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33EnvironmentalScience&Technology3312F201012Vol.33No.12FDec.2010,,411201PAM45%SV91.6%76.8%45%0.36×1013m/kg86%85.2%71.3%PAM。X705Adoi10.3969/j.issn.1003-6504.2010.12F.0451003-6504(2010)12F-0184-04AStudyontheImprovementinDewateringofSewagSludgebyAddingFlyAshRENBo-zhiHOUBao-linYANGYan-lingSchoolofCivilEngineering,HunanUniversityofScience&Technology,Xiangtan411201ChinaAbstractFlyashisusedtoconditionedforsewagesludge.Somecharactersofsludgeandflyashwereanalyzed.Impactsonsettlingcharacteristicsandvacuumfiltrationdewaterabilityofsewagesludgeundervariousdosagesofflyashwereinvestigatedwithexperiments.UnderoptimaldosagetreatmenteffectsofflyashandPAMwerecompared.Sewagesludgeisclassifiedasadifficultdewateringmaterialonthecontrastflyashisaneasydewateringmaterial.Thesludgesettlingcouldbeimprovedobviouslybyaddingadaptableflyash.When45%(bydryweight)flyashwasaddedtothesludgetheSVofsludgedecreasedfrom91.6%oforiginalsludgeto76.8%.Thevacuumfiltrationdewaterabilityofsewagesludgewasalsoimprovedwhenflyashwasaddedcomparedtountreatedsludge.Theoptimaldosage-45%specificresistancewas0.36×1013m/kgdecreasing86%comparedtothesludgewithouttheadditionofflyash.Thewatercontentofvacuumfiltrationdecreasedfrom85.2%ofuntreatedsludgedirectfiltrationto71.3%.ThetreatmenteffectofflyashwasalittleworsethanthatofPAMunderoptimaldosagesrespectivelywhileflyashhadagreatadvantageineconomywhichprovidesagoodbasisfortheutilizationofflyashinsewagesludge.Keywordssewagesludgeflyashdewaterability2010-10-29(2008SK4029);(08A019)(1967-)、。。。“2009”2009210[1]。。、。、。。[2-4][5][6]。12F5050~100100~50050064.5825.3710.0503170.3619.309.820.52182、(%)SiO2/Al2O3%μm3.445.5319.25.2181、。11.198.5%。PAM1‰。1.21、、、、。0.1MPa。1.30%、15%~30%、45%、60%D-2001T61min2minSV。100mL0.08MPa[7-8]。1.4SCT-3A。SX-8-10600℃4h。[9]MASTERSIZER2000。22.11。2SiO2/Al2O3[10]。。MASTERSIZER200022。2231μm。18μm。2.23。3SV91.6%30min15%、30%、45%、60%SV88.26%、83%、76.8%78.3%45%60%7min45%15%、30%、45%SV3.7%、9.4%、16.2%60%45%18533SV45%。[11-12]。60%TSSV。2.3。4。4SV45%0.36×1013m/kg60%0.48×1013m/kg45%1/3。060%85.2%70.7%。[2]5“”。。2.4PAM6mg/L6。6PAMPAMPAM13%0.2%。PAMPAM。PAM“”。。31SiO2/Al2O3。31μm18μm。215%、30%、45%SV3.7%、9.4%、16.2%18612F158、。。3。[][1].[J].200320(3)10-11.[2],.[J].200124(1)21-26.[3],.[J].,2008,38(6):1281-1286.[4],,.[J].2005,31(3):52-54.[5].[D].2006.[6].[J].,2005,30(1):104-108.[7],,,.[J].,2003,31(4):311-3l6.[8],,,.[J].,2002,18(4):10-13.45%60%。3。45%0.36×1013m/kg71.3%。4PAMPAM。[][1]2009[N].[2],,,.[J].,2006,7(3):65-67.[3]JungEunLee,JaeKeunLee,DongSooKim.Astudyoftheimprovementindewateringbehaviorofwastewatersludgethroughtheadditionofflyash[J].KoreanJChemEng,2010,27(3):862-867.[4],,.[J].,2006,8(7):114-116.[5],,,.[J].(),2008,33(5):65-85.[6],,,.[J].,2007,30(4):98-100.[7],.[M].,2006:601-605.[8],,.[J].200928(1)68-70.[9]HoughtonJenniferI,StephensonTom.Effectofinfluentor－ganiccontentondigestedsludgeextracellularpolymercon－tentanddewaterability[J].WaterResearch,2002,36(14):3620-3628.[10]HunterRJ.ZetaPotentialinColloidSciencePrinciplesandApplications[M].NewYork:AcademicPress,1981:32.[11]WhiteSC,CaseED.Characterizationofflyashfromcoal-firedpowerplants[J].JournalofMaterialsScience,1990,25(12):5215-5219.[12]XueQing-feng,LuSheng-gao.Microstructureofferro－spheresinflyashs:SEM,EDXandESEManalysis[J].Jour－nalofZhejiangUniversity-ScienceA,2008,11(9):1595-1600.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!187