Products from biogas fermentation
- Biogas, methane content 45-65 %
- Biogas can be turned into electricity and heat
- Biogas can be washed and pressurized traffic-fuel
- Separated fertilizer liquid
- Nutrient rich and prepared nitrogen in bio fertilizer
- Biowaste and dung to be used in raw materials (not waste)
- Elimination of the smell
- Hygienized bio-fertilizer
Typical biogas content
- Methane CH4 45-75 %
- Carbon dioxide CO2 25-45 %
- Carbon oxide CO 0-0,3 %
- Nitrogen N2 1-5 %
- Hydrogen H2 0-3 %
- Hydrogen sulfide H2S 0,1-0,5 %
Typical methane output from different biomasses
| Biomaterial | Biogas production | Methane content |
|---|---|---|
| m3/tons of wet weight | % of gas | |
| Slaughter waste | 250 | 70 |
| Biowaste | 150-250 | 65 |
| Field biomass | 50-250 | 55 |
| Pig dung | 25-35 | 65 |
| Cow dung | 15-25 | 60 |
Average energy content of biogas (rule of thumb):
- 1 m3 of methane (100%) = 1 liter of oil = 10 kWh energy
- Methane content of biogas assumed to be about 60 %
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1 m3 of biogas (methane content about 60%)
= about 6 kWh energy
= about 2 kWh electricity and about 3,5 kWh heat