Table 1 Pretreatment conditions at three kinds of factors for PH

Time

30, 60, 90, 120 min

10% (w/v) solid loading, ratio of H₃PO₄ to H₂O₂ (1:9), at 100 °C

Ratio of H₃PO₄ to H₂O₂ (v/v)

1:9, 2:8, 3:7, 4:6, 5:5

10% (w/v) solid loading, at 100 °C for 60 min

Temperature

50, 60, 70, 80, 90, 100, 110 °C

10% (w/v) solid loading, ratio of H₃PO₄ to H₂O₂ (2:8) for 60 min