微生物固态发酵和酶解工艺处理棉粕的研究
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摘要
本试验研究了微生物和蛋白酶共同作用下棉粕中毒性因子和营养成分的变化。在枯草芽孢杆菌、酿酒酵母和中性蛋白酶等参与的固态发酵体系中,检测棉粕中游离棉酚、粗蛋白、酸溶性蛋白、粗纤维、氨基酸组成、益生菌含量等指标。结果发现,60h的固态发酵与酶解后,相比原始棉粕,发酵棉粕中游离棉酚含量降低40%以上,酸溶蛋白提高了108.7%,粗纤维降低约12.7%,枯草芽孢杆菌和酵母含量分别大于1.0×10~8 CFU/g和1.0×10~7 CFU/g。由此可见,经过发酵和酶解后棉籽蛋白的营养价值和饲料品质有所提高。
This experiment was conducted to studythe toxicity and nutritional components' changes in cottonseed meal by the solid-state fermentation and enzymatic hydrolysis.In the reaction system,Bacillus subtilis,Saccharomyces cerevisiae and neutral proteinase are the main participants.Some index,such as free gossypol,crude protein,acid soluble protein,crude fiber,amino acid composition and probiotics,are detected.The results showed that:Compared to the original cottonseed meal,the free gossypol decreased by more than 40%,the acid soluble protein increased by 108.7%,crude fiber decreased by 12.7%,the Bacillus subtilis and yeast content were more than l.0×10~8 CFU/g and l.0×10~7 CFU/g respectively,after 60 h fermentation.Therefore,the nutritional value of cottonseed protein was increased by fermentation and enzymatic hydrolysis.
引文
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