In this work we present and discuss the design of an array of soft-sensors to estimate the nitrate concentration in the denitrifying post-filtration unit at the Viikinmäki wastewater treatment plant in Helsinki (Finland). The developed sensors aim at supporting the existing hardware analyzers by providing a reliable back-up system in case of malfunction of the instruments. In the attempt to design easy to implement and interpretable sensors, computationally light linear models have been considered. However, due to the intrinsic nonlinearity of the process, also nonlinear but still computationally affordable models have been considered for comparison. The experimental results demonstrate the potential of the developed soft-sensors and the possibility for an on-line implementation in the plant's control system as alternative monitoring devices.
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Research Article|
April 01 2012
Nitrate estimation in the denitrifying post-filtration unit of a municipal wastewater treatment plant: the Viikinmäki case Available to Purchase
M. Mulas;
1Aalto University, Dept. of Civil and Environmental Engineering, P.O. Box 15200, FI-00076 Aalto, Finland
E-mail: [email protected]
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F. Corona;
F. Corona
2Aalto University, Dept. of Information and Computer Science, P.O. Box 15400, FI-00076 Aalto, Finland
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H. Haimi;
H. Haimi
1Aalto University, Dept. of Civil and Environmental Engineering, P.O. Box 15200, FI-00076 Aalto, Finland
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L. Sundell;
L. Sundell
3HSY Helsinki Region Environmental Services Authority, P.O. Box 100, FI-00066 HSY, Finland
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M. Heinonen;
M. Heinonen
3HSY Helsinki Region Environmental Services Authority, P.O. Box 100, FI-00066 HSY, Finland
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R. Vahala
R. Vahala
1Aalto University, Dept. of Civil and Environmental Engineering, P.O. Box 15200, FI-00076 Aalto, Finland
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Water Sci Technol (2012) 65 (8): 1521–1529.
Article history
Received:
August 18 2011
Accepted:
December 12 2011
Citation
M. Mulas, F. Corona, H. Haimi, L. Sundell, M. Heinonen, R. Vahala; Nitrate estimation in the denitrifying post-filtration unit of a municipal wastewater treatment plant: the Viikinmäki case. Water Sci Technol 1 April 2012; 65 (8): 1521–1529. doi: https://doi.org/10.2166/wst.2012.038
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