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  • Improving secondary sludge biodegradability using free nitrous acid treatment

    Author(s)
    Pijuan, Maite
    Wang, Qilin
    Ye, Liu
    Yuan, Zhiguo
    Griffith University Author(s)
    Wang, Qilin
    Year published
    2012
    Metadata
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    Abstract
    This study presents a novel strategy based on free nitrous acid (FNA) treatment to improve the biodegradability of secondary sludge. Several experiments were conducted to demonstrate the biocidal effect of FNA on activated sludge. The viable fraction as well as the biological activity of the biomass decreased significantly after 8–48 h treatment with FNA. The biodegradability of the FNA treated sludge was compared to that of the same sludge without FNA treatment by aerobically digesting these sludges with a full-scale activated sludge for 14 and 6 days respectively. Ninety percent of the FNA treated biomass was consumed ...
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    This study presents a novel strategy based on free nitrous acid (FNA) treatment to improve the biodegradability of secondary sludge. Several experiments were conducted to demonstrate the biocidal effect of FNA on activated sludge. The viable fraction as well as the biological activity of the biomass decreased significantly after 8–48 h treatment with FNA. The biodegradability of the FNA treated sludge was compared to that of the same sludge without FNA treatment by aerobically digesting these sludges with a full-scale activated sludge for 14 and 6 days respectively. Ninety percent of the FNA treated biomass was consumed during the 14-day aerobic digestion compared to 41% achieved with the untreated biomass. During the 6-day aerobic digestion, 50% of the FNA-treated sludge was degraded. The results indicate that FNA treatment substantially increases sludge biodegradability.
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    Journal Title
    Bioresource Technology
    Volume
    116
    DOI
    https://doi.org/10.1016/j.biortech.2012.04.016
    Subject
    Environmental Biotechnology not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/337804
    Collection
    • Journal articles

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