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"id": "MGYS00001569",
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"accession": "MGYS00001569",
"bioproject": "PRJEB5060",
"samples-count": 3,
"is-private": false,
"last-update": "2017-03-13T13:54:14",
"secondary-accession": "ERP004419",
"centre-name": "EESC/USP",
"public-release-date": null,
"study-abstract": "Anaerobic biomass was used as inoculum in batch reactors undergoing fermentative-methanogenic conditions aiming to removal PCBs congeners (0.7 mg mL-1). Ethanol (460 mg L-1) and sodium formate (680 mg L-1) was used as co-substrate and polyurethane foam (PF) as support for biomass immobilization. Control reactors (RWCS, RCS and RCS-PF) did not contain PCBs, and biomass received a heat-treatment (RCS-PCB-HT). Ethanol and sodium formate stimulate the metabolism of biomass, since there was an increased methane production in reactors RCS and RCS-PF. The low yield of methane in reactors RCS-PCB and RCS-PCB-PF suggests an inhibitory effect of PCB over the methanogenic community. Reactors RCS-PCB presented a substantial reduction of the initial concentration of PCBs from 0.7 to 0.2 mg mL-1 after 60 days. For domain Bacteria, the reactors with PCBs (RCS-PCB and RCS-PCB-PF) were grouped with 86% similarity and only 55% with free-PCBs reactors (RWCS, RCS and RCS-PF) suggesting a selection of specific population in the presence of PCBs. For Archaea domain the reactors RCS-PCB and RCS-PCB-PF were grouped with 94% similarity and those without PCBs (RWCS, RCS and RCS-PF) with 86%. However, between these groups the similarity was 59% indicating that besides the selection of specific populations induced by PCBs the variation was not as evident as observed for the Bacteria domain. Reactors containing PCBs (RCS-PCB and RCS-PCB-PF) had an increased prevalence of Firmicutes and Chloroflexi phyla and, a pronounced relative abundance of Sedimentibacter, (7.4 and 12.4, respectively) a bacterium correlated with reductive dechlorination of PCBs.",
"study-name": "Assessing polychlorinated biphenyl degradation by an anaerobic microbial consortium in batch reactors with biofilm",
"data-origination": "SUBMITTED"
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