Objectives: To take full advantage of the Chinese medicinal herb residues, the conditions on fermentation of single cell protein feed were studied.
Methods: First,the type of Chinese medicinal herb residues and the microbial strain were screened. Then, the single factor and orthogonal experiments were used to investigate the amount of residue, water and urea.
Results: The results showed that the protein content was 20. 98% which was highest when Erlong Zuoci pills residue and Aspergillus niger were applied. When the amount of residue was 20 g, urea was 0. 35%,water was 200%,the content of protein increased from 9. 79% to 21. 35%,and the rate of increasing of protein reached to 118. 1%. The effect order of various factors on the protein content was the amount of urea > the amount of water > the amount of residue.
Conclusion: Using the microbial fermentation can improve the single cell protein content in the Chinese medicinal herb residues, the results can provide a scientific basis for development and application of the downstream products of Chinese herbal medicine.