Table 5 Different thermal pretreatment applied to the biogas production and yield
S/N | Biomass | Pretreatment | Anaerobic digestion condition | YBP | YAP | Refs |
|---|---|---|---|---|---|---|
1 | Corn stover | Steam explosion | Batch, 37 °C for 28 days | 155.4 mL CH4/g VS | 217.5 mL CH4/g VS | [231] |
2 | Rice straw | Hydrothermal 100 °C; 10 min | Glass Bottle 1 L | 92 mL/g VS | 280 mL/g VS | [228] |
3 | Reed biomass | Steam explosion 160 °C; 5 min | Digester 0.25 L | 188 mL/g VS | 226 mL/g VS | [230] |
4 | Reed biomass | Steam explosion 200 °C; 15 min | Digester 0.25 L | 188 mL/g VS | 355 mL/g VS | [230] |
5 | Safflower straw | Hydrothermal 120 °C; 60 min | Glass bottle 0.118 L | 96.5 mL/g VS | 191.4 mL/g VS | [227] |
6 | Cocoa pods residues | Hydrothermal 150 °C | Bottle 0.5 L | 196.3 mL/g VS | 289.3 mL/g VS | [229] |
7 | Wheat straw | Conventional heating (121 °C for 60 min) | Batch mesophilic |  | 29% increase | [179] |
8 | Wheat straw | Conventional heating (120 °C for 30 min) | Batch mesophilic |  | 64.3% increase | [112] |
9 | Maize stalks | Conventional heating (120 °C for 30 min) | Batch mesophilic |  | No change | [112] |
10 | Giant reed | Liquid hot water (190 °C for 15 min) | Batch mesophilic |  | + 31% vs. 0 mL CH4/g control | [232] |