三七渣固态发酵生产蛋白饲料的动力学

Study on Kinetics of Solid State Fermentation of Notoginseng Residues for Protein Feed Production

DOI：10.3969/j.issn.1673-1689.2013.11.011

中文关键词: 三七 三七渣 固态发酵 蛋白饲料 动力学

英文关键词: notoginseng notoginseng residues solid state fermentation protein feed kinetics

基金项目:四川省科技支撑计划项目(2008SZ0129)

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中文摘要:

对白腐菌(Phanerochaete Chrysosporium 5.776)/产朊假丝酵母(Candida utilis 2.281)固态发酵三七渣生产蛋白饲料的过程进行了研究,并建立了菌体生长和淀粉降解动力学模型。结果表明,以发酵培养物干基减重率作为表达菌体浓度的间接参数,菌体生长动力学适合采用对数模型进行描述,发酵培养物最大干基减重率Xm=49.68%,比生长速率常数μ=0.042 90 h-1。菌体生长速率在发酵84.8 h后达到最大值。淀粉的降解动力学适合采用指数模型进行描述,发酵过程中淀粉含量降低了26%,降解速率常数为0.015 9 h-1,淀粉的降解速率随着发酵时间的延长而逐渐变小。

英文摘要:

The course of solid state fermentation for protein feed production from notoginseng residues by Phanerochaete Chrysosporium 5.776. and Candida utilis 2.281 was carried out,and microbial growth and starch degradation kinetic models were established. The result shows that with the dry weight reduction ratio of fermenting medium as the indirect parameter for expressing the microbial concentration,Logistic model is suitable for the microbial growth kinetics,and the maximum dry weight reduction ratio Xm=49.68%,specific growth rate constant μ=0.042 90 h-1. The microbial growth rate arrives at the peak point after the fermentation of 84.8 hours. Exponential model is suitable for the starch degradation kinetics,and the content of starch decreases with 26percentages,and the degradation rate constant is 0.015 9 h-1. The degradation rate of starch decreases gradually with the time extension.

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