A native groundwater microbial consortium enriched in Dehalococcoides mccartyi (Dhc) strain CWV2, a strain capable of completely dechlorinating vinyl chloride (VC) to non-toxic ethene. The consortium remediates trichloroethene (TCE)-contaminated groundwater; amendment with biochar (BC600) derived from Zizania latifolia husks enhances microbial colonization and activity, accelerating TCE degradation and reducing VC accumulation. Community analysis indicates biochar promotes syntrophic hydrogen producers and electroactive bacteria that supply reducing equivalents and ensure long-term dechlorination stability.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| Dehalococcoides mccartyi strain CWV2 — ontology label: Dehalococcoides mccartyi | NCBITaxon:61435 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
SYNTROPHIC_PARTNER
|
N/A |
|
|||
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.
BC600 Biochar-Consortium Coupling
The strategy amends a native Dhc-containing groundwater consortium with Zizania latifolia husk biochar produced at 600 degrees C. The author-uploaded proof distinguishes consortium D345 from CWV2; the graph does not treat the isolate and the complete community as identical.
Metabolites: trichloroethene (CHEBI:16602 · MediaIngredientMech · CMMMech)
BC600 amendment supplies sorptive surfaces and is associated with enhanced microbial colonization and activity in the tested consortium. Amendment effects depend on dose and inoculum conditions; this does not establish that adsorption itself is biological dechlorination.
Evidence
-
PMID:41442978 - SUPPORT (IN_VITRO)"integrates biochar derived from Zizania latifolia (water bamboo) husks with a native microbial consortium"
BC600 Colonization and Activity Enhancement
BC600 was selected for adsorption performance and practical cost considerations and was associated with enhanced microbial colonization and activity. The proof reports slightly greater sorption for BC700, so BC600 is not asserted to have the strongest adsorption. Sorption and biological transformation remain distinct processes.
Metabolites: trichloroethene (CHEBI:16602 · MediaIngredientMech · CMMMech)
PARTIAL - biochar-associated microbial colonization and activity could contribute to faster TCE transformation, alongside sorption and bioavailability effects. The amendment comparison does not selectively isolate colonization as the causal mediator, and TCE disappearance through adsorption is not itself degradation.
Evidence
-
PMID:41442978 - PARTIAL (IN_VITRO)"Biochar (BC600) demonstrated optimal adsorption while enhancing microbial colonization and activity"
Biochar-Accelerated TCE Degradation
BC600 amendment accelerated TCE transformation in the tested native-consortium experiments. Removal includes a sorption contribution and must not be equated wholesale with biological degradation. Dose and inoculum comparisons differ; faster TCE transformation alone does not imply lower vinyl-chloride accumulation.
Target Taxon: Dehalococcoides mccartyi strain CWV2
Metabolites: trichloroethene (CHEBI:16602 · MediaIngredientMech · CMMMech)
Evidence
-
PMID:41442978 - SUPPORT (IN_VITRO)"leading to accelerated TCE degradation"
Vinyl Chloride Accumulation Mitigation
A separate high-inoculum BC600 experiment reported lower peak vinyl-chloride accumulation, consistent with support for downstream dechlorination. In lower-inoculum comparisons, biochar could instead increase vinyl chloride while unamended controls retained TCE. CWV2 vinyl-chloride-to-ethene capability and the consortium amendment outcome are related but distinct observations.
Target Taxon: Dehalococcoides mccartyi strain CWV2
Metabolites: chloroethene (CHEBI:28509 · MediaIngredientMech · CMMMech), ethene (CHEBI:18153 · MediaIngredientMech · CMMMech)
Evidence
-
PMID:41442978 - SUPPORT (IN_VITRO)"a strain capable of completely dechlorinating VC to non-toxic ethene"
-
PMID:41442978 - SUPPORT (IN_VITRO)"50 % reduction of VC accumulation"
Hydrogen- and Electroactive-Guild Dechlorination Stability
Community profiling associated biochar with relative-abundance shifts among putative hydrogen-producing and electroactive guilds. HYPOTHESIZED - those guilds could support dechlorination through reducing-equivalent supply. Relative profiles do not demonstrate hydrogen or electron flux, direct interspecies electron transfer, selective guild necessity or long-term field stability.
Target Taxon: Dehalococcoides mccartyi strain CWV2
Metabolites: hydrogen (CHEBI:18276 · MediaIngredientMech · CMMMech)
Evidence
-
PMID:41442978 - PARTIAL (IN_VITRO)"Microbial community analysis further indicated that biochar promoted syntrophic hydrogen producers and electroactive bacteria, ensuring long-term dechlorination stability."
Knowledge gaps & discussions (1)
KNOWLEDGE_GAP OPEN Which biochar effects and community members causally mediate condition-specific dechlorination?
The published abstract and complete author-uploaded uncorrected-proof body were read, not the complete final published body. Colonization, sorption, bioavailability and putative guild activity were not selectively separated. Faster TCE transformation and lower peak VC are not a demonstrated directed causal sequence and differ by inoculum condition. Proof units and concentrations are inconsistent between methods, results and captions, so none are normalized here. Figure captions and Table 1 text were read, not figure images or supplements. Consortium D345/CWV2 identity, named-member and metadata claims remain open under #1391; no new taxa or compensating arrows are invented.
Attaches to: ecological_interactions#BC600 Biochar-Consortium Coupling, ecological_interactions#BC600 Colonization and Activity Enhancement, ecological_interactions#Biochar-Accelerated TCE Degradation, ecological_interactions#Vinyl Chloride Accumulation Mitigation, ecological_interactions#Hydrogen- and Electroactive-Guild Dechlorination Stability
Growth Media
Cross-Mech Suite Links
Explore related entities across the CultureBotAI X-Mech knowledge bases: