A specialized mixotrophic microbial consortium enriched in a continuous electrostimulated bioreactor operated at a constant potential of 300 mV for CO2 conversion into volatile fatty acids. Decreasing hydraulic retention time (HRT) selected for a spatially organized community in which Enterococcus and Clostridium dominated the planktonic phase while Desulfovibrio and Enterococcus were enriched in the electrode biofilm. This syntrophic organization enhanced biomass-specific inorganic carbon removal and redirected carbon flux toward acetate, a key product of acetogenic pathways, with electrode-associated taxa contributing reducing equivalents that supported autotrophic CO2/HCO3- fixation.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| Enterococcus | NCBITaxon:1350 |
SECONDARY_FERMENTER
SYNTROPHIC_PARTNER
|
N/A |
|
|||
| Clostridium | NCBITaxon:1485 |
PRIMARY_PRODUCER
SYNTROPHIC_PARTNER
|
N/A |
|
|||
| Desulfovibrio | NCBITaxon:872 |
ELECTROTROPH
SYNTROPHIC_PARTNER
|
N/A |
|
|||
Ecological Interactions
Spatially organized syntrophy enhancing inorganic carbon removal
SYNTROPHYSource Taxon: Desulfovibrio
Target Taxon: Enterococcus
Metabolites: acetate (CHEBI:30089)
Evidence
-
doi:10.21203/rs.3.rs-9518331/v1 - SUPPORT (IN_VITRO)"This syntrophic organization enhanced biomass-specific IC removal by 2.6-fold"
-
doi:10.21203/rs.3.rs-9518331/v1 - SUPPORT (IN_VITRO)"redirected carbon flux toward acetate, a key product of acetogenic pathways"