Abstract: Fixed time-schedule control strategy for SBR duration is unable to adjust cycle duration according to input wastewater characteristics and loading,which results in an inefficient operation,i.e.inefficient energy consumption or poor control over effluent quality.A real-time control strategy for enhanced performance and energy saving was developed in this research.Three laboratory-scale EBPR SBRs with different ecology community structure were applied to treat real domestic wastewater.Continuous measurements of ORP and pH were related to the dynamic behaviors of anaerobic phosphorus release and aerobic phosphorus uptake in the SBR,allowing the detection of phosphorous removal.The knee point on aerobic pH profile provided information for species structure of ecology.On basis of it,monitor strategy was specified to predict behavior of functional microorganism.