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:2004-05-23:(SK200417)李文婷,余占奎,张春霞,施凤英(1., 201418) : 根据酸洗废水的水质特点,确定了二级曝气中和法作为酸洗废水的处理工艺,并在工艺理论上进行了分析探讨;模拟试验结果表明二级曝气中和法对酸洗废水中污染物去除效果显著,出水符合国家排放标准.: 酸洗废水;二级曝气中和法;工艺: X703 : A :1004-0366(2006)01-0107-04StudyontheProcessofNeutralizationforAcidCleaningWastewaterTreatmentLIWen-ting,YUZhan-kui,ZHANGChun-xia,SHIFeng-ying(1.CollegeofCivilEngineerign,ShanghaiNormalUniversity,Shanghai201418,China)Abstract: Accordingtowaterqualityofacidcleaningwastewater(ACW),thetreatmentprocessoftwo-stageaerationneutralizationforACWisdefinedandfurtherdiscussedbasedontheoreticalanalyses.TheresultofsimulationexperimentshowsthatthisneutralizationprocesshasdistincteffectsontheremovalofcontaminantsinACW.Itmeetstherequirementsofdischargingstandardofourcountry.Keywords: acidcleaningwastewater;processoftwo-stageaerationneutralization;treatment ,、、、,,,.,,,[1,3].20t,,、、、,,.,,.,,.1 、、、,.CODcr,SS,pH,,:,,,,.1.1 、,,:AA~670.:65,10~6;10~12.:;190~900nm;:220V±10%,50Hz/60Hz;:0.02~3.00nm.,PXJ-IB,PF-IC(201).1.2 ,:(1)pH4,.18 120063 JournalofGansuSciences Vol.18 No.1Mar.2006DOI:10.16468/j.cnki.issn1004-0366.2006.01.0271 CODcr/mg·L-1SS/mg·L-1pH//mg·L-1/mg·L-1/mg·L-1/mg·L-1822112.315620.335.637.8206.4 (2),COD,COD.(3).,8mg/L[1],,F[2].(4),,.(5),,Cr3+[2],,[4].(6),Ni2+,Ni(OH)2.(7)(),,,,.2 2.1 ,、、、,.、、,,[3],,pH6.5.,,,,2,1.(1)一级曝气中和 :,[3].,;,,,Fe2+,,,,.,0.5~3.0mm,,,[4];pH4~5[4],,2;,,,.(2)2级曝气中和混凝 2,.,,,,.,,,.(3)砂滤 ,108 2006 1,.(4)污泥处置 ,、、,,.,,,,,,2,.2.3 (1)pH pH8.5~9.5,pH[5](2),,pH8,pH,8.5pH.图2 pH值对三价铬溶解度的影响 (2)加药量 ,.3,100mg/L,1∶20,.图3 石灰石沉淀除镍的处理效率(3)沉渣回流比 ,(3)..,(rr),,,.、、、,,Ni(OH)2,10-14.7,10-17.2,,,pH,,2 CODcr/mg·L-1SS/mg·L-1pH//mg·L-1/mg·L-1/mg·L-1/mg·L-12178.440.110.722.490.3160206.0~9.0501.501.0010.00-3 pH/mg·L-1/mg·L-1/mg·L-1/mg·L-19.00.110.722.490.318.41.251.148.802.55.3~4,[7].(4)曝气强度 ,,10918 : ,、,0.15m3/min,8J/cm2[6],0.5~3.0mm,,.3 3.1 (1) 200mL,,,,.(2)2级曝气中和混凝反应 8%,,,pH8~9,5min.(3)沉淀 2,.2h20%,,,,.3.2 12,,.,;,(pH、、、),、.,、,.,15min78%,2h20%,.,2d,,.4 (1),2,.(2)、,pH、、、.(3),.:[1] ZabbanW,JewettHW.TheTreatmentofFlourideWastes[J].Proceedingofthe22ndIndustrialWasteConference.PurdueUni-versity,1967.706-716.[2],,.[M].:,2000.[3] ,.[J].,2002,3(3):88-91.[4] .[M].:,1975.11.[5]ParsonsWA.ChemicalTreatmentofSewageandIndustrialWastes[M].WashingtonDCNationalLimeAssociation,1965.[6] .[M].:,1987.10.[7] ,,.[M].:,1999.:,(1968-),,,,:.110 2006 1
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