From 2016 landfilling biological waste has been prohibited. This has increased utilization levels significantly. Now, biowaste is used to produce compost and biogas.
Biowaste category includes the following waste types: organic communal waste, sludge from wastewater and dung. In 2016 Finland had 194 working composting plants. Anaerobic composting is also gaining popularity as methane is used as energy.
Composting plants are owned by municipalities, governmental companies or private companies.
Biogas production happens in four sectors: wastewater treatment plants, farms, composting plant and landfills:
In the end of 2017 Finland had 16 wastewater treatment plants which used biogas reactors. Sludge from industrial wastewater was treated in four plants by anaerobic method. 15 farms produced biogas locally and biological communal waste was treated in 18 biogas plants. In addition, biogas is collected from 38 landfills making the total biogas production 72,3 million cubic meters per year.
172,2 million cubic meters of biogas in 2017
+10% icrease in biogas production
Industrial complexes of wastewater treatment producing biowaste
Combined digestion plants, their type and year of opening
In a combined digestion plant, several different biowaste types are processed together
There is a new patented dry digestion plant being built in Jepua Biogas using Hardferm technology by company Doranova. The plant will be able to produce biogas from less clean waste fractions and process up to 25 000 tons (wet mass) difficult waste per year.
520,2 GWh of heat and 178,4 GWh of electricity was produced from biogas in 2017. In the same year, 30,2 ± 0,8 GWh of biogas was used as a fuel for transport. That is 41% more than in the previous year 2016. The biggest reason is the increase of biogas use in buses and waste transport machines.
Source: Finnish national biogas statistics. Data year 2017.