The European Biogas Association has published a report on annual biogas and biomethane capacities in 2013, outlining future policies and opportunities around Europe.
While countries such as Hungary, the Czech Republic, Slovakia and Poland have increased the number of biogas plants by up to 18%, other countries have introduced caps on funding and support.
As a result, if found the largest European biogas markets - including Germany and Italy - are now stagnating.
This is contributing to a general trend for more stagnation in the future, with support for biogas plants cancelled in the Czech Republic and Cyprus.
However, steady growth has been reported for countries including the UK, France and Sweden.
Currently, electrical and thermal energy produced from biogas in Europe amounts to the annual consumption for households in Belgium and Slovenia combined.
This total equates to the output of 15 coal-powered plants, the study reports, highlighting the environmental benefits available for more biogas development in the future.