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    Lactose mother liquor as an alternative nutrient source for microbial concrete production by Sporosarcina pasteurii

    Access Status
    Fulltext not available
    Authors
    Achal, V.
    Mukherjee, Abhijit
    Basu, P.
    Reddy, M.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Achal, V. and Mukherjee, A. and Basu, P.C> and Reddy, M.S. 2009. Lactose mother liquor as an alternative nutrient source for microbial concrete production by Sporosarcina pasteurii. Journal of Industrial Microbiology and Biotechnology. 36 (3): pp. 433-438.
    Source Title
    Journal of Industrial Microbiology and Biotechnology
    DOI
    10.1007/s10295-008-0514-7
    ISSN
    1367-5435
    URI
    http://hdl.handle.net/20.500.11937/34283
    Collection
    • Curtin Research Publications
    Abstract

    Microbiologically induced calcite precipitation by the bacterium Sporosarcina pasteurii (NCIM 2477) using the industrial effluent of the dairy industry, lactose mother liquor (LML) as growth medium was demonstrated for the first time in this study. The urease activity and the calcite precipitation by the bacterium was tested in LML and compared with the standard media like nutrient media and yeast extract media. Calcite constituted 24.0% of the total weight of the sand samples plugged by S. pasteurii and urease production was found to be 353 U/ml in LML medium. The compressive strength of cement mortar was increased by S. pasteurii in all the media used compared to control. No significant difference in the growth, urease production and compressive strength of mortar among the media suggesting LML as an alternative source for standard media. This study demonstrates that microbial calcite acts as a sealing agent for filling the gaps or cracks and fissures in constructed facilities and natural formations alike.

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