BAF投加CP源深度处理焦化废水去除COD的可行性研

IBAFCPCODCODcrNH3-NCPCODCPCPCODCOD310.05m3/m2·d~0.1m3/m2·d3131pH7.0~8.0COD165~185mg/L25~35mg/LCOD86.431mg/LCOD89.443mg/LCOD75.157%NH3-N99.069%KH2PO4P0.025g/l0.05g/l0.1g/l0.15g/lPPCODNH3-NTPNH3-NKH2PO40.1g/lCOD104.155mg/LIICOD43.92%NH3-N97.35%TP72.473%C0.125g/l0.25g/l0.5g/lCC0.25g/lCODCOD66%COD98mg/lNH3-N92.084CPCPKH2PO40.1g/l0.25g/lCOD86.431mg/LCOD89.443mg/LCOD75.157%NH3-N99.069%CPNH3-N11NH3-N1mg/lCPGB189182002COD100mg/LNH3-N25mg/LCPCODIIITHEFEASIBILITYSTUDYOFCODIN-DEPTHREMOVALFROMTHECOKEPLANTWASTEWATERINBAFBYADDINGCPNUTRITIONABSTRACTThecomponentsareverycomplexincokeplantwastewater,inwhichcontainsrefractoryorganiccompounds,andgreatchangesusuallyhappentowaterqualityandwaterflow.Itisatypicalindustrialwastewater,inwhichcontainsanumberoftoxicandnocuouscompounds.Butmostofthetraditionaltreatmentprocesseswereconventionalactivatedsludgemethod,throughwhichtheremovalofCODandammonianitrogenisnotfavorableandtheeffluentconcentrationcouldn’tattainthewastewaterdrainagelevel,whichwillcausesevereharmtoourenvironmentandhumanbody.Onthetraditionalfoundationofthescorchfactory,therefore,itisnecessarytoincreaseareasonabledepthhandlingtomakeuselesswaterattainthewastewaterdrainagelevel,whichisakindofeconomictechnology.ResearchshowsthatitisfeasiblethatbiologicalaeratedfilterwhichisaddedCPnutritionisusedtoin-depthremoveCODofthecokewastewaterwhichdoesnotmeetstandards.TestbyaddingC,PnutritionmethodtostudyiftheC,PnutritionisthemainfactorsofCODin-depthremovalfromthecokeplantwastewaterandthattheeffluentofoutwaterCODbyexperimentalcanmeetthenationaldischargestandards.Theexperimentalresultsshowthat:byaddingC,Pnutrition,whentheanoxicandaerobicheightratiois3:1,hydraulicloadingis0.05m3/m2•d~0.1m3/m2•d,gas-waterratiois3:1,watertemperaturearound31,PHbetween7.0~10,therawwaterCODis165~185mg/L,ammoniais25~35mg/Linthecase,outowaterCODcanreachthelowest86.431mg/L,averageeffluentIVCODupto89.443mg/L,CODaverageremovalrateupto75.157%,NH3-Naverageremovalrateupto99.069%.TheexperimentaluseKH2PO4asPnutrition,studyofthetheeffluentaboutoutowaterwhenaddPnutritioonlyunderthequantityof0.025g/lofrawwater,0.05g/lofrawwater,0.1g/lofrawwater,0.15g/lofrawwater.Theexperimentalresultsshowthat:therehavenoobviousrelationshipinconstraintsbetweenhowmuchPnutritionaddedandCODremovalrate,butimpactofNH3-NandTPremovalefficiencydirect.WhenthedosageofKH2PO4is0.1g/lofrawwater,theoutowaterqualityreachthebest.AverageeffluentCODis104.155mg/L,CODaverageremovalrateupto43.92%,NH3-Naverageremovalratereach97.35%,TPremovalratereach72.473%.TheexperimentaluseamylaceumasCnutrition,studyofthetheeffluentaboutoutowaterwhenaddCnutritioonlyunderthequantityof0.125g/lofrawwater,0.25g/lofrawwater,0.5g/lofrawwater.Theexperimentalresultsshowthat:Whenthedosageofamylaceumis0.1g/lofrawwater,theoutowaterqualityreachthebest.CODremovalratecanreach66%ormore,andthelowesteffluentCODreduceto98mg/l,NH3-Naverageremovalratereach92.08%.TestswerealsochosenfourkindsofC,Psourcescombineddosageform,studyofthetheeffluentaboutoutowaterwhenaddCPnutritioatthesametime.Theexperimentalresultsshowthat:WhenthedosageofKH2PO4is0.1g/lofrawwater,dosageofglucoseis0.25g/linrawwateroutowaterCODcanreachthelowest86.431mg/L,averageeffluentCODreach89.443mg/L,CODaverageremovalrateupto75.157%,NH3-Nremovalrateupto99.069%.ThisshowthatC,PsourcefortheTreatmentofCokingWastewatertechnologyplayedavitalrole.Inthetested,ifthereiseffluentNH3-Nconcentrationincreasedinthecase,weadditionofawaterrecycleplantwhichrefluxratiois1:1.NH3-NeffluentVconcentrationdroppedto1mg/llessinafewdays.Inthisresearch,byaddingasmallamountofC,PnutritionsourceinthedepthtreatmentofthecokewastewatercouldmeetthenationalstandardleveltwoinDischargestandardofpollutantsformunicipalwastewatertreatmentplant(GB189182002).TheconcentrationofCODwaslessthan100mg/Landofammonianitrogenwaslessthan25mg/L.Thiscraftiseconomicandfeasibleintechnology.KEYWORDSbiologicalaeratedfilter(BAF)thedepthtreatmentofthecokewastewateraddingCPnutritionchemicaloxygendemand(COD)XThecorrespondingmeaningofthesigns12NH3-NNH4+-N3CODCODCr4DOmg/L5TPmg/L6T7HRTh8pHpH11.120001218420093.45200810.5%108091-10809Fig.1-1China'scokeproductionforthe08,09Comparison40%199844%08091“”3500211.18m31.83m320109440~14640m3COD25004500mg/L4001000mg/L1-1Tab.1-1ThenationalstandardsCODNH3-NTPB6081510.5GB18918-2002100253030.5AOA2OA2O2HGT3923-2007CODcr≤80mgL≤1000mgL≤5000mgL3208090[1]A-OCODNH3-N132.813.593%~94%NH3-NCODCODGB189182002COD100mg/LNH3-N25mg/L1.21.2.1CPCPCODCOD1.2.21PPCOD2CCCOD3CPCP4CP42.12.1.1[2][3]1CODNH3-N234COD567COD82.1.2[4][5]5160.08%9.84%13.47%80%50.13%~1.26%16.61%2.1.3[6][7][8]1244BAP22-12-1[9]Table2-1Themainpollutantsconcentrationincokeplantwastewater(mg/L)BOD(mg/L)COD(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)(mg/L)150~20015004000~6000200~50010~25-50~70120~350-200~1200015005000~8000------300~600-1000~2500100~250100~5001~2100~200-100~300-700~1000200~350100~200-20~5050~10010()350-350~2500-50~750200~4005~3035~85-30---5~10----10--5~101-0.7~320~30-10--20~401~5-5~1020~40-3NH3-N64GB189182002COD100mg/LNH3-N25mg/LCOD5BOD5/CODCr0.30.42.1.41[