Table 3 Inhibition effects of different WSL on enzymatic hydrolysis
Lignin type | Enzyme | Substrate | Enzymatic hydrolysis | Hydrolysis yield | Refs. |
|---|---|---|---|---|---|
Commercial sodium LS from poplar | Cellic CTec 2 | Whatman filter paper | 2% (w/v), pH = 4.8, 50 °C, 200 rpm and 72 h | Improved by 30.0% to 46.0% with low Mw fraction | [129] |
LS from hydrolysate of sulfite pretreated lodgepople pine | Celluclast and Novozyme 188 | Lodgepople pine | 2% (w/v), pH = 5.5, 50 °C, 200 rpm and 72 h | Improved from 51.0 to 90.0% | [119] |
Reax 85A | Cellic CTec 2 | Acid bisulfite pretreated poplar | 2% (w/v), pH = 5.4, 50 °C, 180 rpm and 48 h | Improved from 76.4 to 83.5% | [120] |
Commercial sodium LS | Cellic CTec 2 | Kraft pulping produced lodgepole pine | 2% (w/v), pH = 4.8, 50 °C, 200 rpm and 72 h | Improved from 33.0 to 55.0% | [121] |
LS from sulfite pretreated poplar | Cellulase mixture | Sulfite pretreated poplar | 2% (w/v), pH = 4.8 or 5.2, 50 °C, 200 rpm and 96 h | Improved by 5% to 9%, respectively, at pH 4.8 and pH 5.2 | [130] |
LS from poplar sulfite pulping | Cellic CTec 2 | A mixture of the cellulose | 2% (w/v), pH = 4.8, 50 °C, 200 rpm and 72 h | Improved from 52.0 to 67.0% | [123] |
Water-soluble alkaline lignin | Cellic CTec 2 | Sodium hydroxide pretreated wheat straw | 2% (w/v), pH = 4.8, 50 °C, 180 rpm and 72 h | Improved from 66.8 to 76.9% | [122] |
Reax 85A (sulfomethylated softwood kraft lignin) | Cellic CTec 2 | GLMP | 5% (w/v), pH = 4.8, 50 °C, 180 rpm and 96 h | Improved from 42.0 to 75.0% | [16] |