不同时期垃圾渗滤液两级UASB_A_O_SBR工艺深度脱氮_吴莉娜

第40卷第6期2010年11月东南大学学报(自然科学版)JOURNALOFSOUTHEASTUNIVERSITY(NaturalScienceEdition)Vol.40No.6Nov.2010doi:10.3969/j.issn.1001-0505.2010.06.041不同时期垃圾渗滤液两级UASB-A/O-SBR工艺深度脱氮吴莉娜王淑莹彭永臻宋燕杰刘牡(北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124)摘要:应用两级上流式厌氧污泥床(UASB)-缺氧/好氧(A/O)-序批式反应器(SBR)深度处理早期和晚期垃圾渗滤液.首先在一级UASB(UASB1)中实现反硝化,在二级UASB(UASB2)中通过产甲烷降解有机物,在A/O反应器的好氧区进行NH+4-N的硝化,最后在SBR中去除残余NH+4-N及通过反硝化去除NO-2-N和NO-3-N深度脱氮.试验结果表明:早期渗滤液ρ(COD),ρ(TN)和ρ(NH+4-N)分别为14.8,1.8和1.3mg/mL,最终出水ρ(TN),ρ(NH+4-N),ρ(NO-2-N)和ρ(NO-3-N)分别为28,4,3.4和1.9mg/L,获得了大于98%的TN和NH+4-N去除率.晚期渗滤液ρ(COD)为2.5mg/mL;ρ(TN),ρ(NH+4-N)分别为3.0和2.9mg/mL时,获得99%以上的TN和NH+4-N去除率.最终出水ρ(NH+4-N),ρ(NO-2-N)和ρ(NO-3-N)都小于10mg/L,最终出水ρ(TN)为26～32mg/L.关键词:垃圾渗滤液;脱氮;短程硝化;UASB;A/O;SBR中图分类号:X703.1文献标志码:A文章编号:1001-0505(2010)06-1342-06AdvancednitrogenremovalvianitritefromyoungandmaturelandfillleachatebytwostageUASB-A/O-SBRprocessWuLinaWangShuyingPengYongzhenSongYanjieLiuMu(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China)Abstract:Acombinedprocessofatwo-stageup-flowanaerobicsludgeblanket(UASB),ananox-ic-aerobic(A/O)reactorandasequencingbatchreactor(SBR)wasusedtotreatfreshandmaturedlandfillleachate.Theoperationalmodeoftheprocesswasasfollows:denitrificationtookplaceinthefirststageUASB(UASB1);thechemicaloxygendemand(COD)wasmainlyremovedinthesecondstageUASB(UASB2)bymethanogenesis;theammoniumnitrogenwasremovedbypartialnitrificationintheaerobiczoneofA/Oreactor;theresidualammonianitrogenwasremovedinSBR;andthenitriteandnitratewhichwasproducedbythenitrificationwasalsoremovedinSBR.TheexperimentresultsshowthattheCOD,TNandNH+4-Nconcentrationsoffreshleachatearea-bout14.8,1.8and1.3mg/mL,respectively;theTN,NH+4-N,NO-2-NandNO-3-Nconcentra-tionsoffinaleffluentleachateare28,4,3.4and1.9mg/L,respectively;andtheTNandNH+4-Nremovalefficiencyaremorethan98%.MeanwhiletheCOD,TNandNH+4-Nconcentrationsofma-turedleachateare2.5,3.0and2.9mg/mL,respectively;theTNandNH+4-Nremovalefficiencyaremorethan99%;theNH+4-N,NO-2-N