TABLE 2

Kinetic and yield parameters obtained from batch culture experiments of A. vinelandii strains CA and CA6 growing in nitrogen-free Burk mediumb

Strainμa (h−1)Biomass yield (YX/S)Hydrogen and CO2 yields
End of growth phase, 20 g/liter sucrose (limiting growth substrate)Stationary phase pulse, 5 g/liter sucrose (limiting growth substrate)
mg X/g SC-mol X/mol Sg CO2/g Smol CO2/mol Smol CO2/mmol H2mmol H2/mol Sg CO2/g Smol CO2/mol Smol CO2/mmol H2mmol H2/mol S
CA0.2941.460.550.6875.34>53<0.10.483.8>38<0.1
CA60.1524.50.3240.664.950.1337.210.4543.530.526.7
  • a Maximum specific growth rate.

  • b Conditions are 1-lpm airflow, 30°C, 30% dissolved oxygen. X, dry-weight biomass; S, sucrose.