.3NH+4NNO-3NTKNCOD,5NH+4N5,NH+4N,5,,24pH,NH+4N,,pH6~65,pH62~75,,pH,NH+4N,NH3,NH3,5NH+4NFig5VariationofNH+4NduringacidificationNH+4NNO-3NNH+4N,,6(24d)pH7,,,H+,pH,4,,,NO-3N(6)6NO-3NFig.6VariationofNO-3Nduringacidification7TKN,8COD,TKNCOD,,,,2121:,,,,TKNCOD,TKNCOD,(28d),,,VS54%,,COD,,CO23(1)pH,(2),TSVS,,VFAs(3),(4),,,[1],,,..,2009,27(3):2630[2],..,2006,24(3):610[3]..:,2006.1315[4],,..,2007,35(28):89618962,9004[5]..:,2004.1213[6],,,..,2008,2(8):10921097[7],,,..(),2005,31(5):603607[8]PrasadK.,InmaculadaB.,LarsE.,etal.Effectofmixingonmethaneproductionduringthermophilicanaerobicdigestionofmanure:Labscaleandpilotscalestudies.BioresourceTechnology,2008,99(11):49194928[9].(4).:,2002.211213,250252,259261,279281[10]WangJ.Q.,ShenD.S.,XuY.H.Effectofacidificationpercentageandvolatileorganicacidsontheanaerobicbiologicalprocessinsimulatedlandfillbioreactors.ProcessBiochemistry,2006,41(7):16771681[11]LimS.J.,KimB.J.,JeongC.M.,etal.Anaerobicorganicacidproductionoffoodwasteinonceadayfeedinganddrawingoffbioreactor.BioresourceTechnology,2008,99(16):78667874[12],,,..,2001,19(2):2529[13]VedatY.,DemirerG.N.Improvedanaerobicacidificationofunscreeneddairymanure.EnvironmentalEngineeringScience,2008,25(3):309317213