黄姜纤维素渣固态发酵生产蛋白饲料

Production of protein feedstuff from residue of yam diosgenin by solid-state fermentation

利用酵母菌和黑曲霉对黄姜纤维素渣进行固态发酵生产蛋白饲料。研究了接种量、温度、固液比、发酵时间和通风量对发酵的影响。同时在单菌种发酵的基础上,对酵母菌和黑曲霉的混合发酵进行了初步探索,研究结果表明,混菌发酵的实验效果比单菌发酵的效果好。当条件为:黄姜纤维素渣25 g,加入脲0.53 g,KH2PO40.05 g,K2HPO40.05 g,Mg-SO40.05 g,NaCl 0.05 g,CaCl20.01 g,接种量为14%,温度30℃,固液比2∶1,发酵产物的蛋白质量分数可达到13.98%。

The Cadida atilis and Aspergillus niger were used on the solid-state fermentation of the residue of yam diosgenin to produce protein feedstuff.The effect of inoculation quantity,temperature,solid-liquid ratio,time and ventilation on the fermentation was investigated.Basing on single strain fermentation,co-fermentation by Cadida atilis and Aspergillus niger were also examined.The results showed that the efficiency of co-fermentation was higher than that of single strain.The protein content of fermented product increased to 13.98% ultimately under the following conditions： residual yam diosgenin of 25 g,urea of 0.53 g,KH2PO4 of 0.05 g,K2HPO4 of 0.05 g,MgSO4 of 0.05 g,NaCl of 0.05 g,CaCl2 of 0.01 g,inoculation quantity of 14%,the solid-liquid ratio of 2∶1,temperature of 30℃.