The phenomenon of wastewater sample aging is supposed to be treated with a low temperature autosampler. This work presents two examples of treated wastewater, the quality of which varies with the time of conservation. This evolution may pose some problems with respect to regulation compliance or process control. After the explanation of the mechanisms involved in sample aging, some recommendations are proposed in order to improve the UV off-line measurement of TSS and COD of treated wastewater.
In situ UV monitoring of wastewater: a response to sample aging
E. Baurès, C. Berho, M.-F. Pouet, O. Thomas; In situ UV monitoring of wastewater: a response to sample aging. Water Sci Technol 1 January 2004; 49 (1): 47–52. doi: https://doi.org/10.2166/wst.2004.0015
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