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Table 2 Different mechanical pretreatment applied to the biogas production and yield

From: Optimization of biogas yield from lignocellulosic materials with different pretreatment methods: a review

S/N

Biomass

Pretreatment

Anaerobic digestion condition

YBP

YAP

Refs

1

Water hyacinth

0.05 mm

Digester 0.45 L

 

Increase by 16%

[107]

2

Water hyacinth

1.0 mm

Digester 0.45 L

 

Increase by 10%

[107]

3

Meadow grass

200 mm

Bottle 0.5 L

297 mL/g VS

376 mL/g VS

[111]

4

Rice straw

0.3 mm

Glass reactor 2 L

58.1 mL/g VS

62.7 mL/g VS

[109]

5

Wheat straw

0.3 mm

Reactor 2 L

167.8 mL/g VS

245.6 mL/g VS

[108]

6

Wheat straw

1.2 mm

Reactor 2 L

167.8 mL/g VS

264.7 mL/g VS

[108]

7

Barley Straw

5 mm

Glass reactor 2 L

240 mL/g VS

370 mL/g VS

[112]

8

Waste activated sludge

Ultrasonic pretreatment

Semi-continuous reactors (15 days)

 

49% increase

[113]

9

Wheat straw

High hydrostatic pressure

 

31.8 mL

77.9 mL

[110]

10

Hyacinthus spp.

Microwave

 

137.18 mL/g-sub

221 mL/g-sub

[114]

11

Groundnut shell

2 mm

Batch

 

147.6 lN/kgFM

[28]

12

Groundnut shell

4 mm

Batch

 

180.7 lN/kgFM

[28]

13

Groundnut shell

6 mm

Batch

 

177.3 lN/kgFM

[28]

  1. YBP = Yield before pretreatment and YAP = Yield after pretreatment