Table 3 Different chemical pretreatment applied to the biogas production and yield

1

Agave tequilana bagasse

2% (w/w) HCl

Batch at 32 °C, pH 5

0.26 L CH₄/g COD

[177]

2

Pinewood

Organosolv (150 °C, 1 h)

250 mL conical flask at 39 ± 1 °C

38.7 ± 4.1 CH₄ (L/kg CH)

63.3 ± 9.3 CH₄ (L/kg CH)

[178]

3

Sugarcane bagasse

Alkaline autoclaving

Batch at 35 °C for 30 days

222 mL CH₄/g VS

420 mL CH₄/g VS

[179]

4

Wheat straw

Urea (1% w/w)

Batch at 35 °C, 120 rpm

210.4 mL CH₄/g VS

305.5 mL CH₄/g VS

[180]

5

Corn Straw

Hydrochloric acid 2% v/v

1 L Erlenmeyer flask at 37 ± 1 °C

100.6 mL/g VS

216.7 mL/g VS

[176]

6

Corn Straw

Sodium hydroxide 8% v/v

1 L Erlenmeyer flask at 37 ± 1 °C

100.6 mL/g VS

163.5 mL/g VS

[176]

7

Corn Straw

Ammonia 10% v/v

1 L Erlenmeyer flask at 37 ± 1 °C

100.6 mL/g VS

168.3 mL/g VS

[176]

8

Cotton gin waste

Ethanol 0.5 mmol/g VS substrate

250 mL conical flasks at 35 °C

172.5 mL/g VS

241.5 mL/g VS

[181]

9

Sorghum bicolor stalk

H₂SO₄

250 mL batch reactors at 37 °C

55% CH₄

54.5% CH₄

[129]

10

Sorghum bicolor stalk

H₂O₂

250 mL batch reactors at 37 °C

55% CH₄

61.5 CH₄

[129]