Italian abbr: "Cdr". Refuse-derived fuel (RDF), following UNI 9903-1 technical laws Fuel Many fuels can be derived from waste, refuse can be combusted directly in an incinerator to provide power, methane produced at landfill can be collected and combusted, even chicken litter can be dried and combusted. However since this report is looking into biofuels for transport this section will concentrate only on liquid and gas fuels produced from waste that are suitable for combustion in a vehicle engine