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Related Experiment Videos

Production of cellulase by Trichoderma.

D Sternberg

    Biotechnology and Bioengineering Symposium
    |January 1, 1976
    PubMed
    Summary

    Large-scale production of cellulase enzymes from Trichoderma viride requires culturing on cellulose media. Optimizing conditions to avoid excess carbohydrate consumption is key for high yields of these valuable enzymes.

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    Area of Science:

    • Biotechnology
    • Enzyme Engineering
    • Microbial Fermentation

    Background:

    • The cellulase complex in Trichoderma viride is inducible and essential for cellulose degradation.
    • Efficient production of cellulase is crucial for various industrial applications, including biofuel production and biomass conversion.
    • Understanding the regulation of cellulase synthesis (inducible and repressible) is key to optimizing yields.

    Purpose of the Study:

    • To optimize conditions for large-scale cellulase enzyme production from T. viride.
    • To investigate methods for maximizing extracellular enzyme yields in submerged fermentation.
    • To evaluate the efficacy of enzyme preparations in saccharification of ball-milled cellulose.

    Main Methods:

    • Culturing T. viride mutant QM9414 on cellulose-containing media for enzyme induction.
    • Utilizing submerged fermentation techniques for enzyme production.
    • Assessing enzyme activity by measuring filter paper (FP) units and protein concentration.
    • Testing the saccharification potential of enzyme preparations on ball-milled cellulose.

    Main Results:

    • Extracellular enzyme preparations with 1.6 FP units/ml and 1.6 mg protein/ml were achieved within 4-5 days.
    • Optimized conditions involved culturing on cellulose and avoiding excess carbohydrate consumption.
    • The enzyme preparations effectively produced a 5% sugar solution from 10% ball-milled cellulose within 24 hours at 50°C.

    Conclusions:

    • Submerged fermentation of T. viride mutant QM9414 on cellulose is an effective method for producing high yields of cellulase enzymes.
    • Careful control of cultural conditions, particularly carbohydrate availability, is critical for maximizing enzyme production.
    • Further enhancements in cellulase yields are anticipated through continued mutagenesis and nutrient level adjustments.

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