CASS工艺在处理低温生活污水中的应用研究桑义敏

CASS＊桑义敏(,100083)　尹　炜(,266033)何绪文(,100083)　通过对CASS工艺处理低温生活污水的可行性研究,实验结果表明:CASS工艺对处理低温生活污水原水(平均浓度CODCr811.7mgL;BOD5295.7mgL;SS119.6mgL),其平均去除率分别为85.7%、95.3%、91%;CASS工艺对温度适应范围较广(气温-5～20℃),但低温时SV和SVI值普遍高于常温条件;低温有利于氧的转移,且CASS池中DO周期性变化有利于除P脱N和防止污泥膨胀。　CASS工艺　低温生活污水　应用研究　　　　　　　　＊1　,,,。(continuousinflowCyclicActivatedSludgeSystem,CASS)SBR。CASSSBR:(1),,,。(2)CASS,,,。(3)CASS13,SBR12～34,,CASS。,40(6～10℃,4～6℃)。,10℃,13℃,。CASS,。2　2.1　实验方法及流程,180L。CASS930mm×312mm×410mm,118L。PLC,,。1。1　2.2　污泥接种与培养,,,。24h,,,CASS———、,、,,,,。3　3.1　BOD5、CODCr和SS去除效果及分析BOD5、CODCrSSBOD5CODCr。16　　　20024202DOI:10.13205/j.hjgc.2002.02.004　(HRT=16h,=3h)℃mg·L-1mg·L-1BOD5CODCrBOD5CODCrSSBOD5CODCrSS-1～1021781317413.683170.260.164～123417601099.415270.450.060～732986216115116130.380.13　　,(BOD5CODCr0.36),BOD595.3%,CODCr85.7%,SS91.7%,。,BOD515mgL,BOD5CODCr0.12,,CODCr。,CODCr。,,。,,,;,,,,。,(91.7%,),SS100mgL(119.6mgL),SS10mgL(9.4mgL),。CASS,,,。,CASS,,,,CASS,。3.2　常温和低温2种条件下实验效果对比,:　20h;　4h,3h,45min,10min,5min;　87mLmin;　0.087×4×60=20.88L;　15。3.2.1　2,(10～20℃-5～8℃),(CODCr86.4mgL101.5mgL),(CODCr88.2%85.5%)。CASS,(-5～20℃)。2　CODCr3　SV、SVI3,(10～20℃-5～8℃),CASS,SVSVI(SV40.17%64.2%;SVI109.8mgL167.2mgL),。。:,,、,,350%,、,,SVSVI,。,CASS、,SVSVI。3.2.2　,17　　　20024202。,,,,,;,、。3.3　CASS工艺运行周期内溶解氧(DO)的变化规律及分析DO,CASSDO,--,,,NP,4。4　CASSDO5　CASS4,、15min,DO4.15mgL0.28mgL,(60min),,NO-3-NNO-2-NN2。N2,,,。(5),。4　(1)CASS(BOD5295.7mgL;CODCr811.7mgL;SS119.6mgL),95.3%、85.7%、91%。(2)CASS,,,CODCr3%(88.2%85.5%),CASS。,SVSVI,、、CASS,。(3)CASSDOPN;。1　,,.().:,1996.115～118.　,,197510,1999,。。。2001-07-2718　　　20024202ENGINEERINGEXPERIMENTOFTREATMENTOFTOXICORGANICWASTEWATERCONTAININGFORMALDEHYDEBYCATALYTICOXIDATIONPROCESSWuChaofeietal(7)……Abstract　Thewastewatercontainingformaldehydebelongstothetoxicorganicwastewater,anditcannotdirectlybedisposedbybiologicalmethod.SotheassembledtechniquesincludingthecatalyticoxidationwithFentonreagentandthefiltratewithactivecarbonweredesignedowingtothewastewatertreatmentengineeringforformaldehydeproducedbytheglue-washingprocessofGuangzhouZhujiangPianoManufactoryandaccordingtothecompositionofthewastewater.Eachoperatingparameterwasdeterminedbyboththecontrastiveexperimentandthesinglefactor'sexperiment,thenwastestedthroughtheengineeringscale'sreactor.Afteritwastreatedtothetoxicorganicwastewatercontainingformaldehyde,itsCODCrandtheremovalrateofformaldehydecanbeupto76%and96%respectively,andtheremovalrateofchromaisuptoover99%.Later,itwasanalyzedbrieflytothecorrelatedinfluentialfactorsofthecatalyticoxidationwithFentonreagentappliedtotheglue-washingwastewaterintheprocessofpracticalengineeringtreatment.Keywords　organicwastewatercontainingformaldehyde,FentonreagentandcatalyticoxidationAPPLICATIONOFNUMERICALMODELINGMETHODTOTHEOPTIMIZEDDESIGNOFTHETWO-DIMENSIONALSEDIMENTATIONTANKZengGuangmingetal(10)………………………………………Abstract　Thispaperdiscussedtheapplicationofthenumericalmethodtothecalculationoftheconcentrationdistributionfieldofthesuspendedsolidinthesedimentationtank.Withthehelpofthenumericalmodelingarelationshipbetweenthesedimentationefficiencyandthesizeofthesedimentationtankwasestablished,whichcanbeusedasthebasisfortheoptimizeddesignofthesedimentationtank.Thefeasibilityandtheadvantageofthenumericalmethodwereverifiedwithapracticalexample.Keywords　numericalmodeling,sedimentationtankandoptimizeddesignSTUDYONPURIFYINGMINEWATERTHROUGHAERATIONZONEINSANDIFICATIONAREA:ACASESTUDYINDALIUTAMINEAREA,SHENMU,SHANXI,CHINANieZhenlongetal(13)………………………………………………………………………………………………………………………………………Abstract　Usingminewaterasaresourcecanassuagethecontradictionbetweenwatersupplyandwaterdraininaminearea.InviewofthecharacteristicsoftheaerationzoneandtheminewaterinDaliutaCollieryArea,Shenmu,wehavedonesomeindoorexperimentswithsandcolumn.Thispaperdiscussesthefeasibilityofpurifyingtheminewaterthroughtheaerationzoneinasandificationareaanditspurificationcapacity.Keywords　sandificationarea,aerationzone,minewaterandpurificationcapacityAPPLICATIONOFCASSPROCESSTOHYPOTHERMALDOMESTICSEWAGETREATMENTSangYiminetal(16)………………………………………………………………………………………………………………Abstract　ThefeasibilityofCASSprocessinhypotehermalsewagetreatmentwasinvestigatedinthispaper.Theresearchresultsindicatedthatasfordomesticsewagetreatmentinlowtemperature(ontheaverage,inflowCODCrwas811.7mgL;inflowBOD5was295.7mgLandSSwas119.6mgL),theaverageremovalrateswere85.6%,95.3%and91%respectively.CASSprocesscanworkinalargerangeoftemperature(about-5～20℃),butSVandSVIarehigherinlowtemperaturethanthoseincommontemperature;lowtemperatureisgoodforoxygentransmissionandDOcyclicfluctuationisgoodforprotectingsludgefrombulking.Keywords　CASSprocess,hypothermaldomesticsewageandapplicationresearchIMPROVINGEFFICIENCYOFBIOCHEMICALEQUIPMENTFORTREATINGWASTEWATERCONTAININGPHENOLANDCYANOGENShiHongwenetal(19)…………………………………………………Abstract　Theimprovementontheefficiencyofthebiochemicalequipmentbyputtingglucoseinittotreatwastewatercontainingphenolandcyanogensinagasplantwasintroducedinthisarticle.Themechanismwasanalyzedanddiscussed.Keywords　wastewatercontainingphenolandcyanogen,biochemicaltreatment,efficiencyandgluco