高浓度废水可调式厌氧处理技术张艳

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张 艳1 崔兆杰1 姜 斌2 刘 雷1(1.,250100;2.,250002):以酒精发酵和有机化工混合废水为研究对象,通过对原厌氧工艺的改进,成功地研发了“可调式Ⅰ级全糟发酵/DDG+Ⅱ级UASB+Ⅲ级IC”厌氧工艺,实现了废水有机负荷和进入方式的随机调节。运行结果表明:新工艺运行稳定,有机负荷提高1倍,沼气产率提高39%~56%,厌氧阶段出水COD由原工艺的2000mg/L降低到500mg/L左右,COD去除率由93%上升到99%。:高浓度废水;厌氧;可调式ADJUSTABLEANAEROBICPROCESSFORHIGHORGANICCONTENTWASTEWATERZhangYan1 CuiZhaojie1 JiangBin2 LiuLei1(1.SchoolofEnvironmentalScienceandEngineering,ShandongUniversity,Jinan250100,China;2.ShandongMedicalCollege,Jinan250002,China)Abstract:Takingthemixedwastewaterfromalcoholfermentationandorganicchemicalindustryastheobject,andthroughim-provementontheoriginalanaerobicprocess,itwassuccessfullydesignedthenewanaerobicprocessof“adjustablewholestil-lageanaerobicfermentation/DDG+UASB+IC”,whichcouldmodulatetheorganicloadandentrymodeofthewastewatersto-chasticly.Theresultsindicatedthatthenewprocessranstably,whichdoubledtheorganicload,increased39%~56%ofgasproduction,decreasedtheCODofthefinaleffluentfrom2000mg/Ltoabout500mg/L,andincreasedtheCODremovalratefrom93%to99%.Keywords:highorganiccontentwastewater;anaerobic;adjustable0 ,、,,,,。,-,UASB、EGSB、IC、UASB[1-4],COD2000mg/L。,COD、、。,,,。,,。,,,,。1 ,,、、。9600m3,、。。5400m3,1400m3,4000m3,ρ(COD)5.3~5.8mg/L,ρ(SS)3.5~4mg/L,pH3.5~4.5,93%~94%,。1100m3,ρ(COD)1000~1500mg/L,pH4.5~5.5,。 3   20102281DOI:10.13205/j.hjgc.2010.01.003,3000m3,ρ(COD)6000mg/L,pH3.0~4.0,。,1500m3,ρ(COD)1000~1300mg/L,pH4.0~5.0,。2 2.1 废水处理工艺--,Ⅰ()+ⅡUASB(),3000m312,1800m3UASB8,、、。1。ⅠⅡ1 2.2 运行效果分析1。1 ρ(COD)/(mg·L-1)ρ(BOD)/(mg·L-1)ρ(SS)/(mg·L-1)pH5.3~5.83~3.53.5~43.5~4.53~3.51.8~2.32.5~34~6Ⅰ5000~80002500~35001500~25007~9Ⅱ2500~35001000~1500800~9007~9~2000700~1000400~5006~9  1,COD,2000mg/L,,。ρ(BOD)/ρ(COD)≈0.5,,,。,,,,。,。3 3.1 新技术改进的原则,,,,。,“、”,,,,,,、、、,。,,DDG,。,DDG,。,,,DDG。,。,,,,,,,。3.2 可调式厌氧处理技术,,2。2 3.2.1 Ⅰ()ⅠⅠ,,(55±1)℃,123000m3(15m×18m)。Ⅰ,。,U。,。9m16m,2,4   20102281。Ⅰ———DDG。DDGCOD,,DDG。Ⅰρ(COD)3~3.5mg/L,ρ(COD)5.3~5.8mg/L,Ⅰ。,10~12kg/(m3·d),,7.5d。DDG,8~10kg/(m3·d),5d。、。ⅠⅠ,ρ(COD)3~3.5mg/L,COD,。:,30d,ρ(COD)35000mg/L;,30d,ρ(COD)45000mg/L;,30d,ρ(COD)55000mg/L。COD4~5kg/(m3·d)。,COD、VFA、pH,,,。3,。COD3,pH4。3 ⅠCOD4 ⅠpH34:,ρ(COD)15000mg/L,1,11000mg/L,COD60%80%。pH,7.8~8.5。3。Ⅰ,;,,。3.2.2 Ⅱ(UASB),。ⅡⅡUASB,(34±1)℃,121500m3(14m×12m)。6m10m,。ⅡCOD,,,Ⅲ。ⅠSS,30000mg/L,,。ρ(SS)2000mg/L,ρ(COD)8000mg/L,COD。,Ⅱ。1:pH3.0~4.0,,,,。ⅠpH7.8~8.5,,,。ⅡⅡUASB,,。6~8kg/(m3·d),3d,。3,COD5,pH6。56:ⅡUASB,ρ(COD)3000mg/L,COD65%,pH7.5~8.2。ⅡUASB,,。5   201022815 ⅡUASBCOD6 ⅡUASBpH3.2.3 Ⅲ(IC)ⅡCOD,,,。,Ⅲ,102000m3IC(12m×20m)(34±1)℃。ⅢICρ(COD)5000mg/L,,24h。44m,2,10,18m3,3,,。ICⅡ,MLSS20g/L。IC,ρ(COD)4000~6000kg/L,。VFA,VAF400mg/L,20%。3:COD0.75kg/(m3·d);COD2~5kg/(m3·d);COD5kg/(m3·d)。3,IC,COD7,pH8。78:IC,COD,1000mg/L,20d,1,500~600mg/L。3ICρ(COD)500mg/L,COD90%,pH7~8。,,,COD。,,,。IC,ρ(COD)3000mg/L,5000mg/L,,ρ(COD)500mg/L。7 ⅢICCOD 8 ⅢICpH IC,COD,,IC,,。3.3 可调式高浓度废水厌氧处理技术运行效果Ⅰ、Ⅱ、Ⅲ3,。Ⅰ/DDG;、;Ⅰ、Ⅲ。,1,2。2 ρ(COD)/(mg·L-1)ρ(BOD5)/(mg·L-1)ρ(SS)/(mg·L-1)pH52874~5825029445~3500735049~417223.5~4.5Ⅰ10308~115965709~700219653~253837.8~8.57820~85441836~24501458~18727.8~8.5Ⅱ2902~3639832~1289720~8557.5~8.2Ⅲ463~558279~384162~2137.0~8.26   20102281  2,,COD99%,COD500mg/L,ρ(BOD)/ρ(COD)≈0.6,,,。4 1),,ρ(COD)2000mg/L500mg/L,COD99%,,。,,1.3×107kW·h,Ⅲ2.11×106kW·h,1.1×107kW·h,0.57/(kW·h),606。2)/DDG。COD5~6kg/(m3·d)10~12kg/(m3·d)。16~18m3/m325m3/m3,39%~56%。9、3DDG,2250m3,1.65kW·h,3.7×107kW·h;DDG4t,900/t,3600。DDG1120,2480。3)、,。Ⅰ5600m3/d,Ⅱ、Ⅲ2600m3/d,,230。ⅢIC1570,120。、230、606,2.2。[1] ,,,.UASB[J].,2005,2(11):95-98.[2] ,,.EGSB[J].,2007,33(7):88-90.[3] ,,,.(IC)[J].,2007,1(5):41-44.[4] ,,,.UASB-CAAS[J].,2006,3(10):101-107.  250100 27 303E-mail cuizj@sdu.edu.cn2009-01-08(2)950,3.0/m3,3.6/m3,0.3/m3,6.9/m3。,COD211t/a。3 mg/Lρ(COD)ρ()ρ()/118214.811.720001170.5010.419601501.02.080  :。4 --,GB8978-1996。:M、DMTMTD,。[1] ,.M[J].,2008,28(2):21-23.[2] ,,,.Fenton[J].(),2005,21(4):71-74.[3] ,,.[J].,1995,3(1):55-64.[4] ,,,.[J].,2005,25(12):13-17.[5] ,.[J].,2007,19(3):26-29.[6] ,,,.-[J].,2008,26(3):18-19.  450002 97 E-mail yuluji@126.com2009-08-137   20102281

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