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Related Experiment Videos

Hydrogen utilization by clostridia in sewage sludge

K Ohwaki, R E Hungate

    Applied and Environmental Microbiology
    |June 1, 1977
    PubMed
    Summary

    A novel sporeforming bacterium was discovered in sewage sludge. This microbe efficiently converts hydrogen and carbon dioxide into acetic acid, offering potential for biotechnological applications.

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    A cellulose-decomposing bacterium in sludge.

    Journal of bacteriology·2010

    Area of Science:

    • Microbiology
    • Environmental Science
    • Biotechnology

    Background:

    • Clostridium aceticum is a known acetogen.
    • Sewage sludge is a rich source of microbial diversity.

    Purpose of the Study:

    • To isolate and characterize a novel sporeforming bacterium from sewage sludge.
    • To investigate the metabolic capabilities of the isolated bacterium, particularly its gas conversion to acetic acid.

    Main Methods:

    • Isolation of microorganisms from sewage sludge.
    • Cultivation under anaerobic conditions.
    • Identification of metabolic products using gas chromatography and other analytical techniques.

    Main Results:

    • A novel sporeforming bacterium was isolated.
    • The bacterium demonstrated significant consumption of hydrogen (H2) and carbon dioxide (CO2).
    • Acetic acid was identified as the primary metabolic product from gas conversion.

    Conclusions:

    • The isolated bacterium is morphologically distinct from Clostridium aceticum but shares physiological similarities.
    • This organism efficiently converts H2 and CO2 into acetic acid, indicating potential for acetogenesis.
    • The findings suggest a novel microbial resource for acetic acid production from industrial or waste gases.

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