UASB生物接触氧化处理小麦淀粉废水的研究胡文云

UASB-胡文云,高媛媛　(,430023)　[目的]研究厌氧-好氧组合工艺处理小麦淀粉废水的工艺参数,为小麦类食品加工行业的废水处理工艺提供参考。[方法]以目前最具代表性的UASB-生物接触氧化组合工艺处理小麦淀粉废水,研究其最佳工艺参数。[结果]单因素最佳条件为:UASB反应器流量50.0L/h,水力停留时间4.0h;生物接触氧化池曝气量1.2m3/h,水力停留时间1.0h。其UASB反应器的CODCr去除率可达75%～80%,生物接触氧化池可达70%～80%。在单因素试验基础上进行了正交试验,结果表明,当UASB反应器的水力停留时间为3.0h时,其出水CODCr值可降至600mg/L,去除率达到70%～80%;然后使出水通过生物接触氧化池处理后,其出水CODCr值可降至200mg/L左右,去除率达到65%～75%。UASB-生物接触氧化组合工艺处理小麦淀粉废水的最佳工艺参数为:UASB反应器水力停留时间2.0h,UASB反应器流量45.0L/h,生物接触氧化池水力停留时间1.0h,生物接触氧化池曝气量1.2m3/h。该组合工艺的CODCr去除率为92.5%。[结论]食品加工行业的废水处理工艺采用以上工艺参数可以达到行业排放标准。　UASB反应器;生物接触氧化池;小麦淀粉废水;CODCr　X703　　　A　　　0517-6611(2010)11-05821-04ResearchontheOxidationTreatmentoftheWheatStarchWastewaterbyUASB-biologicalContactorHUWen-yunetal　(InstituteofChemicalandEnvironmentalEngineering,WuhanUniversity,Wuhan,Hubei430023)Abstract　[Objective]Thereferenceforthewastewater-treatingintheindustryofwheatfoodprocessingwasprovidedthroughthestudyonthetechnicalparameterinthetreatmentprocessofwheatstarchwastewaterwiththecombinedtechnologyofanaerobic-aerobicprocess.[Method]TheoxidationprocessofUASB-biologicalcontactor,amostrepresentativecombinedtechnique,wasappliedforthetreatmentofthewastewaterfromwheatstarch-processingtostudytheoptimumprocessingparameter.[Results]Theoptimumconditionfromsingle-factorexperimentwastheflowrateofUASBreactorwas50.0L/hwiththetimeofhydraulicretentionof4.0hours;theamountoftheaerationinbio-contactoxidationpondwas1.2m3/hwiththetimeofhydraulicretentionof1.0hourandtheremovalrateofCODCrintheUASBreactorwasupto75%-80%andinthebio-contactoxidationpond,70%-80%.Theresultsfromtheorthogonalexperimentbasedonsingle-factortestshowedthattheremovaleffi-ciencywas70%-80%whenthetimeofhydraulicretentionintheUASBreactorwas3.0hoursanditsvalueofthewater-exitingforCODCrmightbereducedto600mg/L;thenthevalueofthewater-exitingforCODCrmightbereducedto200mg/Lorsoaftertheeffluentwatertreatedbybio-logicalcontactoxidationpond,andtheremovalratewas65%-75%.TheoptimumparametersinthetreatmentofwheatstarchwastewaterwiththeUASB-biologicalcontactoxidationprocesswas:thetimeofhydraulicretentioninUASBreactor,2.0hours;theflowrateinUASBreactor,45.0L/h;thetimeofhydraulicretentioninbio-contactoxidationpond,1.0hourandtheaerationofbio-contactoxidationpond,1.2m3/h.TheremovalrateofCODinthecombinedprocessingtechniquewas92.5%.[Conclusion]Theprocessingparametersmentioned-abovecouldbeusedforthewastewater-treatinginthefoodprocessingindustry,whichcouldpromotethestandardofthedrainagewastewaterbeingreachedtothatoftheindustry.Keywords　UASBreactor;Bio-contactoxidationpond;Wheatstarchwastewater;CODCr　胡文云(1970-),女,重庆人,硕士,副教授,从事水污染治理方面的研究。　2010-01-08　　,。,、、,[1]。,,,。,,,,,(COD)。,,,,[2-8]。UASB-。UASB、、、。,,;,,;,;;,。,。1　1.1　1.1.1　。,。,,CODCr,。,,。40L,,CODCr2000mg/L,BOD5/CODCr0.4。、、pH,。1.1.2　。,(GB1355-86);(A.R);(A.R);(A.R);(、);NaOH(A.R)。1.1.3　。:MS-3(,);306mm×510mm×360mm;():868();:PYX-250-B();BOD:Oxitopcontrol12(WTW);UASB:WT-026();:WT-019()。,JournalofAnhuiAgri.Sci.2010,38(11):5821-5824　李菲菲　　况玲玲DOI:10.13989/j.cnki.0517-6611.2010.11.0221.1.4　。、。1.2　　CODCr[9],pH(),5d,[10]。2　2.1　2.1.1　UASBpH。UASB50.0L/h(CODCr2331.1mg/L),pH1。1,pH7.48,。,pH。1.0h,pH6.81,,2.0h,。1　UASBpHFig.1　ThevariationofpHvalueinUASBreactorwithHRT　　pH,UASB,,,pH[11]。UASB———pH6.80～7.40,pH,UASB。1,1.0hpH。,,pH,,pH6.80～7.40,,。2.1.2　pH。1.2m3/h(CODCr346.1mg/L),pH2。2,,pH。0.5h,pH6.81,,。　　pH,,,、,[12]。,;,,、、,。pH0.5h,,。pH,pH6.50～8.50(pH)。,,pH。2　pHFig.2　ThevariationofpHvalueinbio-contactoxidationreac-torwithHRT2.1.3　UASB。UASB50.0L/h(CODCr2331.1mg/L)、40.0L/h(CODCr2150.6mg/L)30.0L/h(CODCr2257.0mg/L),COD3。3,UASB50.0、40.030.0L/h,COD。,,UASB50.0L/h,COD;UASB40.0L/h,COD;UASB30.0L/h,COD。,UASB,。,,。3　CODFig.3　ThevariationofCODremovalratewithHRTunderdif-ferentflow3,UASB50.0L/h,1.0h,COD44.8%,;,4.0h,COD81.5%,;5.0h,COD85.2%,。4.0h,UASB5822　　　　　　　　　　安徽农业科学　　　　　　　　　　　　　　　　　　　　　　　　　201050.0L/h。,。UASB,,。,,COD,,,,。,,[13]。,COD,,,,。,,,COD。,UASB50.0L/h,4.0h。,3,UASB40.0L/h,5.0h;UASB30.0L/h,7.0h。,UASB。,,,。,UASB,,,。,60.0L/h,。,UASB50.0L/h,4.0h。2.1.4　。1.2m3/h(CODCr346.1mg/L)、1.0m3/h(CODCr455.7mg/L)、0.8m3/h(CODCr423.2mg/L),COD4。4,1.2、1.0、0.8m3/hCOD,。,,1.2m3/h,COD;1.0m3/h,COD;0.8m3/h,COD。,,,,[14]。4　CODFig.4　ThevariationofCODremovalratewithHRTunderdif-ferentaerationquantity　　4,1.2m3/h,0.5h,COD60.0%,;1.0h,COD74.0%,;1.5h,COD77.6%,。1.0h,,1.0h,1.2m3/h。,1.0m3/h,,1.5h;0.8m3/h,2.0h。,。,。,,,,,。,。,1.2m3/h,1.0h。UASB60.0L/h,UASB60.0L/hCOD50.0L/h;,1.6m3/h,1.4m3/h,1.2m3/hCOD。,,UASB50.0L/h,4.0h;1.2m3/h,1.0h。2.2　　1。1,:UASBUASB。:UASB2.0h;UASB45.0L/h;1.0h;1.2m3/h。3　(1)UASB-CODCr2000mg/L。,4,:UASB50.0L/h,4.0h;1.2m3/h,1.0h。UASBCODCr80%～85%,CODCr75%～85%。(2)UASB2.0h,UASB45.0L/h,1.0h,1.2m3/h。COD92.5%。(3)pH,,pH。,pH,。582338卷11期　　　　　　　　　　　　　　　　胡文云等　UASB-生物接触氧化处理小麦淀粉废水的研究1　Table1　AnalysisoforthogonaltestresultSerialNo.UASB∥L/hUASBreactorflowUASB∥hUASBreactorHRT∥m3/hBio-contactoxidationpondaeration∥hBio-contactoxidationpondHRTCOD∥%CODremovalrate145.02.01.31.591.3250.02.01.11.093.0355.02.01.22.091.2445.03.01.21.092.1550.03.01.32.090.0655.03.01.11.585.2745.04.01.12.089.0850.04.01.21.588.3955.04.01.31.086.1K190.891.889.188.3K290.489.189.190.4K3