颗粒活性炭对膜生物反应器脱氮性能的影响
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2020-02-24 09:49:23
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中国环境科学2012,32(1):75-80ChinaEnvironmentalScience颗粒活性炭对膜生物反应器脱氮性能的影响洪俊明,尹娟(华侨大学化工学院,福建厦门361021)摘要:为了考察投加颗粒活性炭(GAC)对膜生物反应器(MBR】运行过程和处理效果的影响,研究了lVlBR和GAC—MBR透膜压差、膜通量的变化情况和脱氮性能,并采用ASM1模型对2个反应器进行数学模拟.结果表明,MBR和GAC一/VlBR的运行周期分别为75,150h,说明GAC的加入能够显著减缓MBR膜污染的速度,延长MBR的运行周期.MBR和GAC—IVIBR氨氮浓度分别为0.5,6rag/L;硝氮浓度分别为4.5,2mg/L总氮浓度分别为5,10mg/L,出水COD均低于20mg/L,出水能符合《城镇污水处理厂污染物排放标准(GB18918—2002)))中的一级A标准.采用ASM1进行工艺数学模拟,模拟出水与实际测量值基本吻合,2个反应器中主要微生物为异养菌和氨氧化菌,异养菌在IVlBR和GAC一/VlBR中的质量分数分别为95.5%和97.7%;好氧氨氧化菌分别为4.4%和2_3%,说明投加颗粒活性炭能有效的缓解膜污染,并对污染物具有良好的处理效果.关键词:膜生物反应器(MBR);颗粒活性炭(GAc);脱氮性能中图分类号:X703.5文献标识码:A文章编号:1000—6923(2012)01—0075—06EffectofdosingGAConthedenitrificationperformanceofmembranebioreactor.HONGJun—ming。,YINJuan(CollegeofChemicalEngineering,HuaqiaoUniversity,Xiamen361021China).ChinaEnvironmentalScience,2012,32(1):75~80Abstract:InordertostudytheefectofadditionGAConoperationparametersandtreatmenteflcienciesintheMBR,thedenitrificationperformance,thepermeablemembranepressureandthemembranefluxofmembranebioreactor(MBR)andgranulesactivatedcarbon—membranebioreactor(GAC—MBR)wereinvestigated.ThetwobioreactorsweresimulatedbytheactivatedsludgemodelNo.1(ASM1).TheoperationperiodofMBRandGAC—MBRwere75,150h,respectively.ThefoulingrateofMBRwasslowed,theopearationperiodWasprolongedbyadditionGAC.TheefluentammonianitrogenconcentrationofMBRandGAC—MBRwas0.5,6mg/L,respectively.TheefluentCODconcentrationsofthemwerelessthan20mg/L.TheefiuentnitrateconcentrationofMBRandGAC—MBRWas4.5,2mg/L.TheefluenttotalnitrogenconcentrationsofMBRandGAC—MBRwas5,10mg/L.TheoutflowwaterqualityWasbetterthanthefirstgradeArequiredbythedischargestandardofpollutantsformunicipalwastewatertreatmentplant.UsingtheactivatedsludgemodelNo.1(ASM1)tosimulatetwobioreactors,thesimulatedvalueofwaterqualitywassimilartotheexperimentalvalue;themostofmicroorganismswereammoniaoxidizingbacteriasandheterotrophices.ThemassfactionofheterotrophicesWas95.5%,97.7%intheMBGAC—MBR,respectively.ThemassfactionofammoniaoxidizingbacteriasWas4.4%intheMBRand2-3%intheGAC—M
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