Abstract：In order to realize automatic control of sequencing batch reactor(SBR), the feasibility of employing dissolved oxygen(DO), pH value and oxidation reduction potential(ORP) as the controlling parameters for the termination of different reaction stages, which included phosphorus release under anaerobic condition, nitrification under aerobic condition, aeration and phosphorus uptake under aerobic condition and denitrification under anoxic conditions, were investigated by treating synthetic wastewater in an anaerobic/aerobic/anoxic (AOA) SBR. The results showed that the turning point of pH value and ORP profiles was corresponding to the termination of phosphorus release in anaerobic stage. The lowest point of pH profile was corresponding to the termination of nitrification in aerobic and DO, pH value and ORP increased to stable levels after nitrification. The combination of DO, pH value and ORP could be used to estimate the termination of aeration time and phosphorus uptake in aerobic stage. The lowest point of ORP profile was corresponding to the termination of denitrification in anoxic. The characteristic points of DO, pH value and ORP could be used as the process control parameters for the nitrogen and phosphorus removal in SBR.
Jia Yanping,Jia Xinqian,Zhang Lanhe et al. Control Parameters for Removal of Nitrogen and Phosphorus in Sequencing Batch Reactor[J]. 化学反应工程与工艺, 2015, 31(2): 136-141.
