Ozonation and Thermal Pre-Treatment of Municipal Sewage Sludge-Implications for Toxicity and Methane Potential

A. Davidsson, Eva Eriksson, J. Fick

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The aim of this study was to determine effects on methane potential and overall sludge quality from two different sludge pre-treatment technologies (ozonation high/low dosage and thermal treatment 55/70 degrees C). In general both treatments produced increased methane potential. Thermal treatment resulted in higher chemical oxygen demand (COD)-solubilisation, while the highest volatile fatty acids (VFA) increase was obtained with ozonation. Sludges had inhibiting effects in a barley seed germination assay and a yeast oestrogen screen both before and after pre-treatment, but inhibition was reduced by ozone treatment and digestion. No statistical significant reduction in concentrations of included pharmaceuticals could be observed.
    Original languageEnglish
    JournalJournal of Residuals Science & Technology
    Volume10
    Issue number2
    Pages (from-to)85-91
    ISSN1544-8053
    Publication statusPublished - 2013

    Keywords

    • Anaerobic digestion
    • Ozone pretreatment
    • Pharmaceuticals
    • Waste
    • Products
    • Removal

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