高效微生物絮凝剂对造纸废水的应用研究

。、[1-2]。、、。[3]。PAC、、pH、、[4-5]。、、、、[6]。。。11.11、、M-3。2。1.21.2.11.2.1.1pH8.5。30℃160r·min-160h。8000r·min-120min40℃12221.1500902.163318M-3M-375.38%。pH=12、7mL、5mL1%CaCl298%COD59.30%96%。PACPAC0.3mL、4mL、6mL1%CaCl2、pH=1197%COD67.10%95.18%。TQ314.253X703.1A1000-3770(2009)07-[e-mail]/mg·L-1ρ(NH4+-N)/mg·L-1/244815.662001Table1Table1Waterqualityofrawwastewater35720097TECHNOLOGYOFWATERTREATMENTVol.35No.7Jul.,200992。2g·L-1。1.2.1.2。－[7]。Molish、、Feling、Seliwanoff。1.2.21。100mL80mL6mL1%CaCl210mL100mL250mLpH9200r·min-180r·min-1。2。100mL80mL6mL1%CaCl2100mL250mLpH9200r·min-10.5min80r·min-12min15min。3。CaCl2。4pH。pH。5。。6。PAC5%PAC、pHPAC2、pH2。22.1－75.38%。Molish、。2.2.2。280%～90%。B90%200r·min-10.5min80r·min-12min。2.3、、1。16mL。ξξ。6mL91.9%。1CaCl2/min/%ABCDEF0.50.51.01.01.01.01.52.02.02.01.52.584.088.979.588.380.983.22Table2Effectofstirringvelocityontreatingeffect024681012020406080100

/mL1、Fig.1Effectofflocculants,assistantflocculantsontreatingeffect357106mLCaCl26mLCaCl2。Ca2+。CaCl2。6mL88.8%。2.4pHpH2。2pH。pH12pHpH11pH11。2.53MBF、1%CaCl2、pH。34。1。4pHpH。2pH127mL1%CaCl25mL98%COD59.30%96%COD[8]。2.62.6.1PACPACpH34。33Table3FactorsoforthogonaltableV(MBF)/mLV(CaCl2)/mLpH123567567101112/mL/mLpH1)/%COD/mg·L-1COD/%ρ(NH4+-N)/mg·L-1/%123456789K1/3K2/3K3/3R11122233384.1391.8393.008.8712312312387.2788.3393.376.112323131282.2090.0396.7314.5371.283.697.692.594.588.598.186.994.01477.3943.21087.11022.71075.81189.4996.21291.7943.239.6764.3058.9058.2056.1051.4059.3047.2061.500.8400.4060.9810.5570.5470.5000.7740.4620.69894.6495.4193.7496.4496.5196.8196.6696.0595.544Table4Analysisoforthogonalresult1)550nm。024681012020406080100

pH2pHFig.2EffectofpHontreatingeffect0.00.20.40.60.81.01.21.4020406080100
/%V(PAC)/mL3PACFig.3EffectofPACdosageonPACflocculentrate11PAC0.9mL95.9%PAC0.9mL。4pHPACPACpH。2.6.2PAC。2、pHPAC0.3mL、MBF4mL、CaCl26mL、pH1197%。COD727.3mg·L-167.10%0.755mg·L-195.18%。。3M-375.38%。PAC。2PAC、2。。[1].[J].,2008,4:134.[2].[J].,2000,11(16):23-25.[3]HSalehizadeh,MVossoughi,IAlemzadeh.Someinvestigationsonbioflocculantproducingbacteria[J].BiochemicalEngineering,2000(5):39-44.[4],,.[J].,2008,3(27):70-72.[5],,.[J].,2005,3:42-46.[6].[J].,1995,15(4):211-218.[7],,.[M].:,2003:159-160.[8]GB8978—1996.[S].APPLICATIONOFHIGH-EFFICIENCYBIOFLOCCULANTINPAPERMAKINGWASTEWATERLuYan1,2,MengLili1,QiaoFuzhen1(1.DepartmentofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.DepartmentofChemistry,DaqingPetroleumInstitute,Daqing163318,China)Abstract:Flocculant-producingbacteriawereisolatedmainlyfromtheactivatedsludge,andflocculationcharacteristicsoftheflocculant-producingbac-terianamedM-3wasinvestigated.TheresultsshowedthattheflocculantfromM-3belongedtoextracellularbiopolymericflocculants.Thecrudewaspurifiedfromtheculturebrothanditsmajorcomponentswasidentifiedaspolysaccharide,thecontentofwhichwas75.38%.Thecrudewasstudiedinthepapermakingwastewater.Thebesttreatmentconditionsweredeterminedbyorthogonaltestincludingsomefactors,suchashydraulicmixingtime,flocculantdosage,theCaCl2solutiondosageandpHvalues.Somewaterqualityindexesunderorthogonaltestweremonitoredtoevaluatetheflocculantinthepapermakingwastewatertreatment.UnderthepHvalueof12,thevolumeofflocculantsaddingto7mL,thevolumeofCaCl2solution(1%)addingto5mL,theflocculationratewas98%.theCODremovingratewas59.30%,andtheremovalammonia-nitrogenreachedabove96%.Combina-tionofbioflocculantandtraditionalflocculantswasalsoresearchedinthetext,anditachievedgoodresultsbytakingPolyaluminiumChloride（PAC）astraditionalflocculants.Theresultsshowedthattheflocculationratewas97%,theCODremovingratewas67.1%,andtheremovalammonia-nitrogenreached95.81%,underthevolumeofPACaddingto0.3mL,thevolumeofflocculantsaddingto4mL,thevolumeofCaCl2solution(1%)addingto6mLandthepHvalueof11.Keywords:bioflocculant;papermakingwastewater;flocculationcharacteristics;waterqualityindex4pHPACFig.4EffectofpHonPACflocculentrate3579111380859095100
/%pH35712