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