naa a22 4500 510820905 CHVBK 20180411083531.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11814-013-0084-x doi (NATIONALLICENCE)springer-10.1007/s11814-013-0084-x Application of real-time feedback control strategies based on effluent NH4-N and NO X -N concentrations in an A2/O process [Elektronische Daten] [Hyosoo Kim, Yejin Kim, Trung Hoang, Gyeongdong Baek, Sungshin Kim, Changwon Kim] This paper proposes two real-time feedback control strategies based on hourly measurements of effluent NH4-N and NO X -N concentrations. Using modified sigmoid functions to decide the DO setpoint, a control structure similar to the cascade-type control loop was selected as the real-time feedback NH4-N control strategy. For the realtime feedback NO X -N control strategy, a proper external carbon dose flow rate could be calculated based on the estimated NO X -N concentration in anoxic reactor by using the empirical equation. A control system, which included two proposed control strategies, was developed and applied in the pilot-scale A2/O process. As a result, the effluent NH4-N and NO X -N concentrations were maintained stably lower than the target values of 3 and 5 mg/L, respectively. Moreover, because the manipulated variables for removing the NH4-N and NO X -N concentrations were divided in the control strategies, the two different control strategies could be successfully applied together in the A2/O process. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Real-time Feedback NH4-N Control Strategy nationallicence Real-time Feedback NO X -N Control Strategy nationallicence Modified Sigmoid Function nationallicence Empirical Equation nationallicence A2/O Process nationallicence Kim Hyosoo Department of Civil and Environmental Eng., Pusan National University, 609-735, Busan, Korea aut Kim Yejin Department of Civil and Environmental Eng., Pusan National University, 609-735, Busan, Korea aut Hoang Trung Department of Civil and Environmental Eng., Pusan National University, 609-735, Busan, Korea aut Baek Gyeongdong Daewoo Shipbuilding & Marine Engineering, Co., Ltd., 656-714, Gyeonsangnam-do, Korea aut Kim Sungshin Department of Electrical Engineering, Pusan National University, 609-735, Busan, Korea aut Kim Changwon Department of Civil and Environmental Eng., Pusan National University, 609-735, Busan, Korea aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/8(2013-08-01), 1578-1587 0256-1115 30:8<1578 2013 30 11814 https://doi.org/10.1007/s11814-013-0084-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0084-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim Hyosoo Department of Civil and Environmental Eng., Pusan National University, 609-735, Busan, Korea aut NATIONALLICENCE 700 1- Kim Yejin Department of Civil and Environmental Eng., Pusan National University, 609-735, Busan, Korea aut NATIONALLICENCE 700 1- Hoang Trung Department of Civil and Environmental Eng., Pusan National University, 609-735, Busan, Korea aut NATIONALLICENCE 700 1- Baek Gyeongdong Daewoo Shipbuilding & Marine Engineering, Co., Ltd., 656-714, Gyeonsangnam-do, Korea aut NATIONALLICENCE 700 1- Kim Sungshin Department of Electrical Engineering, Pusan National University, 609-735, Busan, Korea aut NATIONALLICENCE 700 1- Kim Changwon Department of Civil and Environmental Eng., Pusan National University, 609-735, Busan, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/8(2013-08-01), 1578-1587 0256-1115 30:8<1578 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer