Organic Waste Recycling

Biofuels production 193

Fermentation time (days) - - - - 10 10 30 10-15 9 10-15 10

CH

content in 4

gas (%) - - - - 58 57 60 58 69 58-60 61

(°

C)

• 
  
  
  
  • 11.1-31.1 15.5-17.3 34.6 34.6 37.3 32.6 50.6 32.6 34.6
  
  
  
  

Temperature (°

F)

• 
  
  
  
  • 52-88 60-63 95 95 99 90.5 123 90.5 91
  
  
  
  

m

3 /kg

0.33 0.31 0.23-0.50 0.20-0.29 0.86

b

1.11 0.31

c

0.46-0.54

f

0.56

c

0.69-0.76 0.49

Biogas production per unit weight of dry solids^3 ft

/lb

5.3 5 3.6-8.0 3.1-4.7 13.7

b

17.7 5.0

c

7.3-8.6

f

8.9

c

11.1-12.2 7.9

Raw materials Cow dung Cattle manure Cattle manure (India) Cattle manure (Germany) Beef manure Beef manure Chicken manure Poultry manure Poultry manure Pig manure

d,e

Pig manure

d,e

Table 4.21 Yield of biogas from various waste materials

a