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Related Experiment Videos

Pilot-scale semisolid fermentation of straw.

G A Grant, Y W Han, A W Anderson

    Applied and Environmental Microbiology
    |March 1, 1978
    PubMed
    Summary

    Semisolid fermentation of ryegrass straw significantly enhanced its nutritional value for animal feed. This process, using Candida utilis, increased protein, fat, and digestibility, offering a valuable method for feed improvement.

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    Area of Science:

    • Agricultural Science
    • Biotechnology
    • Animal Nutrition

    Background:

    • Ryegrass straw has low nutritional value for animal feed.
    • Improving feed value requires efficient and scalable processing methods.

    Purpose of the Study:

    • To evaluate the efficacy of semisolid fermentation for enhancing ryegrass straw's animal feed value.
    • To establish a pilot-scale process for semisolid fermentation of ryegrass straw.

    Main Methods:

    • Pilot-scale semisolid fermentation of ryegrass straw using Candida utilis.
    • Straw hydrolysis with sulfuric acid, ammonia treatment for pH adjustment, and fermentation at 70% moisture.
    • Stationary straw with upward air flow during fermentation (12-29 h) at 20-40°C.

    Main Results:

    • Successful pilot-scale fermentation (100 kg/batch) in a single vessel.
    • Abundant microbial growth observed even at low oxygen tensions.
    • Significant increases in protein content, crude fat, and in vitro rumen digestibility.

    Conclusions:

    • Semisolid fermentation is an effective method to improve ryegrass straw's nutritional profile.
    • The developed pilot-scale process is efficient and requires no agitation.
    • This technique offers a viable strategy for upgrading agricultural byproducts into valuable animal feed components.

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