This paper describes the use of a Fourier Transform Infra-Red (FT-IR) spectrometer as an on-line sensor to measure Chemical Oxygen Demand (COD), Total Organic Carbon (TOC), Volatile Fatty Acids (VFA), and Partial and Total Alkalinity (PA and TA) in anaerobic digestion processes for the treatment of industrial wastewaters. Comparison with manual off-line analysis and with an on-line industrial TOC analyser and an on-line titrimetric sensor (for the measurements of VFA, TA and PA) are provided to demonstrate the interest of spectral analysis in the mid infra-red domain for the monitoring of anaerobic digestion processes. In order to further illustrate the advantages of using such a technique, on-line measurements recorded during an accident of the pH regulation in the input (pH in the reactor went above 11 and biomass activity stopped) are shown. They demonstrate that, if carefully performed, the calibration can be extended outside its range while being still compatible with requirements of wastewater treatment processes.
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Research Article|
May 01 2002
On-line measurements of COD, TOC, VFA, total and partial alkalinity in anaerobic digestion processes using infra-red spectrometry
J.P. Steyer;
1Laboratoire de Biotechnologie de l'Environnement, LBE – INRA, Avenue des étangs, 11100 Narbonne, France
E-mail: steyer@ensam.inra.fr
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J.C. Bouvier;
J.C. Bouvier
1Laboratoire de Biotechnologie de l'Environnement, LBE – INRA, Avenue des étangs, 11100 Narbonne, France
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T. Conte;
T. Conte
1Laboratoire de Biotechnologie de l'Environnement, LBE – INRA, Avenue des étangs, 11100 Narbonne, France
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P. Gras;
P. Gras
1Laboratoire de Biotechnologie de l'Environnement, LBE – INRA, Avenue des étangs, 11100 Narbonne, France
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J. Harmand;
J. Harmand
1Laboratoire de Biotechnologie de l'Environnement, LBE – INRA, Avenue des étangs, 11100 Narbonne, France
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J.P. Delgenes
J.P. Delgenes
1Laboratoire de Biotechnologie de l'Environnement, LBE – INRA, Avenue des étangs, 11100 Narbonne, France
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Water Sci Technol (2002) 45 (10): 133–138.
Citation
J.P. Steyer, J.C. Bouvier, T. Conte, P. Gras, J. Harmand, J.P. Delgenes; On-line measurements of COD, TOC, VFA, total and partial alkalinity in anaerobic digestion processes using infra-red spectrometry. Water Sci Technol 1 May 2002; 45 (10): 133–138. doi: https://doi.org/10.2166/wst.2002.0310
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J.P. Steyer, J.C. Bouvier, T. Conte, P. Gras, J. Harmand, J.P. Delgenes; On-line measurements of COD, TOC, VFA, total and partial alkalinity in anaerobic digestion processes using infra-red spectrometry. Water Sci Technol 1 May 2002; 45 (10): 133–138. doi: https://doi.org/10.2166/wst.2002.0310
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