Abstract
Based on an experimental database consisting of 194 daily cases, artificial neural networks were used to model the removal efficiency of a biofilter for treating hydrogen sulphide (H2S). In this work, the removal efficiency of the reactor was considered as a function of the changes in the air flow and concentration of H2S entering the biofilter. In order to obtain true representative values, the removal efficiencies (outputs) were measured 24 h after each input was changed. A MLP (multilayer perceptron 2-2-1) model with two input variables (unit flow and concentration of the contaminant fed into the biofilter) rendered good prediction values with a determination coefficient of 0.92 for the removal efficiency within the range studied. This means that the MLP model can explain 92% of the overall variability detected in the biofilter corresponding to a wide range of operating conditions.
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Abbreviations
- ANN:
-
Artificial neural network
- b 1 and b 0 :
-
Slope and intercept, respectively, of a least-squares regression between the predicted and observed data
- C :
-
Concentration of H2S fed to the reactor
- d :
-
Index of agreement
- RE:
-
Removal efficiency
- FA2:
-
Fraction of two
- MLR:
-
Multiple linear regression
- MLP:
-
Multilayer perceptron
- Q u :
-
Unit flow
- R :
-
Pearson correlation coefficient
- R 2 :
-
Determination coefficient
- R m :
-
Ratio of means
- RMSE:
-
Total root mean squared error
- R st :
-
The ratio of the systematic error component to total RMSE
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Acknowledgements
The authors wish to thank the Basque Government (BERRILUR project No. IE03-110), the Spanish Government (MCYT PPQ2002-01088 with FEDER funding) and the University of the Basque Country (UPV 00149.345-E-15398/2003 project) for the financial support to develop this research. Special thanks are given to the EUVE for the lab-scale pilot plant simulation.
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Elías, A., Ibarra-Berastegi, G., Arias, R. et al. Neural networks as a tool for control and management of a biological reactor for treating hydrogen sulphide. Bioprocess Biosyst Eng 29, 129–136 (2006). https://doi.org/10.1007/s00449-006-0062-3
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DOI: https://doi.org/10.1007/s00449-006-0062-3
Keywords
- Bioreactors
- Artificial neural networks
- Numerical analysis
- Statistical modelling
- Hydrogen sulphide