Correct option is C
Sustainable Aviation Fuel (SAF) is a type of renewable fuel that is used to power aircraft, reducing the carbon footprint of aviation. It can be produced from a variety of feedstocks, including waste materials, residues, and other renewable resources.
1. Agricultural residues such as straw, husks, and other crop by-products can be converted into biofuels, including Sustainable Aviation Fuel. These residues are a valuable feedstock because they are abundant and do not compete directly with food crops.
2. Corn grain can be used to produce ethanol, which can be further processed into Sustainable Aviation Fuel. However, using corn grain raises concerns about food versus fuel, but it is still a viable feedstock for SAF production.
3. Wastewater treatment sludge can be used to produce biogas, which can then be converted into various biofuels, including SAF. This feedstock is advantageous as it helps in waste management and resource recovery.
4. Wood mill waste, such as sawdust, wood chips, and other by-products of the timber industry, can be converted into biofuels. These lignocellulosic materials are considered an excellent feedstock for producing Sustainable Aviation Fuel.
