TABLE 2.

Reactor concentrations after incubation of axenic bacterial strains for 7 daysa

OrganismIncubation modeFinal CO2, a concn (%)Final concn of volatile fatty acids (mg liter−1)Final no. of CFU ml−1
Pseudomonas aeruginosaBiofuel cell14.7 ± 7.61,496 ± 3713.11 × 106 ± 0.19 × 106
Serum flask3.5 ± 3.7145b3.35 × 105b
Alcaligenes faecalisBiofuel cell13.3 ± 4.71,480 ± 3972.79 × 106 ± 0.20 × 106
Serum flask8.3 ± 3.184b7.63 × 105b
Enterococcus gallinarumBiofuel cell18.6 ± 5.1856 ± 2974.03 × 107 ± 1.09 × 107
Serum flask2.6 ± 0.725b9.04 × 106b
  • a Gas concentrations are expressed as percentages of the headspace.

  • b Data from a single reactor.