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Supervisory Control System for Adaptive Phase and Work Cycle Management of Sequencing Wastewater Treatment Plant

P. HIRSCH, R. PIOTROWSKI, K. DUZINKIEWICZ, M. GROCHOWSKI
Gdansk University of Technology, Faculty of Electrical and Control Engineering,
Narutowicza 11/12, 80-233 Gdansk, Poland
piotr.hirsch@pg.edu.pl, robert.piotrowski@pg.edu.pl,
kazimierz.duzinkiewicz@pg.edu.pl, michal.grochowski@pg.edu.pl

Abstract: The paper presents the design of the integrated control system applied to Sequencing Batch Reactor (SBR) in a biological Wastewater Treatment Plant (WWTP) in Swarzewo, which operates under activated sludge technology. Based on the real data records, ASM2d biological processes model and aeration system model, hierarchical control system for dissolved oxygen tracking and cycle management is designed. Internal Model Controller (IMC) was applied to control the air flow at the lower control level. Higher level dissolved oxygen controller is based on Direct Model Reference Adaptive Control (DMRAC) method. The supervisory system performs management of reactor work cycle, determines the phase length, controls sludge age, calculates setpoint of dissolved oxygen and adapts parameters of the lower control layer. Proposed control system allowed to: increase the efficiency, improve the quality of outflow and reduce the cost of aeration and chemical treatment plant, in relation to existing solutions in case study plant.

Keywords: activated sludge, aeration, control, wastewater treatment, dynamic simulation, sequencing batch reactor.

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CITE THIS PAPER AS:
P. HIRSCH, R. PIOTROWSKI, K. DUZINKIEWICZ, M. GROCHOWSKI, Supervisory Control System for Adaptive Phase and Work Cycle Management of Sequencing Wastewater Treatment Plant, Studies in Informatics and Control, ISSN 1220-1766, vol. 25(2), pp. 153-162, 2016.

https://doi.org/10.24846/v25i2y201602