STP1442

    Rehabilitation of Brine-Saturated Sediments

    Published: Jan 2003


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    Abstract

    A large quantity of brine-saturated fine-grained sediments (insolubles) is produced each year as a by-product of potash mining. These sediments have traditionally been disposed of in clay-lined ponds to minimize their environmental impact. Many of these ponds are now nearing capacity and there is a desire to find techniques to wash the brine from these sediments so they can be taken outside the waste management areas and used for other purposes. Laboratory studies have shown that brine can be removed from these insolubles by flushing with fresh water; however, the feasibility of de-brining by this method had not been established at field scale. As a result, a field study of three prototype de-brining systems was conducted at the Potash Corporation of Saskatchewan Inc. (PCS) Allan Potash mine. The three treatment systems investigated were: a gravity drainage pond, a reverse-flushing pond with a sand and gravel filter, and a reverse-flushing pond with a geotextile filter.

    Keywords:

    potash, reclamation of insolubles, slimes, brine removal, gravity drainage pond, reverse-flushing pond


    Author Information:

    Haug, MD
    Professor, University of Saskatchewan, Saskatoon, SK

    Barbour, SL
    Professor, University of Saskatchewan, Saskatoon, SK

    Johns, CA
    Geo-Environmental Engineer, MDH Engineered Solutions, Saskatoon, SK


    Paper ID: STP11563S

    Committee/Subcommittee: D18.25

    DOI: 10.1520/STP11563S


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