TABLE 1

Reactions and roles of each member in the sustainable dechlorinating consortium Dhc195/DvH/PfR7(+DMB)

StrainReaction no.Stoichiometric equationbInteracting strainsRole
DvH1aCH3CHOHCOO (lactate) + H2O → CH3COO (acetate) + HCOO (formate) + H+ + H2 ΔG = −5.3 kJ/rxnDhc195, PfR7Supply Dhc195 with H2 and acetate
2aHCOO (formate) + H2O → H2 + HCO3 ΔG°′ = 1.4 kJ/rxnCompete with PfR7 for lactate
PfR73a3CH3CHOHCOO (lactate) → CH3COO (acetate) + 2CH3CH2COO (propionate) + H+ + HCO3 ΔG°′ = −164.8 kJ/rxnDhc195, DvHSupply Dhc195 with corrinoids and acetate; compete with DvH for lactate
Dhc1954cC2HCl3 (TCE) + 2H2 → C2H3Cl (VC) + 2H+ + 2Cl ΔG°′ = −149.7 kJ/rxnDvH, PfR7Lower H2 partial pressure for DvH
5cC2HCl3 (TCE) + 3H2 → C2H4 (ethene) + 3H+ + 3Cl ΔG°′ = −219.9 kJ/rxnLower chloroethene toxicity for DvH and PfR7
  • a See reference 51.

  • b rxn, reaction.

  • c See reference 14.