Improvement of Physiological Active Substance of Wheat Dried Distillers' Grains with Solubles Fermented by Preussia aemulans under Optimum Fermentation Conditions

In this study, a new fungus named Preussia aemulans was isolate from Cordyceps sinensis fruiting body. The agricultural waste of wheat dried distillers' grains with solubles (DDGS) was utilized as a culture medium for Preussia aemulans. By using orthogonal experiment, the fermentation conditions of polysaccharide, polyphenol and adenosine were optimized. Under the optimum fermentation conditions of polysaccharide, polyphenol and adenosine, the content of polysaccharide, polyphenol, adenosine and protein were 32.68 ± 3.24 mg/g dry matter, 7.91 ± 0.2 mg/g dry matter, 1.36 ± 0.24 umol/g dry matter and 104.41 ± 6.65 mg/g dry matter, respectively. Based on the nutritional profile, the fermented wheat DDGS could be utilized as functional material of feed or food.