AIR LIQUIDE
BIOSLING AB
BRIGHT RENEWABLES B.V.
CARBOTECH GAS SYSTEMS GMBH
CIRMAC
CRYOSTAR
DGE GMBH
DMT ENVIRONMENTAL TECHNOLOGY
EISENMANN
ENVITEC BIOGAS AG
ETW ENERGIETECHNIK
FIRMGREEN INC.
FUTURE BIOGAS LTD.
GASREC
GASTECHNIK HIMMEL (GTH)
GASTREATMENT SERVICES BV (GTS)
GM GREEN METHANE S.R.L.
GREENLANE BIOGAS
Guild Associates
HAMWORTHY
HERA CLEANTECH
KIS GROUP
MAHLER
MALMBERG WATER
PENTAIR HAFFMANS
SCHWELM ANLAGENTECHNIK (SAT)
STRABAG UMWELTANLAGEN GMBH
SYSADVANCE
WARTSILA
XEBEC ADSORPTION