In April 11, 2014, Nanjing Carbon Recycle Biomass Energy Co. Ltd. and China Water Industry Group Limited(CWI) signed a biogas upgrading contract.,Nanjing Carbon Recycle Biomass Energy Co.,Ltd is the technology and devices supplier for CWI’s Bio-CNG projects. Both sides intent to make cooperation in many fields as bio-gas research，process design , market development  etc…, to promote the bio-gas (Bio-CNG) application in the field of renewable resources.