Biogas CO2-focused cleantech startup CryoCollect announced today that it has raised €4 million (USD$4.3 million), including investments from Engie New Ventures, the corporate venture fund of power company Engie, and GTT Strategic Ventures. Founded in 2017, Paris-based CryoCollect develops technologies for gas treatment, purification & liquefaction, for gases such as biomethane, carbon dioxide or hydrogen. The company has focused on…