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:2006-09-15:(20022007):(1979—),,,.:1671-2021(2007)05-0836-05UASB李 璐,傅金祥,宋 奇,孙文章(,110168) :分析低温条件下UASB厌氧反应器内挥发酸居高不下的原因和掌握降低挥发酸的有效措施.采用动态小试试验,处理高质量浓度的COD(约4000mg/L)有机废水,分析挥发酸累积的原因.在低温下控制适当的进水碱度、微量金属元素、回流比、有机负荷,即能使出水挥发性脂肪酸(VFA)质量浓度低于400mg/L,不致产生挥发酸的积累.低温下UASB反应器内挥发酸质量浓度可以得到有效地控制,反应器能稳定高效地运行.:UASB;;(VFA);:TU991.2 :A UASB[1].COD、pH,,.,.UASB,[2-5],.,.,UASB,.1 1.1 UASB90mm,2.36m,15L,12L.UASB,,,.1.2 12.1 g/L KH2PO4MgSO4·7H2OFeSO4·7H2OCaCl2()80141.6411.52 g/LZnCl2(NH4)Mo7O24·4H2OAlCl3CuCl2HBO3CoCl2·6H2ONiCl2MnSO4·H2O55555555 ,ρ(COD):ρ(N):ρ(P)=200:5:1、200709235 ()JournalofShenyangJianzhuUniversity(NaturalScience) Sep. 2007Vol.23,No.5,.COD,COD0.1mL,NaHCO3.1.3 ,UASB,COD4000mg/L、0.85L/h、HRT14.1h,(VFA),VFA.1.4 CODHH-5;pHTPX-90ipH;-,CaCO3mg/L;VFA;.2 VFAUASB,,.VFA———,,,pH;pH,.VFApH“”.VFApH1.1 VFApH 111℃,COD4000mg/L,VFA,800mg/L,1800mg/L,,pH7.3~7.8,3dpH6.2.,COD2100mg/L.pH,pH,.400mg/L,,400mg/L,、COD.VFA,VFA.2.1 ,(2).VFA.16~8℃,,13℃625mg/L.COD,13℃65.4%.,,VFA,,COD;,,VFA.2 CODVFA2.2 [3]UASB,NH4+(HCO3-).VFA,23 :UASB837 .NH4+VFApH,VFA,,,pH..,H2pH,.2.3 ,Fe、Co、Ni、Zn、Cu、Mo、Se.[4],Fe、Co、NiMn[6].,[6],:NiFe,(Methanosaeta)(Methanosarcina).NiCo[6].,,..2.4 ,,0.7L/h0.8L/h,ρ(COD)4000mg/L,COD6.5kg/(m3·d).COD(5.5kg/(m3·d))15℃,,,,,,,,VFA.VFA.3 ,,,.,,.3.1 [7],,3d,、COD、pH、VFA,7,.3 VFApH 3VFA、pH,.,VFA,pH.,pH0.26~0.44.3500mg/L,VFA726mg/L,3000mg/L,,VFA.VFA、.3.2 ,,.,.(1),.,2500mg/L,3(a,b,c)4. .a(50L200ml),ZnCl2,2mg/L.b250ml,2.5mg/L,c300ml,3mg/L.a、b9℃,c838 ()234 8℃,1℃.4,cb1℃,cb,.C,VFA620mg/L,79%.,a,b,c.Speece,,2,[6].VFA.3.3 ,.,20%,40%,60%,80%,100%,120%,150%,200%8,3d,COD、pH、VFA,3,.5.5 5VFA,20%200%,COD,VFA,.CODVFA60%,,80%,100%71%,VFA828mg/L.80%,,,,VFA.120%,,,VFA,.100%.3.4 ,,,(6). 2.6m/d,COD3000mg/L,COD5.6kg/(m3·d)4.2kg/(m3·d),,COD75%,VFA23 :UASB839 400mg/L.VFA.6 CODVFA4 (1),2530mg/L.(2),VFA.(3)100%VFA,. (4),VFA.:[1] ,,.UASB[J].:,2006,22(1):133-136.[2] BlaszczykR,GardnerD,KosaricN.Responseandre-coveryofanaerobicgranulesfromshockloading[J].WatRes,1994,28:675-680.[3] RaghudaL,JukkaR.Extremethermophilic(70℃),VFA-fedUASBreactor:Performance,temperatureresponse,loadpotentialandcomparisonwith35and55℃UASBreactors[J].Wat.Res.1999,33:3162-3170.[4] HerbertHPF,YuYL,HoKwongChui.UASBtreat-mentofwastewaterwithconcentratedWixedVFA[J].JourMalofEnvironmentalEngineering,1995,121(2):153-160.[5] .[D].:,1990.[6] []R.E.[M].:,2001.[7] ,,,.UASB[J].,2003,21(2);7-10.CauseandControllingMeasureoftheDensity-RisingofVFAinUASBReactoratLowTemperatureLILu,FUJinxiang,SONGQi,SUNWenzhang(SchoolofMunicipalandEnvironmentalEngineering,ShenyangJianzhuUniversity,Shenyang110168,China)Abstract:Thispaperanalyzesthecauseofthedensity-risingofVFAinUp-flowAnaerobicSludgeBedreactoratroomtemperaturecondition(7~25℃)andworkesouttheeffectivemeasuretodecreasethedensi-tyofVFA.Dynamicsmall-scaleexperimentwasappliedtoprocesshighconcentrationorganicwastewater(themassconcentrationofCODisabout4000mg/L).Theresultsofthistestshowthat,underlowtempera-turecondition,solongastheexperimentcontrolstheappropriateinfluentalkalinity,micrometalelement,rateofbackflowandorganicloadingrate,theeffluentwatermassconcentrationofVFAcouldbelowerthan400mg/L,withoutanyVFAaccumulation.Keywords:UASB;lowtemperature;VFA;alkalinity840 ()23
本文标题:低温UASB反应器内挥发酸升高的原因与控制措施李璐
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