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Process type is the key driver of the fate of organic micropollutants during industrial scale treatment of organic wastes

Abstract : Organic micropollutants (OMPs) such as polycyclic aromatic hydrocarbons, nonylphenols and pharmaceuticals products are ubiquitous in organic wastes generated by most human activities. Those wastes are mainly recycled by land spreading, most often after treatments, such as liming, dewatering, composting or anaerobic digestion. It has been shown essentially at lab scales that biological treatments have an effect on the removal of some OMPs. However, less is known on the role of each step of industrial treatment lines combining physico-chemical and biological treatments on the OMP fate and removal. The present study focuses on the impact of waste treatment on the fate of 53 OMPs along 10 industrial treatment lines treating urban, agricultural wastes or mixtures. The combination of studying a diversity of organic wastes and of OMPs with different characteristics (solubility, ionic charges, hydrophobicity etc.), sampling in situ industrial sites, quantifying native OMP concentrations and looking at each step of complete treatment lines allows for a global and representative view of the OMP fate in the French organic waste treatment sector. Less studied wastes, i.e. territorial mixtures, revealed intermediate OMP contents and compositions, between urban and agricultural wastes. Dewatering and liming, usually dismissed, had a noticeable effect on concentrations. Anaerobic digestion and composting had significant effects on the removal of all pollutant families. Combination of processes enhanced most OMP dissipation. Here we showed for the first time that the process type rather than the waste origin affects dissipation of organic micropollutants. Such data could be used to build and validate dynamic models for the fate of OMPs on solid waste treatment plants.
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Submitted on : Friday, April 29, 2022 - 5:40:55 PM
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Nicolas Sertillanges, Claire-Sophie Haudin, Marjolaine Bourdat-Deschamps, Nathalie Bernet, Valentin Serre, et al.. Process type is the key driver of the fate of organic micropollutants during industrial scale treatment of organic wastes. Science of the Total Environment, Elsevier, 2020, 734, pp.139108. ⟨10.1016/j.scitotenv.2020.139108⟩. ⟨hal-03655635⟩



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