A new respirometric method for COD fractionation was applied to various wastewaters collected on French treatment plants. Great variations were observed especially in the readily biodegradable fraction (RBCOD) ranging from 1 to 16% of total COD. Variability of the results among the origin can be explained by the reactions occurring in the sewers. In one of the towns studied, the wastewater samples collected directly in the sewer show COD characteristics very different from the sewage which reaches the treatment plant. By analysing the same wastewater after aerobic and anaerobic storage, it was proved that RBCOD respectively decreased or increased significantly. Seasonal fluctuations were also quantified, showing that RBCOD fraction decreased from 75 mg/L to –15 mg/L during the summer whereas the variation of soluble fraction was less important.
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Research Article|
January 01 2001
Application of COD fractionation by a new combined technique: comparison of various wastewaters and sources of variability
M. Spérandio;
M. Spérandio
1LIPE, dépt GPI, Complexe scientifique de Rangueil, INSA, Toulouse, 31077, France
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V. Urbain;
V. Urbain
2CIRSEE-Suez-Lyonnaise-des-Eaux, 38 Rue du Président Wilson, Le Pecq, 78230, France
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P. Ginestet;
P. Ginestet
2CIRSEE-Suez-Lyonnaise-des-Eaux, 38 Rue du Président Wilson, Le Pecq, 78230, France
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M. J. Audic;
M. J. Audic
2CIRSEE-Suez-Lyonnaise-des-Eaux, 38 Rue du Président Wilson, Le Pecq, 78230, France
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E. Paul
E. Paul
1LIPE, dépt GPI, Complexe scientifique de Rangueil, INSA, Toulouse, 31077, France
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Water Sci Technol (2001) 43 (1): 181–190.
Citation
M. Spérandio, V. Urbain, P. Ginestet, M. J. Audic, E. Paul; Application of COD fractionation by a new combined technique: comparison of various wastewaters and sources of variability. Water Sci Technol 1 January 2001; 43 (1): 181–190. doi: https://doi.org/10.2166/wst.2001.0044
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