Table 4.
Ethanol yields (mg/g TSinitial) of all schemes applied in this study for GL pretreated with H2SO4 and H3PO4 10 g/100 g TS and 2 g HCl/100 g TS. SSF: simultaneous saccharification and fermentation, SHF: separate hydrolysis and fermentation.
| Whole Biomass Slurry | Separated Fractions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| P. stipitis | P. tannophilus | S. cerevisiae | P. stipitis (Liquid) | P. tannophilus (Liquid) | ||||||
| SSF | SHF | SSF | SHF | SSF | SHF | Solid SSF a | Solid SHF a | Solid SSF a | Solid SHF a | |
| H2SO4 | 88.3 ± 0.5 | 90.3 ± 1.2 | 88.2 ± 0.4 | 80.3 ± 0.4 | 90.5 ± 4.2 | 83.5 ± 4.1 | 108.8 ± 8.6 | 92.6 ± 4.3 | 104.3 ± 9.6 | 88.8 ± 7.2 |
| H3PO4 | 72.6 ± 1.6 | 73.1 ± 3.3 | 82.1 ± 3.9 | 75.2 ± 2.2 | 71.5 ± 2.5 | 69.5 ± 2.5 | 61.3 ± 4.2 | 67.3 ± 3.9 | 60.5 ± 2.5 | 66.5 ± 2.8 |
| HCl | 63.0 ± 0.2 | 61.3 ± 1.2 | 65.3 ± 1.1 | 73.3 ± 2.4 | 72.3 ± 4.6 | 69.3 ± 2.3 | 62.8 ± 3.9 | 68.4 ± 5.9 | 61.5 ± 3.7 | 67.0 ± 5.4 |
a The solid fraction was fermented by S. cerevisiae either at SSF or at SHF mode.