Table 4.

End products of lactate or ethanol metabolism byDesulfovibrio sp. strain DR1 and Sporomusa sp. strain DR1/8 with the addition of sulfate, co-inoculation of M. hungatei JF1, or without additiona

StrainOrganic substrate (and electron acceptor)Amt of organic substrate used (μmol)Amt of product (μmol)
AcetateHydrogenSulfideMethane
DR1Lactate (+ sulfate)500488b 260
Ethanol (+ sulfate)500454250
DR1Lactate4844110
Ethanol6872120
DR1 + JF1Lactate500426226
Ethanol500451245
DR1/8Lactate500664
Ethanol500682
DR1/8 + JF1Lactate500594169
Ethanol500453214
  • a Experiments were carried out in 50-ml aliquots of FM medium in 120-ml serum bottles incubated at 25°C. Na2SO4 was added as noted at 1,000 μmol per 50 ml. Biomass formation was not measured.

  • b −, not determined.