Table 3.
Different fermentation processes containing high-grade sugars, inoculated with B. coagulans
| Strain | Carbon source | Cs (g/l) | N-source (g/l) | C LA (g/l) | A LA (g) | Q v,,av (g/l/h) | Q v,max (g/l/h) | Ys/LA(%) | Time (h)a | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| B. coagulans DSM2314 | High-grade glucose + xylose | 72 +24 | 10 YE, 20 PE | 59.3 | 83 | 2.50 | 5.1 | 92 | 29 | Van der Pol [15] |
| B. coagulans DSM2314 | High-grade glucose + xylose | 72 +24 | 10 YE, 2NH4PO4, 3NH4SO4 | 55.6 | 78.6 | 2.40 | 3.9 | 86 | 28 | Van der Pol [15] |
| B. coagulans SIM-7 | High-grade glucose | 126 | 25 YE | 89.3 | – | 2.8 | 5.8 | 90 | 31 | Michelson [24] |
Different nitrogen sources were used: YE yeast extract, PE peptone
C LA concentration of lactic acid at the end of the SSF in g/l
A LA total lactic acid produced in g
Q v,av average volumetric lactic acid productivity in g/l/h
Q v,max maximum volumetric lactic acid productivity in g/l/h
Y s/La estimated conversion efficiency of sugar monomers to lactic acid in W/W
Y Lc/La lactic acid production yield on total lignocellulosic sugars in W/W
aTotal fermentation time, from inoculation of SSF to reaching final lactic acid concentration