Feeding value improvement by co-fermentation of corn-ethanol co-product and agro-industrial residues with Rhizopus oryzae

Corn dried distiller’s grain with solubles (cDDGS) is a feeding ingredient for monogastric animals but limited inclusion rate due to its imbalanced amino acids, high fiber content, and anti-nutritional compounds. Moreover, production of cDDGS costly energy intensive. This study investigated fungal fermentation corn stillage mixing other dry agro-industrial residues which could by-pass the energy-intensive drying process while improving nutritional value mixed substrates. Rhizopus oryzae was used ferment WDGS blended canola meal (CM), cottonseed (CSM), sugar beet pulp (SP) soybean hull (SH) at different ratio 28 ? 12 days. Results suggested that short incubation period (4 days) favorable improvement protein key acids profile. Substrate mixture C/N above 3 effectively reduced ammonia generation. Significant reduction (p < 0.05) structural carbohydrates (mainly glucan degradation by 20–30 %) occurred after fermenting CM SP. all SP or SH, lower (less than 50 CSM showed phytate 30–75 %. proved feasibility solid-state in agro-residues animals.