搜索
:2003203211:(1975-),,,2000,(,200092):,()()(DSC)()(1800rpm-2min)(4800rpm-45min)(SSCODTP):Fe3+CaO,,:,;ECP:H+,,;ECP,:;;;;:X70315:A:100123644(2003)0520001208StudyonEffectofSurfactantandAcidTreatmentonSludgeDewaterabilityYUANYuan,YANGHai2zhen(StateKeyLaboratoryofPollutionControl&ResourceReuse,SchoolofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China)Abstract:Thisworkstudiesoneffectsofsurfactantandacidtreatmentonsludgedewaterabilityandtheirfunctionmechanism.Vari2ousschemesusingoptimaldosageswerecomparedbytheimpactsfromsludgenaturetodewateringaction.SludgenatureincludesthesizeandstructureofflocwatchedbyeyesandmicroscopesandthecontentoftheboundwaterdeterminedbyDSCmethod.Dewateringactionincludeddewateringvelocityoffiltration(SRF),velocityofcentrifugation(solidcontentofthecakeafter1800rpm-2min-centrifuga2tion),extent(solidcontentofthecakeafter4800rpm-45min-centrifugation)andsupernatantquality(SS,COD,TP,transparen2cy).Experimentalresultsindicatethatsurfactantandacidtreatmentcangreatlyimprovesludgedewateringextent,althoughtheyhavenptbigfunctiononimprovingdewateringvelocityexcepttheco2useofsurfactantandFeCl3-CaO.Thefunctionmechanismsofsur2factantarethatitcanmakesludgeflocdisintegrateandreleasetheboundwaterintheoriginalflocs.Atthesametime,surfactantcanal2sodissolveECP.ThefunctionmechanismsofacidarethatitcanmodifysludgeflocpssurfacepropertiesanddissociateECPwhichresultinmoreflocculationofflocsanddecreaseofflochydration.Keywords:Sludge;conditioning;mechanicaldewatering;surfactant;acidtreatment1,,,,,,,(Fe3+)(PAM),[1,2],,,,,,12003225©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,[3],,,,ZagyvaiCM-1SD-42;S.ChitikelaHDT2MAPAM;J.RuhsingPan[4],pH,,,,pHpH;Block,pH;CSTpH,pH;Mark.M,10,ECP;:(2000rpm-115min);(0105Mpa-30min)DNAECP,ECP,,,[5]:()(),,,11:;;;;;;;;PAM;PAM;PAM,11,,11()()([DSC]),,(SSCODTP),(1800rpm)(2min)(4800rpm)(45min)2211A4UNITANK,0163%,VS/TS52142%,pHB23,0186%,VS/TS78143%,pH,10%(w/w);PAM1%(w/w),,1(w/w)1,,,112Table1Variousconditionschemesusingtheoptimaldosagesforcomparison(:;+)128%320%420%+18%520%+18%+8%(A)6%(B)610%710%,20%84%+10%,20%920%+30%+6%10PAM5112%+PAM51220%+18%+PAM522003225©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2121()400mlA,,160rpm30s,40rpm2min(ZR4-6),1800rpm(GL-20B)2,,5,110120C(101-3)4,,(FA2004),,pH(pH)CODSSTP2()50mlB,,,4800rpm(GL-20B)45,,105C(202AS-2)10,,(MettlerToledoAB204-E),,pHpH[6],,:A.;B.12kPa;C.C,(g)/(ml)A1,,DMLB,Q500LWLeiCa,100mlA,,,,[79]50mlB,,,3000rpm(GL-20B)10,,:SetaramDSC141(),65mg,SartoriusBS110S-2/min-25,30(H),,(Wf):Wf(mg)=1163H(J)105C(202AS-2)10,,(MettlerToledoAB204-E),,(Wt)(TS),(Wb):Wb(mg/mg)=(Wt-Wf)/TS1250ml,110120C(101-3)2,,(FA2004),SSCOD,[10];TP,,[11],UV-754C33.1,,:;,,PAM,,()(100):,,,,,,,,,(,):,,,(2,34,6);,,,(),(7,8,10),(1,59)32003225©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1(2000)Figure1Theoriginalsludge(32000)2(3000)Figure2Theoriginalsludge(33000)3(4000)Figure3Theoriginalsludge(34000)4(1500)Figure4Thesludgeaddedwithsurfactant(31500)5(2000)Figure5Thesludgeaddedwithsurfactant(32000)6(5000)Figure6Thesludgeaddedwithsurfactant(35000)7(500)Figure7Thesludgeaddedwithacid(3500)8(2000)Figure8Thesludgeaddedwithacid(32000)9(2000)Figure9Thesludgeaddedwithacid(32000)42003225©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.10(10000)Figure10Thesludgeaddedwithacid(310000)312(11)(12)(13,14)11Figure11Effectofsurfactantandacidtreatmentonthecontentofthesludgeboundwater12Figure12Effectofsurfactantandacidtreatmentonthesludgedewateringextent13Figure13Effectofsurfactantandacidtreatmentonthesludgedewateringvelocityofcentrifugation14Figure14Effectofsurfactantandacidtreatmentonthesludgedewateringvelocityoffiltration(:,,,),:(1)(,),PAM,(Fe3+PAM)Fe3+,,,,,;,PAM,,,,52003225©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.(2),,,,,,,;PAM,;Fe3+CaO,,PAM(3),;,,;,,,;,313,,:,,,,,PAM,,SS,,,SSCODTP,2:SSCOD,PAM,;PAM,SSCOD,;COD2Table2SludgesupernatantqualityafterconditioningandcentrifugationSS(mg/L)CODcr(mg/L)TP(mg/L)7761416517651278124144951724107925615114310881306103122411611841244411,,,,,,,,(ECP),;,;ECP,ECP,,:,;ECP,,,,ECP,,,,,,;,,,ECP,,,,,,,,;,ECP,,,,,PAM,,Fe3+CaO,PAM62003225©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,PAM;,,,ECP,,,ECP,ECP,412,,pH,,;,,,,,,H+,,,,215,,,,ECP,,,pHpH,,:,;,,pH,,,,,,,,,,,,pH,,,(CaO),pH210215,,,,,,,,,,,,,CaO,pH,CaO,,,,,,;,,,,CaO,CaO,pH,,,,,,5:,,ECP,(,);,,ECP,(,,)72003225©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.:H+,;ECP,pH,,,Fe3+CaO,,:[1]JohnTNovak,etal.Conditioning,Filtering,andexpressingwasteac2tivatedsludge[J].J.Environ.Eng.,1999,125(9):8162824.[2]JKopp,NDichtl.Predictionoffull2scaledewateringresultsofsewagesludgesbythephysicalwaterdistribution[J].Wat.Sci.Tech.,2001,43(11):1352143.[3].[M].:,1997.3002309.[4]JRuhsingPan,CHuang,CGangFu.Effectofsurfactantonalumsludgeconditioninganddewaterability[J].Wat.Sci.Tech.,2000,41(8):17222.[5]YinguangChen,HaizhenYang,GuoweiGu.Effectofacidandsurfac2tanttreatmentonactivatedsludgedewateringandsettling[J].Wat.Res.,2001,35(1