Effects of Processing Conditions on Single Screw Extrusion of Feed Ingredients Containing DDGS

Distillers dried grains with solubles (DDGS), a feed coproduct from the fuel ethanol industry, has been shown to be a viable potential alternate protein origin for aquaculture feeds. To research this, three isocaloric (3.5kcal/g) component blends containing 20, 30, and 40% DDGS, with a net protein adjusted to 28% (wet basis, wb), were prepared for use as Nile tilapia feed. Extrusion processing was in that case conducted applying three DDGS contents (20, 30, and 40%, wb), three dampness contents (15, 20, and 25%, wb), three barrel temperature gradients (90-100-100