A posteriori assessment of ecotoxicological risks linked to building a hospital

Abstract : Hospital wastewater (HWW) contain a large number of chemical pollutants such as disinfectants, sur- factants, and pharmaceutical residues. A part of these pollutants is not eliminated by traditional urban wastewater treatment plants (WWTP), leading to a risk for the aquatic ecosystems receiving these ef- ␣uents. In order to assess this risk, we formulated a speci␣c methodology based on the ecotoxicological characterisation of the hospital wastewater using a battery of three chronic bioassays (Pseudokirchneriella subcapitata, Heterocypris incongruens and Brachionus calyci␣orus). We used it for the posteriori risk assessment of a hospital recently built in south-east France, and we studied the evolution of this risk during two years. We also used it to assess the decrease of the ecotoxicological risk after treatment of the ef␣uent in a speci␣c line of the local WWTP. Lastly, we compared these results with the risk assessment made before the building of the hospital in the context of a priori risk assessment. The results obtained showed an important evolution of the risk overtime, according to the hospital activities and the river ␣ows, and a real decrease of the risk after treatment in the dedicated line. They also showed that the a priori assessment of ecotoxicological risks, made previously, was overstated, mainly because of the application of the precautionary principle.
Type de document :
Article dans une revue
Chemosphere, Elsevier, 2016, 144, pp.440-445. 〈10.1016/j.chemosphere.2015.08.075〉
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Soumis le : mercredi 2 mars 2016 - 15:07:58
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Yves Perrodin, Christine Bazin, Frédéric Orias, Adriana Wigh, Thérèse Bastide, et al.. A posteriori assessment of ecotoxicological risks linked to building a hospital. Chemosphere, Elsevier, 2016, 144, pp.440-445. 〈10.1016/j.chemosphere.2015.08.075〉. 〈hal-01281657〉



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