低温SBR工艺活性污泥代谢特性研究

中国环境科学2012,32(1)：69~74ChinaEnvironmentalScience低温SBR工艺活性污泥代谢特性研究尹军*,李瑞,张振庭,王建辉,王小龙(吉林建筑工程学院市政与环境工程学院,吉林长春130118)摘要：在(7±1)℃条件下,从污染物的去除效能、生物活性、污泥特性等方面,研究了低温SBR系统中活性污泥的代谢特性.结果表明:低温SBR系统在好氧阶段前40min能够将96%的COD去除,整个运行周期活性污泥对COD的代谢状况良好;由于低温的影响,活性污泥硝化反应过程受到抑制,反硝化过程无法正常进行;低温不是影响SBR反应器中聚磷菌P代谢过程的关键因素,在低温条件下聚磷菌对P的摄取、释放代谢状况良好;活性污泥2,3,5氯化三苯基四氮唑(TTC)和碘硝基四氮唑(INT)电子传递体系(ETS)活性呈现出周期性变化规律,TTC和INT-ETS活性能够有效表征整个运行过程活性污泥的代谢特性;稳定运行的低温SBR系统活性污泥表现出良好的沉降性,MLSS、MLVSS、以及MLVSS/MLSS都高于常温SBR系统.关键词：污水处理；低温SBR；活性污泥；代谢特性；生物活性；沉降性中图分类号：X703.5文献标识码：A文章编号：1000-6923(2012)01-0069-06Activatedsludgemetabolicfeaturesinlowtemperaturesequencingbathreactor.YINJun*,LIRui,ZHANGZhen-ting,WANGJian-hui,WANGXiao-long(SchoolofMunicipalandEnvironmentalEngineering,JilinArchitecturalandCivilEngineeringInstitute,Changchun130118,China).ChinaEnvironmentalScience,2012,32(1)：69~74Abstract：TheactivatedsludgemetabolicfeaturesofalowtemperatureSBRsystem(7±1)℃werestudiedforpollutantremovalefficiency,bioactivity,andthesludgefeatureaspects.ThelowtemperatureSBRsystemremoved96%ofCODwithin40minutesduringtheaerobicphase.ThewholeoperationcyclewasbeneficialtoCODdegradation.Thenitrationprocesswasrestrainedandthedenitrifyingprocesswasunabletoworknormallyduetotheeffectoflowtemperature.Thelowtemperaturewasnotthekeyfactorthataffectedthephosphorusmetabolicprocessofpoly-PbacteriaintheSBRreactor,asthepoly-Pbacteriacouldabsorbandreleasethephosphorusnormallyinthelowtemperatureenvironment.TheTTC(2,3,5-triphenyl-tetrazoliumchloride)andINT[2-(p-indophenols)-3-(p-nitrophenyl)-5-phenyl-tetrazoliumChloride]ElectronTransportSystem(ETS)activitycaneffectivelycharacterizetheoperationofactivatedsludgemetabolicproperties.Sludgeinthestableoperatedlow-temperatureSBRsystemshowedgoodsettling.MLSS,MLVSSandMLVSS/MLSSinthelowtemperatureSBRsystemwerehigherthanthatinnormaltemperatureSBRsystem.Keywords：sewagetreatment；lowtemperatureSBR；activatedsludge；metabolicfeatures；bioactivity；settleabilitySBR污水处理工艺是一种简便、高效、耐冲击负荷能力强、运行方式灵活、具有同步脱氮除磷能力的活性污泥污水处理方法[1].目前,国内外对于常温SBR工艺运行特