MBBR工艺处理化工废水中试研究楼洪海

MBBR楼洪海　王　琪　胡大锵　张世新(,310012)　根据某化工污水的水质水量特点,采用预处理+AO+MBBR工艺,在试验期间发现该工艺不但能够稳定去除COD,且能高效的去除凯氏氮,去除效率能够达到95%以上,并且对后段的MBBR工艺的填料进行了跟踪监测,未发生钙离子的沉积,因而不会对系统产生影响。　化工废水　钙离子　MBBR工艺　高浓度凯氏氮　　AOO,,,,Ca2+、S2-。,,MBBR,,。1　1.1　原水水质,1。,,,TKN120～220mgL。　　1　mgL(pH)CODBOD5SSTKNCa2+S2-pH1010≥606≤7080～100300～50060～707～81.2　工艺流程及主要装置AOO(1),AO,,14400m3d。2,100Lh,24h。1　、MBBR2　　　,MBBR,,。、2。2　2.1　启动及运行条件20074,,。MBBR,2　、0.6m×0.6m×1.5mFeSO4,NaHCO30.6m×0.6m×1.5m0.9m×0.9m×1.5m0.9m×0.9m×1.5mMBBR2.5m×0.5m×1.5mB-Cell0.5m×0.5m×1.5mNaHCO3,。,61　　　200812266DOI:10.13205/j.hjgc.2008.06.018,,。,MLSS4832mgL,MBBRMLSS5091mgL。DO0.5mgL,DO2～3mgL,MBBRDO3～4mgL,pH7.4～7.5,[1-2]。2.2　预处理效果FeSO4,NaHCO37.7,Ca2+,S2-。Ca2+300mgL,S2-1mgL。S2-,S2-,Ca2+,,。2.3　COD去除效果,COD1000mgL,,,COD,,CODTKN6.6[2],ρ(COD)ρ(TKN)4.5～8.3,69%。COD,COD100mgL。320078—9,COD40～80mgL,93.3%,《》(GB8978-1996)。3　COD2.4　氨氮去除效果420078—9,120～220mgL,95%,。MBBR,,,,0.018kg(kg·d)。20079,8,。1—;2—;3—;4—。4　2.5　MBBR池填料钙离子分析,Ca2+[3],,,,,O。Ca2+,MBBRCa2+。52.13%,71.89%,91.04%。Ca2+,MBBR,Ca2+。。3　(1),S2-,Ca2+,,。(2)100Lh,COD1000mgL,COD80mgL,COD93.3%,。(3)MBBR,95%,0.018kg(kg·d)。(4)MBBR,,。[1]　..:,2006:210[2]　,,..:,2002:376-381[3]　..,2001,32(1):45-47　　310012　478C-406　　(0571)878967772007-12-0362　　　200812266showedthattheimprovedmethodwassimpleandimplementedeasily.Theaccuracyofthemethodwashighandthedeterminingresultscouldre-flectbasicallythedegreeofpollutioncausedbytheoxygen-demandingorganicmattersinsediment-ladenwater.Keywords　sediment-ladenriver　COD　monitoringmethod　improvingPILOT-SCALETESTONTREATINGTHECHEMICALWASTEWATERBYMBBRPROCESSLouHonghai　WangQi　HuDajiangetal(61)………………………………………………………………………………Abstract　Accordingtothefeaturesandquantityofachemicalwastewater,pretreatment-AO-MBBRprocesswasadopted.Inthecourseoftesting,notonlytheCODcouldberemovedsteadilybutalsotheTKNcouldberemovedefficiently,theremovalefficiencywasmorethan95%bythisprocess.AndatracemonitoringofCa2+inthefillingsoftheMBBRtankwasdoneandadepositionofCa2+didnothappen,sothesystemwasnotinfluenced.Keywords　chemicalwastewater　Ca2+　MBBRprocess　highconcentrationTKNAEROBICACTIVATEDSLUDGEGRANULATIONANDITSCHARACTERISTICSINACONTINU-OUS-FLOWCOMPLETELYSTIRREDTANKREACTOR(CSTR)ShenYaoliang　LiYuan　SunLizhu(63)…………………………………………………………………………………………………………………………………Abstract　Thelaboratory-scalestudywascarriedoutonthegranulationandcharacteristicsofaerobicactivatedsludgeinacontinuous-flowcompletelystirredtankreactorwithacetatesasthecarbonsourceandapreparedwaterbynutrientsandothermicro-elementsasrawwater(COD=150～500mgL,pH=6～7),whichwasinoculatedwithactivatedsludgefromamunicipalwastewatertreatmentplant.Theresultsshowedthatthestramineousaerobicgranulesludgeof1～5mmindiameter(average2～3mm)wasformedafter20doperationatnormaltemper-ature(25～30℃).ThegranulationwasaccomplishedviasuchconsecutiveprocessesasEPSself-flocculation,filamentousbindingandattachmentamongthesmall-sizedgranules,andfourstepsincludinginnernucleusformationandflocculation,granuleformationandmaturationwerefoundduringtheaerobicsludgegranulation.Thereactorwasoperatedstablyandefficiently,andtheremovalratesof85%～90%,90%and50%～70%forCOD,NH+4-NandPO3-4-PrespectivelywereobtainedundertheconditionsofHRTbeing2.82handorganicloadingrate4.24kg(m3·d).Theaerobicgranulesshowexcellentsettlingperformancewithsettlingvelocityof30～58mh.Keywords　completelystirredtankreactor　activatedsludge　aerobicgranulesludge　characteristicsTHESTUDYONTREATMENTOFPAPER-MILLMID-STAGEWASTEWATERBYHYDROLYTICACIDIFICATION-ACTIVATEDSLUDGEPROCESSZhangBeiping　LiWei　LuXiejuanetal(67)………Abstract　Thehydrolyticacidification-activatedsludgeprocesswasusedtostudypulp-millmid-stagewastewater,whichwascharacterizedbyhighconcentrationofCOD,withanemphasisontheeffectandparametersofhydrolyticacidificationandactivatedsludgeprocess.Experimentalresultswereshownasfollows:whenthetemperaturewasunder40℃andhydraulicretentiontime(HRT)was10h,theremovalrateofCODwasabout34%.Thetechnologicparametersofthelateractivatedsludgewere:hydraulicretentiontimewas12h,theDOofthemixedliquidwas4mgL,theremovalrateofCODwasabout80%.Asaresult,CODintheeffluentcouldmeettheemissionstandardspecifiedby“WastewaterPol-lictantEmissionStandardofPapermakingIndustry”(GB3455-2001).Butwhenthetemperaturewashigherthan40℃,theremovalrateofCODinthemid-stagewastewaterwasabout55%.Theeffluentcouldnotmeettheemissionstandard.Keywords　mid-stagewastewater　hydrolyticacidification　activatedsludgeprocessTECHNICALANDECONOMICALCOMPARISONOFWATERCOOLINGSYSTEMOFBLASTFURNACEWangLing　ChenJiliang(71)……………………………………………………………………………………Abstract　Taking2500m3blastfurnaceasexample,technicalflow,characteristicandeconomicalbenefitofrecycledwatercoolingsystemareanalyzed,anditisproposedtouseclosedrecycledsoftwatertechnicsandevaporatedaircoolingequipmentseparately,whichisimportanttosavewaterandenergyinironandsteelplants.Keywords　boilfurnace　separatedclosedsoftwatercirculationcoolingsystem　cleanopen-cyclewater　evaporativeaircooler　plateex-changer　economicbenefitCOMPARISONANDCHOICEOFFLUEGASDESULFURIZATIONPROCESSESLiaoChuanhua　ZhouLing　ZhuTingfengetal(74)…………………………………………………………………………