Vangsgaard, Anna Katrine2; Mauricio Iglesias, Miguel3; Gernaey, Krist2; Smets, Barth F.4; Sin, Gürkan5
1 Computer Aided Process Engineering Center, Department of Chemical and Biochemical Engineering, Technical University of Denmark2 Department of Chemical and Biochemical Engineering, Technical University of Denmark3 Center for Process Engineering and Technology, Department of Chemical and Biochemical Engineering, Technical University of Denmark4 Department of Environmental Engineering, Technical University of Denmark5 Centre for oil and gas – DTU, Center, Technical University of Denmark
The nitrogen removing granular sludge process is a novel and intensified process. However, its stable operation and control remains a challenging problem. In this contribution, a new process oriented approach is used to develop, evaluate and benchmark control strategies to ensure stable operation and rejection of disturbances. Three control strategies were developed: a feedforward control (case 1), a rule-based feedback control (case 2), and a feedforward-feedback controller, in which the feedback loop updates the set point of the feedforward loop (case 3). The case 1 controller, based on influent measurements, was giving the best performance against disturbances in the ammonium concentration, whereas case 2 was providing the best performance against disturbances in the organic carbon concentration. The case 3 controller rejected both disturbances satisfactorily. Thus, this controller provided versatility towards disturbance rejection, however through a less tight control, which meant a bigger offset from the removal efficiency.
23rd European Symposium on Computer Aided Process Engineering – Escape 23, 2013, p. 769-774
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23rd European Symposium on Computer Aided Process Engineering, 2013