Wastewater-treatment plant, aggregation

Table 16.18 gives an overview of the implementation of the processes described in the third section in typical biogeochemical models of rivers, lakes, oceans, sediments and wastewater treatment plants. Of the processes described in detail above (Tables 16.3-16.15), the two last processes of mineralization and oxidation are more aggregated... 

The relation between concentration and flow is clearly shown in this example. Indeed, flow rates and UV spectra present the same variation. During the night, the sample presents a spectrum characterised by a monotonous shape without any shoulder. This can be easily related to a low domestic activity. On the contrary, day time spectra present a more important pattern, with the shoulder associated to the presence of surfactants. A correlation between the values of flow rates and aggregate parameters plus some specific compounds (detergents) could easily be established. This example shows that the knowledge of time variation in wastewater quality is very important for sewer and treatment plant management. 

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