The CHLOR2NOU project aims to develop new monitoring tools for CLD and its TPs, to provide new knowledge on the fate and risk of CLD TPs, and to explore realistic alternative approaches for pollution remediation. The postulate of the non-degradability of CLDs commonly admitted for several decades has had a strong negative impact on pollution management by ruling out the possibility of CLD degradation. The representation of CLD in the FWI society and in the scientific community is therefore of paramount importance. The CHLOR2NOU project is divided into 7 Work Packages that bring together scientists from various background: the WP1 with the synthesis of CLD TPs, CLD baits and fluorescent macromolecular cages; the WP2 that deals with innovative analytical methods: (i) routine laboratory method for the detection of CLD TPs in environmental and food matrices, (ii) immunoassay using a CLD-selective antibody, (iii) a semi-high-throughput detection protocol based on the recognition of CLD by a fluorescent macromolecular cage; the WP3 dedicated to toxicological and ecotoxicological studies in order to define the toxicity profile of CLD TPs; the WP4 with several analytical campaigns to obtain a first estimate of the possible exposure to CLD TPs; the WP5 that aims at studying the fate of CLD TPs, in particular in FWI soils, while defining degradation indicators; the WP6 that is focused on the study of realistic agronomic and environmental conditions capable to favor CLD degradation; the last WP centered on the representation of CLD in the FWI society at large. A co-construction method will be used to help the population and stakeholders to better assimilate the scientific results.

Caribbean are facing massive and random arrivals of sargassum, pelagic algae that cause potential health issues for the local population during stranding events and also impact tourist activity in the islands. The partners of this project have developed an agro-ecological anaerobic digestion (AD) expertise based on agro-resources. Sargassum processing via anaerobic digestion is intended to produce energy, mineral fertilizers and/or organic amendments. As stranding events occur randomly, sargassum has to be co-valorized with other local bio-resources in order to favor a continuous process. The project involves all the actors that will intervene/take part in sargassum processing, i.e., from collecting sargassum and local bio-resources to producing energy and valorizing the digestates as amendments and/or fertilizers. The levels and presence of heavy metals specific to sargassum will be carefully checked and controlled throughout the valorization process. A first step will consist in qualifying the various sargassum processing pathways with a Multicriteria Life Cycle Analysis (LCA): composting, incineration, anaerobic digestion. Then, in a second step, the project will delineate the sargassum collection areas, and define the two forms of stabilized preservation processes – dried / siled – under controlled sanitary conditions. In a third step, the project will characterize the optimal conditions of anaerobic digestion of various formulations including sargassum and local bioresources. Thus, one of the objectives of the project is to suggest scenarios that take the overall territorial valorization of sargassum into account together with local bioresources at the scale of the French West Indies. The valorization process will also include the agronomic characterization of the resulting digestates based on experimental data, taking the absence of harmful elements into account.