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Rejets de micropolluants : un essai de comparaison économique entre traitement et substitution à la source

Abstract : The numerous micropollutants generated by human activity are likely to significantly alter the quality of watercourses, especially when crossing large agglomerations. The study deals with the economic efficiency of different approaches to the management of urban micropollutants: we compare the cost of not emitting micropollutant streams from an agglomeration, either by substituting chemicals them at source, or by tertiary treatment in urban wastewater treatment plants. This comparison is carried out in two contrasting contexts of pollution : in the first case, we focused on current hazardous substances of the WFD (i.e. regulated substances) and in a second one we selected a list of 23 additional emerging substances. The comparison between treatment and substitution is carried out for the case of the wastewater treatment plant of a city of 200,000 eq.hab and the results tend to show that the substitution costs are lower than the costs of tertiary treatment by nanofiltration and activated carbon. However, given numerous uncertainties and assumptions, this exploratory study should be confirmed by more in-depth work, including other micropollutants and other tertiary treatment techniques. It anyway already appears to signal the interest of preventive and integrated strategies to control chemical risks.
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Jean-Marc Brignon, Carmen Cantuarias, Valentin Chapon, Enrico Mombelli. Rejets de micropolluants : un essai de comparaison économique entre traitement et substitution à la source. Techniques Sciences Méthodes , ASTEE/EDP Sciences, 2019, pp.27-40. ⟨10.1051/tsm/201903027⟩. ⟨ineris-03318118⟩



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