Viessmann biogas purification technology helps to make CNG fuel from sewage
From 2016, one of the world's largest waste water treatment plants near Stockholm will purify biogas to natural gas quality biomethane for CNG-powered vehicles. Viessmann Group company, Schmack Carbotech, has won a contract to provide a gas upgrading plant at one of the world's largest underground waste water treatment plants. Through a process of purification, the facility will produce about 180 million kilowatt hours of natural gas quality biomethane annually from the metropolitan area of Stockholm’s sewage, covering up to 40 per cent of its annual CNG fuel needs. The Henriksdal