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Taxonomic composition at the family level of the microbial communities enriched at the anodes, in the bulk anolyte of reactors polarized at 0 mV and +300 mV (versus an Ag/AgCl [3 M KCl] reference electrode), and in the sediment used as the inoculum. The families with a relative abundance of 5% (or higher) are reported. Sulfate reducers and sulfur reducers were enriched during the bioelectrochemical treatment.
