Biodechlord : à la recherche de traces de dégradation microbienne du chlordécone dans les sols contaminés des Antilles

Session 5 - Milieux impactés / Impacted mediaSession 5 - Milieux impactés / Impacted media; Objectives: Chlordecone was intensively used in the French West Indies (FWI) to control the banana weewil. Recent surveys showed that arable soils cropped with banana, representing up to 20,000 ha, are contaminated this insecticide with concentrations ranging between 0.2 and 37.4 mg kg−1. Chlordecone was classified as a persistent organic pollutant in May 2009. It is not only contaminating soil resources but also water resources where it is often detected. This insecticide is bioaccumulated in different plant and animals thereby contaminating the food chain causing an important human health. This con…

Membres du comité d’organisation scientifique

EA BIOME INRA; National audience

Membres du comité d'organisation scientifique

Unexpected high production of biohydrogen from the endogenous fermentation of grape must deposits

International audience; The aim of this work was to assess the performances of wine byproduct biomass for hydrogen production by dark fermentation. Grape must deposits from two grape varieties (Pinot Gris and Chardonnay) were considered, either with external microbial inoculum or without. We show that grape must residues contain endogenous microflora, well adapted to their environment, which can degrade sugars (initially contained in the biomass) to hydrogen without any nutrient addition. Indeed, hydrogen production during endogenous fermentation is as efficient as with an external heat-treated inoculum (2.5 ± 0.4 LH2.L-1reactor and 1.61 ± 0.41 molH2.mol-1consumed hexose, respectively) with…