Abstract
Gaining rapid knowledge of dissolved organic matter (DOM) proves to be decisive for wastewater treatment plant operators in efforts to achieve good treatment efficiency in light of current legislation. DOM can be monitored by application of fluorescence spectroscopy both online and in real time in order to derive an assessment of DOM oxidation potential. This work presents an eco-friendly alternative method for measuring the soluble chemical oxygen demand (COD) in raw sewage by means of three-dimensional fluorescence spectroscopy. A peak-picking approach has been developed based on a previous parallel factor analysis (PARAFAC) model dedicated to Paris raw sewage. Fluorescence spectroscopy parameters were used to obtain a good prediction model of soluble COD (r2 = 0.799; p < 0.0001; n = 80) for raw sewage. The approach employed in this study serves as a guideline for purposes of implementing online wastewater monitoring and conducting environmentally friendly soluble COD measurements in the laboratory.
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The authors gratefully acknowledge the French Ministry of Research and the MOCOPEE Research Program for their support. Thanks are also addressed to the SIAAP Laboratory for having conducted the global parameter analyses.
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Goffin, A., Guérin-Rechdaoui, S., Rocher, V. et al. An environmentally friendly surrogate method for measuring the soluble chemical oxygen demand in wastewater: use of three-dimensional excitation and emission matrix fluorescence spectroscopy in wastewater treatment monitoring. Environ Monit Assess 191, 421 (2019). https://doi.org/10.1007/s10661-019-7570-5
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DOI: https://doi.org/10.1007/s10661-019-7570-5