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

Abstract:

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.