Consider the following materials:1.Agricultural residues2.Corn grain3.Wastewater treatment sludge4.Wood mill wasteWhich of the above can be used as feedstock for producing Sustainable Aviation Fuel?

1. A

   1 and 2 only

   1 and 2 only. Sludge and wood waste are also SAF feedstocks.

2. B

   3 and 4 only

   3 and 4 only. Agri residues and corn grain are also used.

3. C

   1, 2, 3 and 4

   All four. HEFA / alcohol-to-jet / gasification routes take biomass, oils, residues and wastes.

4. D

   1, 3 and 4 only

   1, 3 and 4 only. Corn grain (ethanol path) is also a listed SAF feedstock.

Summary. Official key is (c) all four. Sustainable Aviation Fuel can be made from agricultural residues, corn (alcohol-to-jet), wastewater sludges and wood-mill waste, among other certified feedstocks. None of the four is excluded on this paper.