StudyonmethanogenictoxicitytoanaerobicmicroorganismsofCr3+inindustrialwastewaterLuoYahong1,FanJing1,HeChengda2,LiYifan1(1.HenanKeyLaboratoryforEnvironmentalPollutionControl,CollegeofChemistryandEnvironmentalScience,HenanNormalUniversity,Xinxiang453007,China;2.SchoolofEnvironmentScienceandEngineering,YangzhouUniversity,Yangzhou225009,China)Cr3+1,1,2,1(1.,,453007;2.,225009)[](35±1)℃,,Cr3+。,Cr3+,Cr3+50mg/L,;Cr3+100~150mg/L,;Cr3+200mg/L,。:Cr3+≤50mg/L,Cr3+100mg/L,Cr3+≥150mg/L。[];;[]X703.1[]B[]1005-829X(2010)08-0033-03Abstract:Theanaerobicmethanogenictoxicityhasbeenstudiedintermittentlyunderanaerobicconditionatthetemperatureof(35±1)℃.TheeffectsofinhibitionextentandtoxicitymechanismofCr3+withdifferentconcentrationsonanaerobicmicroorganismsarediscussed.TheresultsshowthatCr3+hassignificantinhibitingeffectontheactivityofmethanogenicbacteriainanaerobicsludge.Itisslightinhibition,whenCr3+massconcentrationis50mg/L;moder-ateinhibition,whenitsmassconcentrationis100-150mg/L;andsevereinhibition,whenitsmassconcentrationisover200mg/L.Themechanismoftoxiceffectsismetabolictoxins,whenCr3+massconcentrationislessthan50mg/L;physiologicaltoxin,whenCr3+massconcentrationis100mg/L;andbactericidaltoxin,whenCr3+massconcen-trationismorethan150mg/L.Keywords:industrialwastewater;anaerobictoxicity;methanogenicactivity、。Cr6+,,Cr3+Cr6+,。Cr3+〔1〕。Cr3+50%(50%IC)Cr3+〔1〕,Cr3+。AFB,,Cr3+。11.1NH4Cl、KH2PO4、CaCl2·2H2O、MgSO4·4H2O,170、37、8、9g/L。ZnCl2、H3BO3、(NH4)6Mo7O24·4H2O、EDTA、FeSO4·4H2O、NiCl2·6H2O、CuCl2·2H2O、MnCl2·2H2O、CoCl2·6H2O,0.05、0.05、0.09、1、2、0.05、0.03、0.5、2g/L。[](200804760004)30820108IndustrialWaterTreatmentVol.30No.8Aug.,201033——2010-08,30(8)NaHCO3,〔1〕。1.2AFB。VSS16g/L。1.31。250mL,,(35±1)℃,。,3%NaOH,CO2,20mL,。1.4,1,。1.4.11#—7#7250mL,31mLVSS16g/L、1g、0.5gNaHCO3。1#,2#—7#Cr(NO3)3Cr3+50、100、150、200、300、400mg/L。COD2.4g/L,pH7.0~7.5,VSS1.9g/L。,(35±1)℃。,,,,()。1.4.2,,,,,,,。1.4.3,。(Ar),(1)。Ar=AsAk×100%(1):As———;Ak———。,(),(2)〔1〕。A=24RCF×V×VSS(2):R———(),mL/h;CF———COD,mL/g;V———,L;VSS———,g/L。Ar75%~95%;Ar40%~75%;Ar40%〔2〕。,,1.4.2,,,、。,,;,,;〔1〕。22.12。2,1#4896144192240288336384432480/mL/h234——2010-08,30(8),,,Ar<1,≥50mg/LCr3+。Cr3+,,Cr3+。96h,。Cr3+50mg/LAr77%,;Cr3+100、150mg/LAr57%48%,;Cr3+200、300、400mg/LAr40%,。2.23。Cr3+,3Cr3+。3,,Cr3+。,Cr3+50mg/L;Cr3+100mg/L,;Cr3+≥150mg/L,,,。23,Cr3+50mg/L,Cr3+,,;Cr3+100mg/L,Cr3+,,;Cr3+≥150mg/L,Cr3+,。2.3Cr3+4。4,Cr3+,Ar,Cr3+,Cr3+。Cr3+,ArAr。Cr3+,(),,,ArAr。3(1)Cr3+,Cr3+50mg/L,;Cr3+100~150mg/L,;Cr3+≥200mg/L,。(2):Cr3+≤50mg/L,;Cr3+100mg/L,;Cr3+≥150mg/L,。(3)Cr3+50mg/L,Cr3+,,Cr3+,,,Cr3+50mg/L。[][1].[M].:,1998:543-558.[2]DriessenWJBM,TielbaardMH,VereijkenTLFM.ExperienceonanaerobictreatmentofdistilleryeffluentwiththeUASBprocess[J].Wat.Sci.Tech.,1994,30(12):193-201.,:Cr3+[](1981—),2007,,。:15903858016,E-mail:yhluo@foxmail.com。[]2010-03-15()35——