An engineered waste-activated-sludge electro-fermentation community with spatially differentiated electrode-biofilm and planktonic fractions. The source reports biofilm-associated reductive debromination of 4-bromophenol and suspension-associated acidogenesis for volatile-fatty-acid recovery. The five genera recorded here are enriched functional examples, not an exhaustive inventory of the sludge community.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| Syntrophomonas | NCBITaxon:862 · TaxonMech · TraitMech |
SYNTROPHIC_PARTNER
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N/A |
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| Geobacter | NCBITaxon:28231 · TaxonMech · TraitMech |
ELECTROGEN
SYNTROPHIC_PARTNER
|
N/A |
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| Hydrogenophaga | NCBITaxon:47420 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
|
N/A |
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| Sedimentibacter | NCBITaxon:190972 · TaxonMech · TraitMech |
SECONDARY_FERMENTER
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N/A |
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| Petrimonas | NCBITaxon:307628 · TaxonMech · TraitMech |
SECONDARY_FERMENTER
|
N/A |
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Ecological Interactions
The graph shows only explicitly linked interaction participants. Community members without an asserted participant link are omitted; membership alone does not imply an interaction.
Biofilm-Suspension Spatial Division of Labor
NICHE_PARTITIONINGMulti-omics supports a spatial division of labor in the waste-sludge reactor: electrode biofilms are primarily associated with reductive debromination and planktonic suspensions with acidogenesis. The five listed genera are representative enrichments, not an exhaustive membership or a defined five-strain consortium.
Biological Processes:
- biological process involved in interspecies interaction between organisms (GO:0044419 · PathwayMech)
Evidence
-
PMID:41793807 - SUPPORT (IN_VITRO)"Multi-omics analysis revealed a distinct spatial division of labor"
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PMID:41793807 - SUPPORT (IN_VITRO)"Electrode biofilms primarily governed reductive debromination"
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PMID:41793807 - SUPPORT (IN_VITRO)"planktonic suspensions mainly drove acidogenesis"
Biofilm Electroactivity and Dehalogenation
Biofilm enrichment associates Syntrophomonas and Geobacter with electroactivity and Hydrogenophaga with dehalogenation. These are representative genus-level roles inferred from enrichment and multi-omics, not separately measured electron or dehalogenation fluxes for every genus or evidence of niche partitioning within this fraction.
Participating Taxa: Syntrophomonas, Geobacter, Hydrogenophaga
Biological Processes:
- biological process involved in interspecies interaction between organisms (GO:0044419 · PathwayMech)
Evidence
-
PMID:41793807 - SUPPORT (IN_VITRO)"enriching electroactive bacteria (e.g., Syntrophomonas and Geobacter) and dehalogenators (e.g., Hydrogenophaga)"
Suspension Acidogenesis
Suspension enrichment associates Sedimentibacter and Petrimonas with fermentation, hydrolysis, fatty-acid biosynthesis and acidogenesis. These representative roles do not assign all activities to each genus or establish niche partitioning between the two genera.
Participating Taxa: Sedimentibacter, Petrimonas
Biological Processes:
- biological process involved in interspecies interaction between organisms (GO:0044419 · PathwayMech)
Evidence
-
PMID:41793807 - SUPPORT (IN_VITRO)"enriching fermentative bacteria (e.g., Sedimentibacter and Petrimonas) and accelerating hydrolysis and fatty acid biosynthesis pathways"
Modeled EET support for biofilm-suspension cooperation
PARTIAL: partial least squares path modeling identifies extracellular electron transfer as a factor supporting cooperation between the biofilm and suspension and their dehalogenation and acidogenesis outputs. The authors call this syntrophy, but the abstract does not resolve a product-removal thermodynamic dependency, obligatory reciprocal growth or a direct EET interruption/rescue experiment.
Biological Processes:
- biological process involved in interspecies interaction between organisms (GO:0044419 · PathwayMech)
PARTIAL: the path model links EET to biofilm-associated dehalogenation. Retain this inferred contribution, not a directly perturbed EET-to-output mechanism or a flux assigned to each representative genus.
PARTIAL: the path model links EET to suspension-associated acidogenesis. Retain this inferred contribution, not a directly perturbed EET-to-output mechanism or a flux assigned to each representative genus.
Evidence
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PMID:41793807 - PARTIAL (COMPUTATIONAL)"Partial least squares path modeling identified extracellular electron transfer as the key factor"
Knowledge gaps & discussions (1)
KNOWLEDGE_GAP OPEN Which electron-transfer route causally links the biofilm and suspension outputs?
The accessible abstract identifies a partial least squares path model, not the route-resolved inhibition/rescue or partner-fitness controls needed to isolate EET mediation and thermodynamic dependence. Full methods and relevant perturbation data are needed; compartment enrichment and reactor-level removal/carbon recovery remain supported.
Attaches to: ecological_interactions#Biofilm-Suspension Spatial Division of Labor, ecological_interactions#Biofilm Electroactivity and Dehalogenation, ecological_interactions#Suspension Acidogenesis, ecological_interactions#Modeled EET support for biofilm-suspension cooperation
1 evidence item(s)
Partial least squares path modeling identified extracellular electron transfer as the key factor
External Resources
| Name | Repository | Resource ID |
|---|---|---|
|
Primary publication - biofilm-suspension electro-fermentation syntrophy
Primary multi-omics study of spatial division of labor in the waste-sludge electro-fermentation community. |
OTHER | PMID:41793807 |
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Environmental Factors
| Factor | Value | Unit |
|---|---|---|
| Waste activated sludge feedstock | waste activated sludge | N/A |
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| Halogenated model pollutant | 4-bromophenol | N/A |
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| Community performance | 97.4% 4-bromophenol removal; 40.2% higher VFA production than control | N/A |
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Growth Media
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