Effect of freezing on the conservation of the biological activity of organic solid wastes

    Research output: Contribution to journalArticleResearchpeer-review

    25 Citations (Scopus)


    To assess the effect of freezing on the indigenous biological activity of an organic waste, five types of organic wastes (raw sludge [RS], municipal solid waste [MSW], partially processed municipal solid waste [MSWpp], digested sludge [DS] and composted organic fraction of municipal solid waste [OFMSWc]) were frozen and stored during different times to identify if the interruption of the native biological activity was recovered. Respiration indices (DRI 24h and AT 4) were used to determine the biological activity expressed as oxygen consumption. ANOVA analysis was used to compare the results. Respiration indices of RS, DS, MSWpp and OFMSWc were not affected by freezing storage during 1year. Contrarily, respiration indices of MSW samples were statistically different after 52 and 20weeks of freezing storage (DRI 24h and AT 4, respectively). Regarding the lag phase and the time to reach maximum respiration activity, frozen samples induced a significant change in the organic samples analyzed except for OFMSWc. © 2011 Elsevier Ltd.
    Original languageEnglish
    Pages (from-to)832-836
    JournalAgricultural Wastes
    Publication statusPublished - 1 Jan 2012


    • Composting
    • Freezing
    • Organic solid sample
    • Respirometry
    • Stability


    Dive into the research topics of 'Effect of freezing on the conservation of the biological activity of organic solid wastes'. Together they form a unique fingerprint.

    Cite this