Finnish Environment Institute | Suomen ympäristökeskus | Finlands miljöcentral

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Utilisation of biogas

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Cattle manure is suitable raw material for recycled
fertilizers. Photo: Tapio Heikkilä

Biogas production is based on multiphase composition process generated by microbes. Several organic raw materials are possible such as manure, bio-waste, wastewater sludge, slaughterhouse waste and .plant biomass.

The end-products are biogas and nutrient-rich digestate. Majority of biogas (50-70%) is methane. Methane produced in biogas plant is a renewable energy source. Energy can be used for electricity, heat and fuel.

It is possible to produce biogas from waste streams more than 300 GWh in Helsinki metropolitan area. This is equivalent to an annual consumption of 25 000 passenger cars.

One Finnish silage bale (650 kg) can produce 80 m3 of biomethane (0.8 MWh). For one natural gas vehicle, this is sufficient for 1300 kilometers.

In centralized biogas plants, there are multiphase processing chains, which include the biogas reactor and e.g. pre-processing, hygienisation and post-processing of digestate.
Published 2018-07-06 at 9:44, updated 2018-07-06 at 9:44
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