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Preservation of Fruits and Vegetables by Fermentation

  • Microorganisms and enzymes are used for the decomposition of carbohydrates and the process is termed as “Fermentation”

    a) Alcoholic Fermentation:

    The keeping quality of alcoholic beverage directly depends upon the alcohol present. Yeasts play an important role in this type of fermentation.

    C6H12O6 + Yeast ——-à 2C2H5OH + CO2
      (Dextrose)                                        (Alcohol)

    b) Acetic Fermentation:

    This type of fermentation follows alcoholic fermentation and is completed by vinegar bacteria and Acetic Acid is produced which acts as a preservatives for various products such as pickles, sauce, etc.

    C2H5OH + O2    ———-à CH3COOH    + H2O
    (Alcohol)  (Oxygen)                         (Acetic Acid)

    c) Lactic Fermentation:

    In this process dextrose sugars are decomposed into lactic acid and preserve the pickles after fermentation.

    C6H12O6      ————–à   2C3H6O3
    (Dextrose)                                          (Lactic Acid)

    Source: agriinfo

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