Possibilities for biotechnical in situ-remediation of groundwater contaminated sulphite pulp mill effluents

H. M. Anttila, J. A. Puhakka

    Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review


    Biotechnical in situ-remediation of groundwater contaminated by sulphite pulp mill effluents was examined at laboratory scale. The contaminated groundwater and soil consisted mainly of organic substances dissolved from wood and formed during sulphite pulping. The contaminants consume oxygen in the groundwater. In situ-simulation with air-lift percolators and a semi-continuous reactor were performed in darkness at 9 °C. The highest DOC concentration was 8400 mg/1 and the average DOC reduction rate was 56.7 mg/d. The DOC reduction achieved was 13-17%. The effects of pH and the presence of the original soil material were studied. There was no significant difference in the performance of the percolators at the ambient (4.3-4.5) or adjusted (6.5-7.5) pH. Neither was the DOC reduction of the percolators containing the original soil material higher than the one containing only burned and washed sand. The possibility of maintaining a stable DOC reduction was studied with a semi-continuous reactor test. Average DOC reduction of 20 and 7.8% with hydraulic retention times of 7.6 and 1.6 days, respectively, were achieved.

    Original languageEnglish
    Title of host publicationProceedings of International Conference on Practical Applications in Environmental Geotechnology, Ecogeo 2000
    PublisherGeological Survey of Finland
    Number of pages5
    Publication statusPublished - 2001
    Publication typeA3 Book chapter

    Publication series

    NameSpecial Paper of the Geological Survey of Finland
    PublisherGeological Survey of Finland
    ISSN (Print)0782-8535


    • Bioremediation
    • Central Finland
    • Environmental geology
    • Ground water
    • In situ
    • Paper industry
    • Pollution
    • Waste water

    ASJC Scopus subject areas

    • Geology
    • Economic Geology


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