/O—A—O刘廷志, 田胜艳(天津科技大学材料科学与化学工程学院,天津300222) : 氨氮的去除是焦化废水处理工程的关键。在浙江某焦化厂废水处理工程中,采用高效微生物(HSB菌种)与O—A—O处理工艺相结合,在不外加碳源情况下将废水中的氨氮从600~800mg/L降到15mg/L以下,氨氮去除率为95%~98%,总脱氮率80%,并且出水COD基本维持在100mg/L以下,达到了《污水综合排放标准》(GB8978—1996)的一级标准。 : 焦化废水; 生物脱氮; O—A—O工艺:X703.1 :C :1000-4602(2005)04-0079-03HighSolutionBacteria(HSB)/O-A-OProcessforTreatmentofCokingWastewaterLIUTing-zhi, TIANSheng-yan(SchoolofMaterialScienceandChemicalEngineering,TianjinUniversityofScienceandTechnology,Tianjin300222,China) Abstract: RemovalofNH3-Nisthekeytocokingwastewatertreatmen.tHSB/O-A-OwasusedforwastewatertreatmentinacokingplantofZhejiang.Undertheconditionwithoutexternalcarbon,NH3-Nconcentrationwasreducedfrom600-800mg/Ltolessthan15mg/L,withremovalrateof95%-98%andtotalnitrogenremovalratemorethan80%,effluentCODwaskeptatnomorethan100mg/L,cominguptoI-classcriteriaspecifiedinIntegratedWastewaterDischargeStandard(GB8978—1996). Keywords: cokingwastewater; biologicaldenitrification; O-A-Oprocess 、、、、、、,CODNH3-N,BOD5/COD0.2~0.4[1],。,15mg/L。,55×104t/a,25m3/h,40m3/h。,,。1 原水水质:COD1500~3500mg/L,800mg/L,600mg/L,SCN-300mg/L,SS500mg/L,30mg/L,pH9~10。2 工艺流程O—A—O,,。,,;,、COD。1。1200m3/d,50m3/h(20%,60m3/h)。(1),360m3,HRT6h,4~6mg/L;(1),7921 420054 CHINAWATERWASTEWATER Vo.l21No.4Apr.20051200m3,HRT10h,1.2kgCOD/(m3d);I(1),480m3,HRT6h,4~6mg/L,2.2kgCOD/(m3d)、1.2kgNH3-N/(m3d);(1),100m3,HRT2h,2.88kgNO-3-N/(m3d);II(1),200m3,HRT4h,4~6mg/L,1.8kgCOD/(m3d)、0.45kgNH3-N/(m3d);:30~45℃。1 Fig.1 Flowchartoftreatmentprocess3 污泥培养及驯化(HSB)。HSB,40100,,。1。1 Tab.1 EndurablecapacityofhighsolutionbacteriatopolluantsmgL-1CN-20300SCN-36400NH32005000NO-3500015000NO-236400S2-150500010010001502000600020000502000.110030200 ,,,,2。,,COD。2 Tab.2 Proportionforaddingmicrobesandcarrier%III22222.52.5 C∶N,40m3,C∶N,,3。。40m3/h,6m3/h,,40m3/h。3。3 Tab.3 Rateofinfluxduringdomesticationm3h-1161811712012513028681116182022343229242220184 实际运行与控制4.1 (、),(、),。COD:,、,;,COD,,,。,1~1.5mg/L、COD50%~60%,、。4.2 ()。,,。,COD200~300mg/L,。pH,7.5~8.0;804 21,COD300mg/L,,。COD,,COD。4。4 Tab.4 Functionparameters/℃25~3525~3525~35pH6.5~8.07~7.87.5~8.0SV30/%12~1515~2515~25/(mgL-1)1~1.50.52~41∶21∶(4~5),/(mgL-1)600155 处理效果及费用6、,:COD100mg/L,NH3-N15mg/L,0.5mg/L,0.5mg/L,SS50mg/L,pH9~10。COD,。,COD。,,COD90%,。(、),。,580,DCS100,2.8/m3()。6 讨论① ,,,;、、、(10%)。② ,、,COD,,。③ ,,;:,H+,,1g7.57g[2],OH-,,。,(30%~45%);,。,,BOD550mg/L,。,,,。,,。,,,,1∶6,。,。④ ,,,。,,,,99%。:[1] ,,.[J].,2001,22(4):86-90.[2] ,,,.[J].,1995,28(5):69-74.:(022)81575812 60270059 60270046E-mail:liutzhi@sina.com:2004-10-09814 ,:/O—A—O 21