Waste-Sludge Electro-Fermentation Biofilm-Suspension Community

Community ID CommunityMech:000328

Ecological State ENGINEERED

Environment waste-activated-sludge electro-fermentation reactor
ENVO:01001405

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	SYNTROPHIC_PARTNER	N/A
PMID:41793807 - SUPPORT (IN_VITRO) "enriching electroactive bacteria (e.g., Syntrophomonas and Geobacter)"
Geobacter	NCBITaxon:28231	ELECTROGEN SYNTROPHIC_PARTNER	N/A
PMID:41793807 - SUPPORT (IN_VITRO) "enriching electroactive bacteria (e.g., Syntrophomonas and Geobacter)"
Hydrogenophaga	NCBITaxon:47420	PRIMARY_DEGRADER	N/A
PMID:41793807 - SUPPORT (IN_VITRO) "dehalogenators (e.g., Hydrogenophaga)"
Sedimentibacter	NCBITaxon:190972	SECONDARY_FERMENTER	N/A
PMID:41793807 - SUPPORT (IN_VITRO) "enriching fermentative bacteria (e.g., Sedimentibacter and Petrimonas)"
Petrimonas	NCBITaxon:307628	SECONDARY_FERMENTER	N/A
PMID:41793807 - SUPPORT (IN_VITRO) "enriching fermentative bacteria (e.g., Sedimentibacter and Petrimonas)"

Ecological Interactions

Taxon

Syntrophy

Niche partitioning

Biofilm-Suspension Spatial Division of Labor

NICHE_PARTITIONING

Evidence

PMID:41793807 - SUPPORT (IN_VITRO)

"Multi-omics analysis revealed a distinct spatial division of labor"
PMID:41793807 - SUPPORT (IN_VITRO)

"Electrode biofilms primarily governed reductive debromination"
PMID:41793807 - SUPPORT (IN_VITRO)

"planktonic suspensions mainly drove acidogenesis"

Biofilm Electroactivity and Dehalogenation

NICHE_PARTITIONING

Evidence

PMID:41793807 - SUPPORT (IN_VITRO)

"enriching electroactive bacteria (e.g., Syntrophomonas and Geobacter) and dehalogenators (e.g., Hydrogenophaga)"

Suspension Acidogenesis

NICHE_PARTITIONING

Evidence

PMID:41793807 - SUPPORT (IN_VITRO)

"enriching fermentative bacteria (e.g., Sedimentibacter and Petrimonas) and accelerating hydrolysis and fatty acid biosynthesis pathways"

EET-Reinforced Biofilm-Suspension Syntrophy

SYNTROPHY

Evidence

PMID:41793807 - SUPPORT (IN_VITRO)

"extracellular electron transfer as the key factor reinforcing this biofilm-suspension syntrophy, significantly contributing to both dehalogenation and acidogenesis"

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
PMID:41793807 - SUPPORT (IN_VITRO) "This work investigated the cooperation between biofilms and suspensions in EFS"

Environmental Factors

Factor	Value	Unit
Waste activated sludge feedstock	waste activated sludge	N/A
PMID:41793807 - SUPPORT (IN_VITRO) "Electro-fermentation systems (EFS) offer a promising approach for waste activated sludge valorization"
Halogenated model pollutant	4-bromophenol	N/A
PMID:41793807 - SUPPORT (IN_VITRO) "4-bromophenol, 4-BP, as model pollutant"
Community performance	97.4% 4-bromophenol removal; 40.2% higher VFA production than control	N/A
PMID:41793807 - SUPPORT (IN_VITRO) "achieving 97.4% removal of 4-BP while increasing VFAs production by 40.2% compared to the control"

Growth Media

Waste-activated-sludge electro-fermentation matrix

Preparation notes: The abstract identifies waste activated sludge and 4-bromophenol but does not report basal medium composition, loading, pH, temperature, atmosphere, or electrode materials.

Evidence

PMID:41793807

"EFS designed to synchronize carbon recovery (volatile fatty acid, VFAs) production and halogenated contaminant degradation (4-bromophenol, 4-BP, as model pollutant)"