A pilot plant sequencing batch reactor (SBR) was applied in a wastewater treatment plant treating urban wastewater focused on carbon and nitrogen removal. From an initial predefined step-feed cycle definition, the evolution of the on-line monitored pH and calculated oxygen uptake rate (OUR) were analysed in terms of knowledge extraction. First, the aerobic phases of the SBR cycle were operated using an On/Off dissolved oxygen (DO) control strategy that concluded with a sinusoidal pH profile that made detecting the “ammonia valley” difficult. After changing to fuzzy logic control of the dissolved oxygen and by adding an air flow meter to the pilot plant, the pH evolution and on-line calculated OUR showed a clearer trend during the aerobic phases. Finally, a proposed algorithm for adjusting the aerobic phases of the SBR for carbon and ammonia removal is presented and discussed.
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February 01 2006
An on-line optimisation of a SBR cycle for carbon and nitrogen removal based on on-line pH and OUR: the role of dissolved oxygen control
S. Puig;
*Laboratory of Chemical and Environmental Engineering (LEQUIA), Institute of Environment (IMA-UdG), University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain,
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Ll. Corominas;
Ll. Corominas
*Laboratory of Chemical and Environmental Engineering (LEQUIA), Institute of Environment (IMA-UdG), University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain,
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A. Traore;
A. Traore
*Laboratory of Chemical and Environmental Engineering (LEQUIA), Institute of Environment (IMA-UdG), University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain,
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J. Colomer;
J. Colomer
**Control Engineering and Intelligent Systems Group (eXIT), Institute of Informatics and Applications (IIiA), University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain
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M.D. Balaguer;
M.D. Balaguer
*Laboratory of Chemical and Environmental Engineering (LEQUIA), Institute of Environment (IMA-UdG), University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain,
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J. Colprim
J. Colprim
*Laboratory of Chemical and Environmental Engineering (LEQUIA), Institute of Environment (IMA-UdG), University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain,
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Water Sci Technol (2006) 53 (4-5): 171–178.
Citation
S. Puig, Ll. Corominas, A. Traore, J. Colomer, M.D. Balaguer, J. Colprim; An on-line optimisation of a SBR cycle for carbon and nitrogen removal based on on-line pH and OUR: the role of dissolved oxygen control. Water Sci Technol 1 February 2006; 53 (4-5): 171–178. doi: https://doi.org/10.2166/wst.2006.121
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