The accumulation of non- or slowly biodegradable organic compounds in an activated sludge process within a Kraft Pulp Mill

Sakari Toivakainen, Heikki Hannukainen, Timo Laukkanen, Olli Dahl

    Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference contributionScientificvertaisarvioitu

    1 Sitaatiot (Scopus)

    Abstrakti

    Adsorption of non- or slowly biodegradable organic compounds such as lignin or its derivatives on biosludge may weaken its dewatering properties and suitability for anaerobic digestion. These compounds accumulate in biosludge of an activated sludge process (ASP) within a kraft pulp mill as the sludge retention time (SRT) increases. The specific adsorption characteristics of influent COD and BOD were studied in laboratory-scale with biosludge and ferric sulphate. The accumulation of non- or slowly biodegradable compounds in biosludge was estimated by dynamic modelling using specific influent COD characteristics and the process data from an ECF kraft pulp mill. Approximately 20-30% of influent COD consisted of adsorbable organic compounds that had no effect on BOD5. Due to this fraction, the non- or slowly biodegradable organic content of mixed liquor volatile suspended solids (MLVSS) in biosludge was 45-70% with SRT varying between 25 and 60 days.

    AlkuperäiskieliEnglanti
    OtsikkoPEERS Conference 2014
    KustantajaTAPPI Press
    Sivut264-274
    Sivumäärä11
    ISBN (elektroninen)9781510815063
    TilaJulkaistu - 2014
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
    TapahtumaTAPPI PEERS Conference - Tacoma, Yhdysvallat
    Kesto: 14 syyskuuta 201417 syyskuuta 2014

    Conference

    ConferenceTAPPI PEERS Conference
    MaaYhdysvallat
    KaupunkiTacoma
    Ajanjakso14/09/201417/09/2014

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