2G Energy AG (Germany)

Air Liquide (France)

Bosch KWK Systeme GmbH (Germany)

DGE GmbH (Germany)

DMT Environmental Technology BV (The Netherlands)

DVO, Inc. (USA)

EnviTec Biogas AG (Germany)

Gasum Oy (Finland)

Greenlane Biogas (UK)

Guild Associates, Inc. (USA)

RCM Digesters, Inc. (USA)

Scandinavian Biogas Fuels International AB (Sweden)

Schmack Biogas GmbH (Germany)

UTS Biogastechnik GmbH (Germany)

Xebec Adsorption USA, Inc. (USA)