污泥厌氧水解与短程硝化反硝化耦合工艺处理低碳氮比城市污水_薛通

第24卷第1期高校化学工程学报No.1Vol.242010年2月JournalofChemicalEngineeringofChineseUniversitiesFeb.2010文章编号：1003-9015(2010)01-0150-06污泥厌氧水解与短程硝化反硝化耦合工艺处理低碳氮比城市污水薛通,薛源,杨凤林,付志敏,柳丽芬,王婵婵(大连理工大学环境与生命学院,辽宁大连116023)摘要：为处理低碳氮比城市污水，在30~35℃、不调节pH值(7.01~8.33)的条件下，通过人为添加氨氮控制游离氨浓度(25mg⋅L−1)，在SBR中6d内成功启动了短程硝化反硝化。对比实验结果表明，短程硝化反硝化在处理低C/N比城市污水时的总氮脱除效果要优于传统的全程硝化反硝化，当反应器运行稳定后，溶解氧的浓度和高游离氨不再是影响NO2--N浓度累积的主要因素，NO2−-N/NOx−-N始终保持在80%以上。为了进一步提高短程硝化反硝化的脱氮效率，利用污泥厌氧水解产物替代10%进水，为反硝化阶段提供附加的部分碳源，两工艺联合后处理效果良好，出水TN平均浓度和去除率分别为13.39mg⋅L−1和74.9%，出水水质符合排放标准的要求。关键词：短程硝化反硝化；污泥厌氧水解；实际城市污水；低C/N比中图分类号：X52文献标识码：ANitrogenRemovalEfficiencyofaShortcutNitrification-DenitrificationProcessIntegratedwithSludgeAnaerobicHydrolysisforTreatingLowC/NRatioMunicipalWastewaterXUETong,XUEYuan,YANGFeng-lin,FUZhi-min,LIULi-fen,WANGChan-chan(SchoolofEnvironmental&Biological,DalianUniversityofTechnology,Dalian116023,China)Abstract:InordertoachievenitrogenremovalintreatingmunicipalwastewaterwithlowC/Nratio,ashortcutnitrification-denitrificationprocesswassuccessfullydevelopedinasequencingbatchreactor(SBR)in6dayswiththeoperationconditionsofworkingat30~35℃,withoutpHcontrol(7.01~8.33)andmaintainingahighconcentrationoffreeammonia(FA,25mg⋅L−1)byaddingNH4+-N.Theexperimentresultsshowthatthetotalnitrogenremovalefficiencyofshortcutnitrification-denitrificationissuperiortothatofthetraditionalnitrification-denitrificationintreatingmunicipalwastewaterwithlowC/Nratio.Itwasalsofoundthatdissolvedoxygen(DO)andFAdonotaffectaccumulationofNO2−-Nwhentheoperationisstabilized,andtheNO2−-N/NOx−-Nratiocouldbemaintainedover80%.Inordertoenhancethenitrogenremovalefficiencyoftheshortcutnitrification-denitrification,10%ofSBRinfluentisreplacedwiththeproductsofsludgeanaerobichydrolysisforsupplyingextrapartofthecarbonsourcesfordenitrification.Thetotalnitrogenremovalefficiencyofthecombinedprocessis74.9%.Thetotalnitrogenconcentrationintheeffluentis13.39mg⋅L−1,whichmeetsthequalityrequirementofthedischargestandards.Keywords:shortcutnitrification-denitrification;sludgehydrolysis;