Canadian Biogas Association
https://biogasassociation.ca 

Denmark
Danish Biogas Branch

Finland
Finland AD Plant List:
www.biokaasuyhdistys.net

France
French Biogas Association (Club Biogaz):
http://atee.fr/biogaz/ 

Germany
Fachverband Biogas
www.biogas.org

Ireland
CRE- Composting and AD Association of Ireland
http://www.cre.ie/web/

Netherlands

Sweden
Energiforsk: www.energiforsk.se
Old site: www.sgc.se 

Switzerland
Biomasse Schweiz:
www.biomasseschweiz.ch
Ökostrom Schweiz
www.oekostromschweiz.ch 

United Kingdom
Anaerobic Digestion and Biogas Association:
www.adbiogas.co.uk
National Non-Food Crops Centre:
www.nnfcc.co.uk
Renewable Energy Association:
www.r-e-a.net