城市污泥好氧堆肥过程中积温规律的探讨

22620026ACTAECOLOGICASINICAVol.22,No.6Jun.,2002,,,,,(,100101):(962909201205):2001209207;:2002202225:(1963),,,,E2mail:[e-mail]:,()(CTB),15,10000h:;;AccumulatedTemperatureasanIndicatortoPredicttheStabilizingProcessinSewageSludgeCompostingCHENTong2Bin,HUANGQi2Fei,GAODing,HUANGZe2Chun,ZHENGYu2Qi,LIYan2Xia(LaboratoryofEnvironmentalRemediation,InstituteofGeographicSciencesandNaturalResourcesRe2search,ChineseAcademyofSciences,Beijing100101,China).ActaEcologicaSinica,2002,22(6):911915.Abstract:Accumulatedtemperatureisanimportantindexoftherequiredheatconditionduringthegrowthofplant.Theaccumulatedvalueofdailytemperatureduringthegrowingperiodisrelativelysteady.Likethegrowingprocessofplant,theheatconditionisalsoimportantforthecompostingprocess.Thetwoaimsofcompostingprocess,eliminatingpathogenandstabilizingorganicmatter,allrelatestotheheatcondition.Itisnecessarytokeepthecompostingprocessduringthemoderatetemperatureforaperiodoftimetocompletethestabilizingprocess.Thespeciesandactivityofmicroorganismsareveryimportanttothestabilizingprocess.Thechemicalreactionincreasesonetimemorewhenthetemperatureincreases10duringtherangeinwhichissuitableformicroorganismsgrowth.Thehigh2temperature2short2periodreactionandthelow2temperature2long2pe2riodreactionachievetheapproximatelystabilizingeffect.Sothedeterminatetemperatureandthedurationduringthetemperatureareallrequiredforthestabilizingprocess.Thestudywascarriedouttoinvestigatetheaccumulatedtemperatureduringthestabilizingprocess.Allexperimentedcompostingpileswereplacedinabuildingintwo116m110mbayswithcementfloorsandwalls.Aerationboardswerelaidonthebottomofthebays.Thepilescontainedsewagesludge(moisture=83%85%,volatilesolid=49%58%,CöN=516,pH=615815),recycledcompostandbulkingagentwithsixproportions.Abulkingagentlayerontheaerationboardsdispersedairthroughthe110mhighmixlayer.Allpileswerecoveredwitha20cminsulatinglayerofrecycledcompost.Eachbayhadaaeratortosupplyair.Sensorswereinsertedintothegeometricalcentersofpilestodetectthepiletemperatures,andthedetectedvalueswerefedbacktothecomputerizedcontrolsystem.Athree2stagecontrolalgorithmcontrolledthedamperdutycycleofaerators.Thecontrolsoftwareloggedtemperaturesevery15minutesandgeneratedreports.Whenthecompostingprocesswasduringthetemperature2de2©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.creasingperiod,thecompostingmaturitywasdetectedeveryday.Whenthecompostprocesshadcomplet2ed,thecompostingtimewasloggedandtheindexofaccumulatedtemperaturewascalculated.Theresultindicatedthatacompletecompostingprocesswascomposedoffourperiods:temperatureslowlyincreasingperiod,temperaturefastincreasingperiod,hightemperatureperiodandtemperaturede2creasingperiod.Thetemperaturedevelopingtrendsofdifferenttreatments,aswellasthedurationsofcompostingprocesses,werenotcompletesimilar.Thecompostingdurationwasshortwhenthecompost2ingtemperaturewashigher;ontheotherhand,thecompostingdurationwaslongwhenthecompostingtemperaturewaslower.Therequiredheatconditionsofdifferenttreatmentsweresimilarwhenthestabi2lizingprocessnearlyfinished.Theindicatorofaccumulatedtemperaturerequiredforthestabilizingprocesswerecalculatedusing10,15and20asthebiologyzeros,respectively.Thestatisticsofthevarianceweresmallerwhenusing15asthebiologyzero,soitwasappropriatetousethevalueasthebiologyzeroanditsindexofaccumulatedtemperaturewasabout10000h.Thefactorsinfluencingaccumulatedtemperatureincludedthepropertiesofcompostingmaterials,compostingtechnics,thebiologyzeroofmicroorganismandtheenvironmentconditions.Theindexcouldbeusedtodefinetheheatconditionrequiredduringthecompostingprocessandpro2videthesciencebasistoimprovethecompostingtechnics.Theindexcouldalsobeusedtodefinethematu2rityofcompostandpredictthecompostingprocess.Theconceptofaccumulatedtemperatureinphenologywasintroducedtocompostingsciencetoquanti2tativelyanalyzetheheatconditionduringthestabilizingprocessandwhichincludedthetemperatureinten2sityandtheduration.Itwasverifiedthattheaccumulatedtemperaturecouldbeusedtopredictthestabi2lizingprocessofsewagesludgecomposting.Theresultshouldbetestedincompostingofotherorganicwastes.Keywords:accumulatedtemperature;sewagesludge;composting:100020933(2002)0520911205:S14116,X705:A1735,A.F.,,,,[1,2],,,,[3],5535d,505557d,[4][5],:,,,,:,(3040),,,,[6,7],[8],(),(),3040,5060,21922©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.[8],,10,[5],,,(),,1111,83%85%,49%58%,CöN516,pH615815(CTB,)2170%6517%3911%3813%112116m110m111m,[9]113,6,1,1,2,2(1),(Compsoft)(CTB),15min,[10],,1Table1DateandtreatmentsofthecompostingTreat2mentsMixingratio(CTB)(SewagesludgerecycledcompostCTBbulkingagent)(2)Date(Year2Month)É2111999211Ê1012000203Ë3122000205Ì1012000209Í1012001203Î10115200120322111,,,4d5060ÍÎ,,,,,,,,,(3040),Miller,[11]1,4,,,CO2H2O,,[12],(5057d),,[10],,,4,,,3196:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1Fig.1Temperaturedynamicsofsewagesludgecom2postingÉÎ1.ÉÎtreatmentsseetable1,(1),,,,,,212,,,,,,,,[13],:T=2(Ti-T0)$t(1)Tii,T0()$tTiMosherAnderson,20,[14](ÍÎ),10,,10,,,,T0101520(1)22Table2Theav