Distillers dried grains with solubles (DDGS) is a co-product of the ethanol industry.
Composition and digestibility of nutrients can be influenced by the composition of the starting
grains. In the United States, maize is the primary grain used to produce ethanol; however, in
Europe and Canada, wheat is primarily used. Ethanol can also be produced from mixtures of
grains, such as maize and wheat. Variability in nutrient composition and digestibility in DDGS
can also be impacted by processing technologies that may or may not be implemented in the
ethanol plant. Centrifugation of solubles is one such technology that may be implemented in
ethanol plants to extract oil from solubles to be sold to the biodiesel industry. Two experiments
are described in this thesis. The objective of the first experiment was to compare the standardized
ileal digestibility (SID) of AA by growing pigs in European DDGS produced from wheat, maize,
or wheat-maize mixtures