超声波处理热处理及酸碱调节对剩余污泥溶解效果的对比研究王晓霞

:,,1973,,,。#。超声波处理、热处理及酸碱调节对剩余污泥溶解效果的对比研究王晓霞　吕树光#　邱兆富　应维琪(,200237)　　　,、3,COD、、。,1.0h、0.167～0.500W/mL,,;,,;(50℃),TN,NH3-N;,pH12.0,4.0h,。3,、。　　　　　　Comparisonofwasteactivatedsludgesolubilizationtreatedbysonication,thermaltreatmentandacid-alkaliadjustment　WANGXiaoxia,LVShuguang,QIUZhaofu,YINGWeichi.(SchoolofResourceandEnvironmentalEngineering,EastChinaUniversityofScienceandTechnology,Shanghai200237)Abstract:　Solubilizationperformancesoforganicmaterials,nitrogenandphosphorusfromwasteactivatedsludge(WAS)samplesusingsonication,thermalandacid-alkaliadjustmentinbatchtreatmentswereevaluated.Bysonication,theorganics(measuredasCOD)andnutrientreleasesfromWASincreasedwithincreasingtreatmenttime(upto1.0h),andsonicationtimeplayedamoreimportantrolethanintensity(0.167-0.500W/mL)inWASsolubi-lization.Bythermaltreatment,thereleasesofbiomassmaterialsincreasedwithincreasingtreatmenttime(upto3.0h)andtemperature(50,70and90℃),butthetemperaturehadthemorecontributiononthereleasesthantreatmenttime.Organic-NofthesupernatantaccountedformostofthetotalnitrogenreleasedfromtheWAS,followedbyNH3-N.ThesludgetreatmentbyadjustingpHfrom3.0to10.0wasunabletocausesubstantialreleasesoforganicandnu-trientspecies,eventreatedatahigherpHof12.0for4.0h,thereleaseswerestillnotapparentinasignificantreductionofTS.Amongthethreetreatmentmethods,sonicationshowedanattractiveprocessforWASsolubilization.Keywords:　wasteactivatedsludge(WAS);sonicationtreatment;thermaltreatment;acid-alkaliadjustment　　,、,。,[1]、[2-4]、[5,6][7,8]。,,、[9],,。,,、。,、,。,[10]。,(),、3,3,。1　1.1　污泥来源与特性/(A/O)。32L,AO8、24L。·56·　　32　8　20108DOI:10.15985/j.cnki.1001-3865.2010.08.0121　Table1　Characteristicsofthewasteactivatedsludgesamples±　　　　　±(TS)/(mg·L-1)6470±720pH7.3±0.2(VS)/TS0.73±0.04COD/(mg·L-1)86.0±6.8COD/(mg·L-1)7440.0±1000.0TN/(mg·L-1)31.1±4.3TN/(mg·L-1)429.0±45.0NH3-N/(mg·L-1)29.3±9.8TP/(mg·L-1)349.00±56.30TP/(mg·L-1)0.26±0.09ortho-P/(mg·L-1)0.17±0.09120L/d,(HRT)6.4h,AOHRT1.6、4.8h。、、、、。,(MLSS)1800～2500mg/L,OA/O6～8d。　　2,。4.6%(,)～6.8%,,1。,TS、VS/TS、COD、TN、TP;pH、COD、TN、NH3-N、TP、(ortho-P)(4000r/min,20min)。2.0h。1.2　实验装置和方法JYD-650L,20～25kHz,650W,10mm。,,15mm。,。0.167、0.330、0.500W/mL,。　　SHY-100A。,,。50、70、90℃3。(20～22℃),(1+1)H2SO44mol/LNaOH,pH3.0、5.0、10.0、12.0。120r/min。　　,(4000r/min,20min),。1.3　分析项目与方法COD、TN、NH3-N、、、TP、ortho-P、TS[11]。　　TS(ηTS,%):ηTS=(S0-Si)/S0×100%(1):S0,mg/L;Si,mg/L。　　COD(ηD,%):ηD=(Di-D0)/Ds×100%(2):DiCOD,mg/L;D0COD,mg/L;DsCOD,mg/L。　　TN、TPCOD。2　2.1　超声波处理,,、,。1(a),3,TS,TS;0.167、0.330、0.500W/mL1.0h,TS33.3%、47.6%、48.8%,。,。,0.167、0.330、0.500W/mL1.0h,COD42.0%、45.6%、54.1%(1(b)),,CHU[12],,0.440W/mL、2.0h20%COD。,TNTPCOD,0.167、0.330、0.500W/mL1.0h,TNTP37.8%、48.4%、47.2%59.5%、68.7%、68.1%(1(c)、1(d))。　　1.0h、0.167～0.500W/mL,;·57·　、1　TSFig.1　ProfilesofpercentreductionofTSandpercentreleaseofcellularconstituentsduringthesonicationtreatment1.0h、0.167W/mL0.500W/mL,TSCOD、TN、TP0.47、0.29、0.25、0.14,。[13],,2COD、TNTP,2COD、TN,A/OTP。　　,TN,NH3-N;1.0h,/TN55.2%～75.8%,NH3-N/TN24.0%～44.8%;、,。C/N,0.3h,COD/(TKN,NH3-N)1.1～2.815.0,1.0h,3COD/TKN17.0,COD/TKN9.0[14],,;,、。2.2　热处理。3,TS2。2(a)、2(b),50℃,TSCOD,70、90℃,TSCOD0.5h,;3.0h,50、70、90℃TS17.3%、31.0%、31.4%,COD17.9%、29.4%、33.9%。,TSCOD。　　TN(2(c))。50℃,TN11%,;70℃,1.0hTN,,TN;90℃,0.5hTN;3.0h,70、90℃TN38.5%、47.3%。70、90℃,TN(/TN64.1%～77.1%),NH3-N(NH3-N/TN21.6%～35.4%),、。,C/N·58·　　32　8　201082　TSFig.2　ProfilesofpercentreductionofTSandpercentreleaseofcellularconstituentsduringthethermaltreatmen。31.0h,COD/TKN10.0,COD/TKN,。　　3,TP,,TP;0.5h,,,3.0h,50、70、90℃TP50.8%、65.6%、73.4%(2(d))。　　,TS;,,。2.3　酸碱调节,、。4pH,pH3.0、5.0、10.0,COD、TN,3.4%、10.8%,;pH12.0,COD、TN,4.0hCOD、TN24.7%、25.3%,TS23.8%(3(a)),pH。4pH,TP,pH12.0TP3pH,4.0hTP50.1%(3(b))。[15]pH=11.0,pH11.0,;11.0,。,,。(pH12.0),pH,4.0h(pH10.0),。2.4　各处理方法效果的比较,,TS、COD、TN、TP。2,,2。TS,2,TS、COD、TN、TP,4。　　4,2TS、COD、TN、TP;,·59·　、3　TSFig.3　ProfilesofpercentreductionofTSandpercentreleaseofcellularconstituentsduringtheacid-alkalitreatment4　TS、COD、TN、TPFig.4　EffectivenessofenergyinputonpercentreductionofTSandpercentreleaseofcellularconstituentsbysonicationandthermaltreatmen;,1,。,、。,,。,,、。3　　(1),,TSCOD、TN、TP50%,,。(2),,TSCOD、、,·60·　　32　8　20108。(3)(50℃),TN,NH3-N。(4),(pH=12.0)4.0h,。(5)、,3,、。:[1]　KOPPJJ,MLLERJ,DICHTLD,etal.Anaerobicdigestionanddewateringcharacteristicsofmechanicallyexcesssludge[J].WaterScienceandTechnology,1997,36(11):129-136.[2]　GONZEE,PILLOTS,VALETTEE,etal.Ultrasonictreat-mentofanaerobicactivatedsludgeinabatchreactor[J].ChemicalEngineeringandProcessing,2003,42(12):965-975.[3]　BOUGRIERC,CARRREH,DELGENSJP.Solubilisationofwasteactivatedsludgebyultrasonictreatment[J].ChemicalEngineeringJournal,2005,106(2):163-169.[4]　VAXELAIRES,GONZEE,MERLING,etal.Reductionbysonicationofexcesssludgeproductioninaconventionalactiva-tedsludgesystem:continuousflowandlab-scalereactor[J].EnvironmentalTechnology,2008,29(12):1307-1320.[5]　SAKTAYWINW,TSUNOH,NAGAREH,etal.Advancedsewagetreatmentprocesswithexcesssludgereductionandphosphorusrecovery[J].WaterResearch,2005,39(5):902-910.[6]　SUZUKIY,KONDOT,NAKAGAWAV,etal.Evaluationofsludgereductionandphosphorusrecoveryefficienciesinanewadvanced