Table 2.
Chemical components of untreated wood chips, solid substrates, and pretreatment hydrolysate
| Untreated wood chips | Solid substrates | Pretreatment hydrolysate (mg/mL) | |||
|---|---|---|---|---|---|
|
Poplar (100 g) |
Lodgepole pine (100 g) |
SP-Po-A
1
B
4
(73.5 g) |
SP-Lp-A
1
B
8
(58.6 g) |
SP-Po-A
1
B
4
(300 mL) |
SP-Lp-A
1
B
8
(300 mL) |
 |
 |
 |
 |
 |
 |
| Klason lignin 23.5% |
Klason lignin 28.6% |
Klason lignin 26.2% |
Klason lignin 34.7% |
LS as Klason lignin 12.5 |
LS as Klason lignin 27.5 |
| Glucan 40.7% |
Glucan 41.9% |
Glucan 48.4% |
Glucan 57.4% |
Mono- and oligosaccharides |
Mono- and oligosaccharides |
| Xylan 16.4% |
Xylan 5.5% |
Xylan 4.38% |
Xylan 1.5% |
Glucose 3.97 |
Glucose 9.83 |
| Mannan 3.8% |
Mannan 11.7% |
Mannan 1.48% |
Mannan 0.6% |
Xylose 41.00 |
Xylose 8.07 |
| Sulfonic acid groups |
Sulfonic acid groups |
Mannose 4.39 |
Mannose 21.88 |
||
|
Inhibitors |
Inhibitors |
||||
| 4.22 mg/g substrate |
10.85 mg/g substrate |
||||
| Zeta potential at pH 4.8 |
Zeta potential at pH 4.8 |
Formic acid 24.58 |
Formic acid 17.05 |
||
| Acetic acid 10.65 |
Acetic acid 18.66 |
||||
| −18.5 mv | −21.3 mv | Furfural 1.97 |
Furfural 4.17 |
||
| HMF 0.19 | HMF 5.00 | ||||
HMF, hydroxymethylfurfural; LS, lignosulfonate.