Overview
- VS = Total volatile solids, e.g. ca. 9% of total liquid manure mass for cows
Substrate / Gas Yield / Methane Content
Table: Gas yields and methane contents for various substrates at the end of a 10-20 day retention time at a process temperature of roughly 30C.
Substrate
|
Gas yield
(l/kg VS*)
|
Methane content
(%)
|
Pig manure
|
340-550
|
65-70
|
| Cow manure
|
90-310
|
65
|
| Poultry droppings
|
310-620
|
60
|
| Horse manure
|
200-300
|
|
| Sheep manure
|
90-310
|
|
| Barnyard dung
|
175-280
|
|
| Wheat straw
|
200-300
|
50-60
|
| Rye straw
|
200-300
|
59
|
| Barley straw
|
250-300
|
59
|
| Oats straw
|
290-310
|
59
|
| Corn straw
|
380-460
|
59
|
| Rape straw
|
200
|
|
| Rice straw
|
170-280
|
|
| Rice seed coat
|
105
|
|
| Flax
|
360
|
59
|
| Hemp
|
360
|
59
|
| Grass
|
280-550
|
70
|
| Elephant grass
|
430-560
|
60
|
| Cane trash (bagasse)
|
165
|
|
| Broom
|
405
|
|
| Reed
|
170
|
|
| Clover
|
430-490
|
|
| Vegetables residue
|
330-360
|
|
| Potato tops/greens
|
280-490
|
|
| Field/sugar beet greens
|
400-500
|
|
| Sunflower leaves
|
300
|
59
|
| Agricultural waste
|
310-430
|
60-70
|
| Seeds
|
620
|
|
| Peanut shells
|
365
|
|
| Fallen leaves
|
210-290
|
58
|
| Water hyacinth
|
375
|
|
| Algae
|
420-500
|
63
|
| Sewage sludge
|
310-740
|
|
Further Information
References
- Production and Utilization of Biogas in Rural Areas of Industrialized and Developing Countries, Schriftenreihe der gtz, No. 97, pg. 63, after: Felix Maramba, Biogas and Waste Recycling - The Phillipine Experience; Metro Manila, Phillipines, 1978
