SBR-using-real-time-control-strategy-when-treating-domestic-wastewater

SBR-using-real-time-control-strategy-when-treating-domestic-wastewaterBiochemicalEngineeringJournal36(2007)87–92Nitrification–denitrificationvianitriteinSBRusingreal-timecontrolstrategywhentreatingdomesticwastewaterChangyongWua,ZhiqiangChena,XiuhongLiua,YongzhenPenga,b,∗aSchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,PRChinabKeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,CollegeofEnvironmentalandEnergyEngineering,BeijingUniversityofTechnology,Beijing100022,PRChinaReceived31July2006;receivedinrevisedform2February2007;accepted4February2007AbstractAlab-scalesequencingbatchreactor(SBR)wasemployedtotreatlowC/Nratiomunicipalwastewatertoinvestigatethestabilityofnitrification–denitrificationvianitriteusingareal-timecontrolstrategytoswitchaerationonandoff.Threeparameters,pH,DOandORP,wereselectedascontrolparametersintheSBRreactoroperation.Nitriteaccumulationwasobservedunderreal-timecontrolconditions(NO2−-N/NOx−-N>0.8),imp