进水模式对强化脱氮好氧颗粒污泥培养的影响

中国环境科学2018,38(3)：935~942ChinaEnvironmentalScience进水模式对强化脱氮好氧颗粒污泥培养的影响金正宇1,郗皓1,2,苑泉1,王凯军1*(1.清华大学环境学院,环境模拟与污染控制国家重点联合实验室,北京100084；2.华电水务工程有限公司,北京100160)摘要：针对不同进水模式对好氧颗粒污泥培养及强化脱氮效果的影响尚无统一定论的问题,系统比较研究了快速进水直接曝气、快速进水厌氧搅拌和厌氧推流慢速进水3种模式对好氧颗粒污泥形成特性及脱氮效果的影响.研究发现,快速进水直接曝气模式所形成颗粒污泥表面易生长丝状菌,颗粒粒径可达2.0mm以上,但易解体;快速进水厌氧搅拌模式可形成粒径多为1.5~2.0mm的好氧颗粒污泥,TN去除率达到80%,优于前种模式,但未能避免颗粒解体;厌氧推流慢速进水可获得粒径多为1.0~1.5mm的颗粒污泥,常规负荷下出水COD浓度约10~15mg/L,TN浓度小于1mg/L,TN去除率达90%,满足地表III类水标准.系统比较证实,厌氧推流慢速进水方式是实现强化脱氮好氧颗粒污泥培养的最佳模式.关键词：好氧颗粒污泥；强化脱氮；进水模式；高品质水中图分类号：X703.5文献标识码：A文章编号：1000-6923(2018)03-0935-08Impactsoffeedingmodeonstableaerobicgranularsludgecultivationforenhanceddenitrification.JINZheng-yu1,XIHao1,2,YUANQuan1,WANGKai-jun1*(1.StateKeyJointLaboratoryofEnvironmentalSimulationandPollutionControl,SchoolofEnvironment,TsinghuaUniversity,Beijing100084,China；2.HuadianWaterEngineeringCo.,LTD,Beijing100160,China).ChinaEnvironmentalScience,2018,38(3)：935~942Abstract：Theroleoffeedingmodeincultivatingstableaerobicgranularsludgeforenhanceddenitrificationwasstudied.Threetypicalmodes,includingdirectaerationafterfastfeeding,anaerobicstirringafterfastfeedingandanaerobicplug-flowslowfeeding,werecomparedinthisstudyintermsofgranularstabilityanddenitrificationperformance.Largegranuleswithadiameterover2.0mmformedinthefirstmode,butunderwentseverefilamentationanddegranulationafterwards.Granuleswithanaveragediameterof1.5~2.0mminthesecondmodeachievedaTNremovalof80%,butfailedtopreventdegranulation.Anaerobicplug-flowslowfeedingmodeformedstablegranuleswithanaveragediameterof1.0~1.5mmandmanagedeffluentqualitywithaCODconcentrationof10~15mg/LandaTNconcentrationlessthan1mg/L(90%removal),whichmatchedtherequirementofsurfacewaterqualitystandardsclassIIIinChina.Assuch,anaerobicplug-flowslowfeedingwasdemonstratedthemostpromisingfeedingmodeforstableaerobicgranularsludgecultivationaimingatenhanceddenitrification.Keywords：aerobicgranularsludge；enhanceddenitrification；feedingmode；high-qualityeffluent传统活性污泥污水处理系统因其庞大的占地及出水水质的瓶颈,在我国土地资源日益稀缺和水处理品质需求不断提