Ruben Fernandes, CEO of Águas e Energia do Porto (AEdP), guides us through the treatment steps of the Freixo wastewater treatment plant in Porto, Portugal, up to the production of sewage sludge. Sludge from wastewater treatment plants is one of the feedstocks of the SUPREMAS process, which converts it into syngas and biochar. Águas e Energia do Porto hosts one of the two SUPREMAS demonstration sites.
