不同菌种以三七渣为基质的发酵过程

Study on Fermentation Process of Different Strains Cultured in the Substrate of Notoginseng Residues

投稿时间：2012-11-29

DOI：

中文关键词: 三七 三七渣 发酵 饲料

英文关键词: notoginseng residues fermentation feed

基金项目:四川省科技支撑计划项目(2008SZ0129)

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中文摘要:

为了选择合适的菌种用于三七渣固态发酵生产蛋白饲料,分别进行了黑曲霉、康宁木霉、米曲霉、绿色木霉、白腐菌共5种多糖分解菌和产朊假丝酵母、热带假丝酵母、酿酒酵母共3种酵母菌以三七渣为基质的发酵过程研究。研究结果表明,多糖分解菌对三七渣的代谢能力明显强于酵母菌,在发酵过程中多糖分解菌发酵培养物的还原糖质量浓度、pH值、干重变化幅度均大于酵母菌。在所有受试菌种中黑曲霉对三七渣的代谢能力最强,其发酵培养物中还原糖质量浓度峰值可达250 mg/g,经过5 d发酵后黑曲霉发酵培养物的干基减重率达42.6%,真蛋白质量分数达到23.92%。

英文摘要:

Five species of polysaccharide decomposition fungi(Aspergillus niger,Aspergillus oryzae,Phanerochaete chrysosporium,Trichoderma viride and Trichoderma koningii) and three species of yeasts(Candida utilis,Candida tropicalis and Saccharomyces cerevisiae) were cultured respectively in the substrate of notoginseng residues,to select the suitable strains for the production of protein feed.The result indicated that the metabolization capability on notoginseng residues by polysaccharide decomposition fungi was stronger than that by yeasts.During the whole fermentation period,the amplitude of variation of reducing sugar content,pH value and dry weight in the fermentation culture by polysaccharide decomposition fungi is larger than that by yeasts.The metabolization capability of Aspergillus niger on notoginseng residues was the strongest in all tested fungi,and the maximum of reducing sugar content in the fermentation culture can reached at 250 mg/g,and the loss ratio of dry weight can reached at 42.6% and the true protein content in the fermentation culture can reached at 23.92% after five-days′ fermentation.

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