ApproachonthecharacteristicsandthebestrunningparametersofbrewagewastewatertreatmentbyusingmodifiedCASSTianLijiang,ZhangJie,WangLiping(SchoolofEnvironmentandSpatialInformatics,ChinaUniversityofMiningandTechnology,Xuzhou221116,China),,(,221116)[]CASS,。,CASS,CODCr98%,MLSS3000mg/L,λ=1/2,CODCr20~30mg/L;λ=1/2,1hCODCr96%;2h,CODCr39.98mg/L,CODCr95.84%。CASS、。[]CASS;;[]X703.1[]B[]1005-829X(2008)11-0039-04Abstract:Theexperimentalequipmenthasbeenmodifiedonthebasisofcyclicactivatedsludgesystem(CASS).SomeresearcheshavebeendonetovalidatethemodifiedCASS’scharacteristicsandthebestrunningparametersfortreatingthebrewagewastewater.TheresultsshowthatitsCODCrremovalefficiencycouldreach98%.WhenMLSSis3000mg/L,thedrainageproportionλ=1/2,outputCODCrisbetween20and30mg/L.Whenλis1/2,therunningcycleofutmostrunningtreatmentconditionis1h,itsaverageremovalefficiencyreaches96%.Whentheaerationtimeis2h,itsoutputaverageCODCris39.98mg/L,andaverageremovalefficiencyis95.84%.Itisfoundthatthetreatmentefficiency,adjustabilityandeconomicsuperiorityofthemodifiedCASSprocessareveryobvious.Keywords:modifiedCASSprocess;brewagewastewater;wastewatertreatmentCASS,,。,、pH,CASS,,,,〔1~3〕。,,,,,,pH,,,〔1,4〕。11.18mm,、,(L×B×H)60mm×250mm×390mm、340mm×250mm×370mm、384mm×250mm×370mm,5.85、28.95、31.10L,1∶5∶5.3。。,2811200811IndustrialWaterTreatmentVol.28No.11Dec.,200839。。1。,,,,,,。,。1.2(),NH4ClK2HPO4、KH2PO4,m(BOD)∶m(N)∶m(P)=100∶5∶1,CODCr1000~1500mg/L,pH6.5~8.5,20~30℃,DO2.0mg/L〔1,5〕。1.3CASS,,、,()。:、,MLSS;;;。22.1、,,5h,4h,,、1h。1/2,15.55L,0.52L/min。8d,4,CODCr600~1500mg/L,pH7~8,MLSS6000mg/L。CODCr20mg/L,。30,,SV3050〔5,6〕。,,,。5h,4h,,,〔6〕。2,,CODCr1500mg/L600mg/L,CODCr20mg/L30mg/L,98%94%。,,,,。,CODCr600mg/L,1000mg/L,pH8,MLSS3000~3300mg/L。,CODCr60mg/L,45mg/L,CODCr32.13mg/L,CODCr44.31mg/L,。,,。SV3038~45,。MLSS,。,〔6~8〕。2.2CASS,,λ1/21/3。Q=31.1/3=10.43L,5.18L,V=10.43L/30min=0.35L/min,MLSS3000mg/L。3。3,CODCr500~1000mg/L,pH8。CODCr2008-11,28(11)12341CASS1—;2、3—;4—16001200800400012345678100806040200CODCr();CODCr();CODCr();CODCr();();()/dCODCr/%CODCr/(mg·L-1)2CODCr4020~30mg/L,94%~98%。,CASSCODCr20mg/L,CODCr。,,,1/2,1/3。2.3,,,。:MLSS3000mg/L,CODCr1000mg/L,。pH5~7。4h,3h,,0.5h,、1h,λ=1/2。4。4,CODCr1000~1300mg/L,CODCr40mg/L,CODCr96%。,SV3035~44,,,〔6,8〕。2.4,,3h,2h,λ=1/3,MLSS3500~4000mg/L,5。5,CODCr947.52mg/L,pH5~7。CODCr39.98mg/L,。CODCr94%~98%。,,5.18L。,CODCr0.65kg/(kg·d)〔8〕。,BOD5/CODCr=0.75,BOD50.488kg/(kg·d),0.5kg/(kg·d)。3,CASS,,,,。:(1)CASS,,5~6h,4~4.5h,λ=1/2,5000~6000mg/L。,、1h。(2),,4h,3h,λ=1/2,MLSS3000mg/L。(3)CASS,3h,2h,λ=1/3,3500~4000mg/L。120010008006004002000123456781007550250CODCr/%CODCrCODCrCODCr/(mg·L-1)/d35h,4h,λ=1/3,:CASS2008-11,28(11)53h,2h,λ=1/31400120010008006004002000123456CODCrCODCr1007550250CODCr/%CODCr/(mg·L-1)/d140012001000800600400200012345CODCrCODCr1007550250CODCr/%CODCr/(mg·L-1)/d44h,3h,λ=1/241ExperimentalstudyonphosphorusremovalofrecycledwaterbycoagulatingsedimentationLiZhu1,ChenHui2,XuDeqian2(1.ShenzhenPlanningandDesignInstituteofWaterResources,Shenzhen518036,China;2.SchoolofCivilEngineering,HefeiUniversityofTechnology,Hefei230009,China)1,2,2(1.,518036;2.,230009)[](PAFC)(PAC)。:PAFCPAC、,PAFCPAC80、120mg/L,0.07、0.08mg/L,92.7%、91.6%;ζ,PAFCPACζ,。[];;;[]X703.1[]A[]1005-829X(2008)11-0042-03Abstract:Theefficiencyoftheremovalofphosphorusfromthe2nd-classeffluentofmunicipalsewageplanthasbeenstudiedbyusingcoagulantssuchaspolyaluminiumferricchloride(PAFC)andpolyaluminiumchloride(PAC)respectively.TheresultsshowthatPAFChasbettereffectontheremovalratesofphosphorusandturbiditythanPAC.ThebestdosagesofPAFCandPACare80mg/Land120mg/L.Thecorrespondingresidualconcentrationsofphosphorusineffluentare0.07mg/Land0.08mg/Lrespectively,andtheremovalratesare92.7%and91.6%respectively.InthemeantimePAFCcouldreducetheζpotentialandimprovethereactionefficiencymorequicklythanPACthroughthemeasurationstudyofζpotential.Keywords:recycledwater;polyaluminiumferricchloride;phosphorus;coagulation,,,〔1,2〕。,!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!2811200811IndustrialWaterTreatmentVol.28No.11Dec.,2008(4),λ=1/2,,。[][1].[M].:,2002:64-67.[2]EckenfelderJrWW.[M].:,2002:346-354.[3],.CASS[J].,2003,19(2):34-35.[4].—[J].,2001,32(3):32-33.[5],.[J].,1999(6):26-27.[6],,.CASS[J].,2002,15(3):38-42.[7]HeX,SongY,WangS,etal.ApplicationofCASSintreatingdo-mesticsewageatlowtemperatures[J].JournalofChinaUniversityofMine&Technology,2001,11(2):168-172.[8]ChenG,AnK,SabyS,etal.Possiblecauseofexcesssludgere-ductioninanoxic-settling-anaerobicactivatedsludgeprocess(OS-Aprocess)[J].Wat.Res.,2003,37(16):3855-3866.[](1977—),2004,,,。:13914871949,E-mail:tljiang77@163.com。[]2008-07-11()42